id stringlengths 9 14 | submitter stringlengths 1 56 ⌀ | authors stringlengths 5 7.68k | title stringlengths 3 299 | comments stringlengths 1 1.15k ⌀ | journal-ref stringlengths 9 298 ⌀ | doi stringlengths 12 97 ⌀ | report-no stringlengths 3 341 ⌀ | categories stringclasses 869 values | license stringclasses 9 values | orig_abstract stringlengths 16 2.44k | versions listlengths 1 39 | update_date stringlengths 10 10 | authors_parsed listlengths 1 565 | abstract stringlengths 13 2.44k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0906.0777 | Markos Maniatis | M. Maniatis | The Next-to-Minimal Supersymmetric extension of the Standard Model
reviewed | 75 pages, 20 figures, revised version adapted to the journal
publication | Int.J.Mod.Phys.A25:3505-3602,2010 | 10.1142/S0217751X10049827 | HD-THEP-09-9 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The next-to-minimal supersymmetric extension of the Standard Model (NMSSM) is
one of the most favored supersymmetric models. After an introduction to the
model, the Higgs sector and the neutralino sector are discussed in detail.
Theoretical, experimental, and cosmological constraints are studied.
Eventually, the Higgs potential is investigated in the approach of bilinear
functions. Emphasis is placed on aspects which are different from the minimal
supersymmetric extension.
| [
{
"created": "Thu, 4 Jun 2009 16:23:56 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Sep 2010 11:17:19 GMT",
"version": "v2"
}
] | 2010-11-11 | [
[
"Maniatis",
"M.",
""
]
] | The next-to-minimal supersymmetric extension of the Standard Model (NMSSM) is one of the most favored supersymmetric models. After an introduction to the model, the Higgs sector and the neutralino sector are discussed in detail. Theoretical, experimental, and cosmological constraints are studied. Eventually, the Higgs potential is investigated in the approach of bilinear functions. Emphasis is placed on aspects which are different from the minimal supersymmetric extension. |
hep-ph/0305219 | Agnieszka Gawron | Agnieszka Gawron, Jan Kwiecinski, and Wojciech Broniowski | Unintegrated parton distributions of pions and nucleons from the CCFM
equations in the single-loop approximation | null | Phys.Rev.D68:054001,2003 | 10.1103/PhysRevD.68.054001 | null | hep-ph | null | The unintegrated quark and gluon distributions in the pion and nucleon are
analysed using the CCFM equations in the single-loop approximation. We utilise
the transverse-coordinate (or impact-parameter) representation which
diagonalises the equations and study in detail the dependence on the transverse
coordinate induced by the CCFM evolution. We find considerable broadening of
the transverse-momentum distributions with an increasing magnitude of the hard
scale, Q. For instance, at the Bjorken x=0.1 the root mean squared transverse
momentum of the gluons is enhanced by about 1 GeV when evolved from the the
initial low scale to Q^2=10 GeV^2, and by about 2 GeV when evolved up to
Q^2=100 GeV^2. The broadening effect is enhanced with decreasing Bjorken x, and
is stronger for the gluons than for the quarks. Analytic solution for the
average transverse momentum corresponding to the x-moments of the distributions
is obtained. The parton luminosities are also discussed.
| [
{
"created": "Tue, 20 May 2003 13:09:50 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Gawron",
"Agnieszka",
""
],
[
"Kwiecinski",
"Jan",
""
],
[
"Broniowski",
"Wojciech",
""
]
] | The unintegrated quark and gluon distributions in the pion and nucleon are analysed using the CCFM equations in the single-loop approximation. We utilise the transverse-coordinate (or impact-parameter) representation which diagonalises the equations and study in detail the dependence on the transverse coordinate induced by the CCFM evolution. We find considerable broadening of the transverse-momentum distributions with an increasing magnitude of the hard scale, Q. For instance, at the Bjorken x=0.1 the root mean squared transverse momentum of the gluons is enhanced by about 1 GeV when evolved from the the initial low scale to Q^2=10 GeV^2, and by about 2 GeV when evolved up to Q^2=100 GeV^2. The broadening effect is enhanced with decreasing Bjorken x, and is stronger for the gluons than for the quarks. Analytic solution for the average transverse momentum corresponding to the x-moments of the distributions is obtained. The parton luminosities are also discussed. |
1608.03838 | Stephen Jones | S. P. Jones, A. D. Martin, M. G. Ryskin and T. Teubner | Exclusive J/psi and Upsilon photoproduction and the low x gluon | 10 pages, 2 figures. To appear in the proceedings of `XXIV
International Workshop on Deep-Inelastic Scattering and Related Subjects
(DIS2016)', Hamburg (Germany), April 2016 | null | 10.1016/j.physletb.2017.01.004 | MPP-2016-260 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the potential to constrain the small-$x$ PDFs using the exclusive
production of heavy vector mesons. The calculation of $J/\psi$ and $\Upsilon$
photoproduction at NLO in collinear factorisation is described. The different
behaviour of the NLO corrections for $J/\psi$ and $\Upsilon$ is highlighted and
we outline what might be expected from the inclusion of these processes in a
PDF fit.
| [
{
"created": "Fri, 12 Aug 2016 16:10:40 GMT",
"version": "v1"
}
] | 2017-01-11 | [
[
"Jones",
"S. P.",
""
],
[
"Martin",
"A. D.",
""
],
[
"Ryskin",
"M. G.",
""
],
[
"Teubner",
"T.",
""
]
] | We discuss the potential to constrain the small-$x$ PDFs using the exclusive production of heavy vector mesons. The calculation of $J/\psi$ and $\Upsilon$ photoproduction at NLO in collinear factorisation is described. The different behaviour of the NLO corrections for $J/\psi$ and $\Upsilon$ is highlighted and we outline what might be expected from the inclusion of these processes in a PDF fit. |
1310.5733 | Alfredo Urbano | Alfredo Urbano | Remarks on analyticity and unitarity in the presence of a Strongly
Interacting Light Higgs | 14 pages, two column format. v2: references added, one figure added,
typos fixed. v3: references added. v4: minor changes | null | 10.1007/JHEP06(2014)060 | null | hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Applying the three axiomatic criteria of Lorentz invariance, analyticity and
unitarity to scattering amplitudes involving the Goldstone bosons and the Higgs
boson, we derive a general sum rule for the Strongly Interacting Light Higgs
Lagrangian. This sum rule connects the IR coefficient $c_H$ to the UV
properties of the theory, and can be used, for instance, to capture the role of
resonances in processes like $V_{\rm L}V_{\rm L}\to hh$ and $V_{\rm L}V_{\rm
L}\to V_{\rm L}V_{\rm L}$, with $V=W^{\pm},Z$.
| [
{
"created": "Mon, 21 Oct 2013 21:42:43 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Oct 2013 21:12:35 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Nov 2013 15:44:54 GMT",
"version": "v3"
},
{
"created": "Fri, 25 Apr 2014 19:55:30 GMT",
"version": "v4"
}
] | 2015-06-17 | [
[
"Urbano",
"Alfredo",
""
]
] | Applying the three axiomatic criteria of Lorentz invariance, analyticity and unitarity to scattering amplitudes involving the Goldstone bosons and the Higgs boson, we derive a general sum rule for the Strongly Interacting Light Higgs Lagrangian. This sum rule connects the IR coefficient $c_H$ to the UV properties of the theory, and can be used, for instance, to capture the role of resonances in processes like $V_{\rm L}V_{\rm L}\to hh$ and $V_{\rm L}V_{\rm L}\to V_{\rm L}V_{\rm L}$, with $V=W^{\pm},Z$. |
hep-ph/9704321 | Chris Quigg | Chris Quigg (Fermilab) | Top Priorities: Questions for Snowmass '96 | 3 pages, LaTeX2e | ECONF C960625:STC121,1996 | null | FERMILAB-CONF-96/215-T | hep-ph | null | Questions on the top quark posed for the 1996 DPF/DPB Summer Study on New
Directions for High-Energy Physics (Snowmass 96).
| [
{
"created": "Mon, 14 Apr 1997 15:20:45 GMT",
"version": "v1"
}
] | 2009-05-05 | [
[
"Quigg",
"Chris",
"",
"Fermilab"
]
] | Questions on the top quark posed for the 1996 DPF/DPB Summer Study on New Directions for High-Energy Physics (Snowmass 96). |
hep-ph/0201297 | Andriy Kurylov | M. Ramsey-Musolf and Mark B. Wise | Hadronic Light-by-Light Contribution to Muon g-2 in Chiral Perturbation
Theory | 7 pages, 2 figures | Phys.Rev.Lett. 89 (2002) 041601 | 10.1103/PhysRevLett.89.041601 | null | hep-ph | null | We compute the hadronic light-by-light scattering contributions to the muon
anomalous magnetic moment, $\amulbl$, in chiral perturbation theory that are
enhanced by large logarithms and a factor of $N_C$. They depend on a low-energy
constant entering pseudoscalar meson decay into a charged lepton pair. The
uncertainty introduced by this constant is $\pm 60\times 10^{-11}$, which is
comparable in magnitude to the present uncertainty entering the leading-order
vacuum polarization contributions to the anomalous moment. It may be reduced to
some extent through an improved measurement of the $\pi^0\to e^+ e^-$ branching
ratio. However, the dependence of $\amulbl$ on non-logarithmically enhanced
effects cannot be constrained except through the measurement of the anomalous
moment itself. The extraction of information on new physics would require a
future experimental value for the anomalous moment differing significantly from
the 2001 result reported by the E821 collaboration.
| [
{
"created": "Thu, 31 Jan 2002 02:09:07 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Feb 2002 01:45:59 GMT",
"version": "v2"
},
{
"created": "Fri, 3 May 2002 00:04:00 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Ramsey-Musolf",
"M.",
""
],
[
"Wise",
"Mark B.",
""
]
] | We compute the hadronic light-by-light scattering contributions to the muon anomalous magnetic moment, $\amulbl$, in chiral perturbation theory that are enhanced by large logarithms and a factor of $N_C$. They depend on a low-energy constant entering pseudoscalar meson decay into a charged lepton pair. The uncertainty introduced by this constant is $\pm 60\times 10^{-11}$, which is comparable in magnitude to the present uncertainty entering the leading-order vacuum polarization contributions to the anomalous moment. It may be reduced to some extent through an improved measurement of the $\pi^0\to e^+ e^-$ branching ratio. However, the dependence of $\amulbl$ on non-logarithmically enhanced effects cannot be constrained except through the measurement of the anomalous moment itself. The extraction of information on new physics would require a future experimental value for the anomalous moment differing significantly from the 2001 result reported by the E821 collaboration. |
hep-ph/9805485 | Antonio Campos | Antonio Campos and B. L. Hu | Non-equilibrium dynamics of a thermal plasma in a gravitational field | Final version published in Phys. Rev. D | Phys.Rev. D58 (1998) 125021 | 10.1103/PhysRevD.58.125021 | umdpp #98-98/MIT-CTP 2745 | hep-ph gr-qc hep-th | null | We introduce functional methods to study the non-equilibrium dynamics of a
quantum massless scalar field at finite temperature in a gravitational field.
We calculate the Close Time Path (CTP) effective action and, using its formal
equivalence with the influence functional, derive the noise and dissipation
kernels of the quantum open system in terms of quantities in thermodynamical
equilibrium. Using this fact, we formally prove the existence of a
Fluctuation-Dissipation Relation (FDR) at all temperatures between the quantum
fluctuations of the plasma in thermal equilibrium and the energy dissipated by
the external gravitational field. What is new is the identification of a
stochastic source (noise) term arising from the quantum and thermal
fluctuations in the plasma field, and the derivation of a Langevin-type
equation which describes the non-equilibrium dynamics of the gravitational
field influenced by the plasma. The back reaction of the plasma on the
gravitational field is embodied in the FDR. From the CTP effective action the
contribution of the quantum scalar field to the thermal graviton polarization
tensor can also be derived and it is shown to agree with other techniques, most
notably, Linear Response Theory (LRT). We show the connection between the LRT,
which is applicable for near-equilibrium conditions and the functional methods
used in this work which are useful for fully non-equilibrium conditions.
| [
{
"created": "Wed, 27 May 1998 20:10:49 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Dec 1998 18:59:29 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Campos",
"Antonio",
""
],
[
"Hu",
"B. L.",
""
]
] | We introduce functional methods to study the non-equilibrium dynamics of a quantum massless scalar field at finite temperature in a gravitational field. We calculate the Close Time Path (CTP) effective action and, using its formal equivalence with the influence functional, derive the noise and dissipation kernels of the quantum open system in terms of quantities in thermodynamical equilibrium. Using this fact, we formally prove the existence of a Fluctuation-Dissipation Relation (FDR) at all temperatures between the quantum fluctuations of the plasma in thermal equilibrium and the energy dissipated by the external gravitational field. What is new is the identification of a stochastic source (noise) term arising from the quantum and thermal fluctuations in the plasma field, and the derivation of a Langevin-type equation which describes the non-equilibrium dynamics of the gravitational field influenced by the plasma. The back reaction of the plasma on the gravitational field is embodied in the FDR. From the CTP effective action the contribution of the quantum scalar field to the thermal graviton polarization tensor can also be derived and it is shown to agree with other techniques, most notably, Linear Response Theory (LRT). We show the connection between the LRT, which is applicable for near-equilibrium conditions and the functional methods used in this work which are useful for fully non-equilibrium conditions. |
2202.07784 | Kei Yagyu | Cheng-Wei Chiang, Ryomei Obuchi, Kei Yagyu | Dark Sector as Origin of Light Lepton Mass and Its Phenomenology | Version accepted for publication in JHEP | null | 10.1007/JHEP05(2022)070 | OU-HET-1127 | hep-ph | http://creativecommons.org/licenses/by/4.0/ | We discuss a model with a dark sector, in which smallness of mass for charged
leptons and neutrinos can naturally be explained by one-loop effects mediated
by particles in the dark sector. These new particles, including dark matter
candidates, also contribute to the anomalous magnetic dipole moment, denoted by
$(g-2)$, for charged leptons. We show that our model can explain the muon
$(g-2)$ anomaly and observed neutrino oscillations under the constraints from
lepton flavor violating decays of charged leptons. We illustrate that the
scenario with scalar dark matter is highly constrained by direct searches at
the LHC, while that with fermionic dark matter allows for considering dark
scalars with masses of order 100 GeV. Our scenario can be tested by a precise
measurement of the muon Yukawa coupling as well as the direct production of
dark scalar bosons at future electron-positron colliders.
| [
{
"created": "Tue, 15 Feb 2022 23:19:04 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Apr 2022 05:49:15 GMT",
"version": "v2"
}
] | 2022-06-01 | [
[
"Chiang",
"Cheng-Wei",
""
],
[
"Obuchi",
"Ryomei",
""
],
[
"Yagyu",
"Kei",
""
]
] | We discuss a model with a dark sector, in which smallness of mass for charged leptons and neutrinos can naturally be explained by one-loop effects mediated by particles in the dark sector. These new particles, including dark matter candidates, also contribute to the anomalous magnetic dipole moment, denoted by $(g-2)$, for charged leptons. We show that our model can explain the muon $(g-2)$ anomaly and observed neutrino oscillations under the constraints from lepton flavor violating decays of charged leptons. We illustrate that the scenario with scalar dark matter is highly constrained by direct searches at the LHC, while that with fermionic dark matter allows for considering dark scalars with masses of order 100 GeV. Our scenario can be tested by a precise measurement of the muon Yukawa coupling as well as the direct production of dark scalar bosons at future electron-positron colliders. |
1707.03853 | Girish Kumar Chakravarty | Girish Kumar Chakravarty, Najimuddin Khan and Subhendra Mohanty | Supergravity Model of Inflation and Explaining IceCube HESE Data via PeV
Dark Matter Decay | 26 pages, 6 figures, 2 tables. Accepted for publication in 'AHEP
(Advances in High Energy Physics)' | Adv.High Energy Phys. 2020 (2020) 2478190 | 10.1155/2020/2478190 | null | hep-ph astro-ph.CO gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct an unified model of inflation and PeV dark matter with an
appropriate choice of no-scale K\"ahler potential, superpotential and gauge
kinetic function in terms of MSSM fields and hidden sector Polonyi field. The
model is consistent with the CMB observations and can explain the PeV neutrino
flux observed at IceCube HESE. A Starobinsky like Higgs-sneutrino plateau
inflation is obtained from the $D$-term SUGRA potential while $F$-term being
subdominant during inflation. To get PeV dark matter, SUSY breaking at PeV
scale is achieved through Polonyi field. This sets the scale for soft SUSY
breaking parameters $m_0, m_{1/2}, A_0 $ at the GUT scale in terms of the
parameters of the model. The low energy particles spectrum is obtained by
running the RGEs. We show that the $\sim$125 GeV higgs and the gauge coupling
unification can be obtained in this model. The $6$ PeV bino-type dark matter is
a subdominant fraction ($\sim 11\%$) of the relic density and its decay gives
the PeV scale neutrino flux observed at IceCube by appropriately choosing the
couplings of the $R$-parity violating operators. Also we find that there is a
degeneracy in scalar field parameters $(\gamma, \beta)$ and coupling $\zeta$
value in producing the correct amplitude of CMB power spectrum. However the
value of parameter $\tan(\beta)=1.8$, which is tightly fixed from the
requirement of PeV scale SUSY breaking, removes the degeneracy in the values of
the scalar field parameters to provide a unique solution for inflation. In this
way it brings the explanation for dark matter, PeV neutrinos and inflation
within the same framework.
| [
{
"created": "Wed, 12 Jul 2017 18:23:10 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Jul 2017 12:52:39 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Dec 2017 13:43:40 GMT",
"version": "v3"
},
{
"created": "Thu, 9 Jul 2020 08:20:22 GMT",
"version": "v4"
}
] | 2020-08-11 | [
[
"Chakravarty",
"Girish Kumar",
""
],
[
"Khan",
"Najimuddin",
""
],
[
"Mohanty",
"Subhendra",
""
]
] | We construct an unified model of inflation and PeV dark matter with an appropriate choice of no-scale K\"ahler potential, superpotential and gauge kinetic function in terms of MSSM fields and hidden sector Polonyi field. The model is consistent with the CMB observations and can explain the PeV neutrino flux observed at IceCube HESE. A Starobinsky like Higgs-sneutrino plateau inflation is obtained from the $D$-term SUGRA potential while $F$-term being subdominant during inflation. To get PeV dark matter, SUSY breaking at PeV scale is achieved through Polonyi field. This sets the scale for soft SUSY breaking parameters $m_0, m_{1/2}, A_0 $ at the GUT scale in terms of the parameters of the model. The low energy particles spectrum is obtained by running the RGEs. We show that the $\sim$125 GeV higgs and the gauge coupling unification can be obtained in this model. The $6$ PeV bino-type dark matter is a subdominant fraction ($\sim 11\%$) of the relic density and its decay gives the PeV scale neutrino flux observed at IceCube by appropriately choosing the couplings of the $R$-parity violating operators. Also we find that there is a degeneracy in scalar field parameters $(\gamma, \beta)$ and coupling $\zeta$ value in producing the correct amplitude of CMB power spectrum. However the value of parameter $\tan(\beta)=1.8$, which is tightly fixed from the requirement of PeV scale SUSY breaking, removes the degeneracy in the values of the scalar field parameters to provide a unique solution for inflation. In this way it brings the explanation for dark matter, PeV neutrinos and inflation within the same framework. |
0912.5375 | Goran Senjanovic | Goran Senjanovic | Proton decay and grand unification | Based on the plenary talks at the SUSY09 and PASCOS09 conferences | AIP Conf.Proc.1200:131-141,2010 | 10.1063/1.3327552 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I review the theoretical and experimental status of proton decay theory and
experiment. Regarding theory, I focus mostly, but not only, on grand
unification. I discuss only the minimal, well established SU(5) and SO(10)
models, both ordinary and supersymmetric. I show how the minimal realistic
extensions of the original Georgi - Glashow model can lead to interesting LHC
physics, and I demonstrate that the minimal supersymmetric SU(5) theory is in
perfect accord with experiment. Since no universally accepted model has of yet
emerged, I discuss the effective operator analysis of proton decay and some
related predictions from a high scale underlying theory. A strong case is made
for the improvement of experimental limits, or better the search of, two body
neutron decay modes into charged kaons and charged leptons. Their discovery
would necessarily imply a low energy physics since they practically vanish in
any theory with a desert in energies between M_W and M_GUT.
| [
{
"created": "Tue, 29 Dec 2009 21:42:47 GMT",
"version": "v1"
}
] | 2010-04-22 | [
[
"Senjanovic",
"Goran",
""
]
] | I review the theoretical and experimental status of proton decay theory and experiment. Regarding theory, I focus mostly, but not only, on grand unification. I discuss only the minimal, well established SU(5) and SO(10) models, both ordinary and supersymmetric. I show how the minimal realistic extensions of the original Georgi - Glashow model can lead to interesting LHC physics, and I demonstrate that the minimal supersymmetric SU(5) theory is in perfect accord with experiment. Since no universally accepted model has of yet emerged, I discuss the effective operator analysis of proton decay and some related predictions from a high scale underlying theory. A strong case is made for the improvement of experimental limits, or better the search of, two body neutron decay modes into charged kaons and charged leptons. Their discovery would necessarily imply a low energy physics since they practically vanish in any theory with a desert in energies between M_W and M_GUT. |
1304.4700 | Yuta Orikasa | Yuta Orikasa | Classically conformal B-L extended Standard Model and phenomenology | 4 pages, 3 figures, Toyama International Workshop on Higgs as a Probe
of New Physics 2013 | null | null | OU-HET 785 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bardeen has argued that once the classically conformal invariance and its
minimal violation by quantum anomalies are imposed on the SM, it can be free
from the quadratic divergences and hence the gauge hierarchy problem. Under the
hypothesis, We investigated the minimal B-L extended SM with a flat Higgs
potential at the Planck scale. In this model, the B-L symmetry is radiatively
broken at TeV scale. We studied phenomenology and detectability of the model at
LHC and the ILC.
| [
{
"created": "Wed, 17 Apr 2013 06:12:35 GMT",
"version": "v1"
}
] | 2013-04-18 | [
[
"Orikasa",
"Yuta",
""
]
] | Bardeen has argued that once the classically conformal invariance and its minimal violation by quantum anomalies are imposed on the SM, it can be free from the quadratic divergences and hence the gauge hierarchy problem. Under the hypothesis, We investigated the minimal B-L extended SM with a flat Higgs potential at the Planck scale. In this model, the B-L symmetry is radiatively broken at TeV scale. We studied phenomenology and detectability of the model at LHC and the ILC. |
hep-ph/0606264 | Ulrich Baur | U. Baur (Buffalo), A. Juste (FNAL), L.H. Orr (Rochester) and D.
Rainwater (Rochester) | Probing Electroweak Top Quark Couplings at Hadron and Lepton Colliders | 5 pages, 2 figures, to appear in the Proceedings of 'Loops and Legs
2006', Eisenach, Germany, April 23-28, 2006 | Nucl.Phys.Proc.Suppl.160:17-21,2006 | 10.1016/j.nuclphysbps.2006.09.098 | UB-HET-06-01 | hep-ph | null | We discuss possibilities to measure the tt-gamma and ttZ couplings at hadron
and lepton colliders. We also briefly describe how these measurements can be
used to constrain the parameter space of models of new physics, in particular
Little Higgs models.
| [
{
"created": "Sun, 25 Jun 2006 23:37:26 GMT",
"version": "v1"
}
] | 2014-11-18 | [
[
"Baur",
"U.",
"",
"Buffalo"
],
[
"Juste",
"A.",
"",
"FNAL"
],
[
"Orr",
"L. H.",
"",
"Rochester"
],
[
"Rainwater",
"D.",
"",
"Rochester"
]
] | We discuss possibilities to measure the tt-gamma and ttZ couplings at hadron and lepton colliders. We also briefly describe how these measurements can be used to constrain the parameter space of models of new physics, in particular Little Higgs models. |
hep-ph/0305034 | Geoffrey Bodwin | Geoffrey T. Bodwin and Jungil Lee (Argonne), Ramona Vogt (LBL,
UC-Davis) | Inclusive Heavy-Quarkonium Production in Hadronic Collisions | 13 pages, cernrep.cls, 9 Postscript figures, to appear in the CERN
Yellow Report for the 2001--2002 CERN workshop Hard Probes in Heavy Ion
Collisions at the LHC, references corrected and updated, acknowledgments
added | null | null | ANL-HEP-CP-03-031 | hep-ph | null | We discuss the theory of inclusive production of heavy quarkonium, the
comparison between theory and experiment, and the expected nuclear effects in
cold nuclear targets. We also present predictions, based on Nonrelativistic QCD
(NRQCD), for quarkonium production cross sections in the LHC energy range. We
find that nuclear effects in the production cross sections are largely
independent of the sizes of the NRQCD matrix elements, the charmonium state
that is produced and, in the color-octet case, largely independent of the
partonic subprocess that produces the heavy quark-antiquark pair.
| [
{
"created": "Sat, 3 May 2003 19:43:07 GMT",
"version": "v1"
},
{
"created": "Wed, 21 May 2003 19:42:54 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Aug 2003 23:00:43 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Bodwin",
"Geoffrey T.",
"",
"Argonne"
],
[
"Lee",
"Jungil",
"",
"Argonne"
],
[
"Vogt",
"Ramona",
"",
"LBL,\n UC-Davis"
]
] | We discuss the theory of inclusive production of heavy quarkonium, the comparison between theory and experiment, and the expected nuclear effects in cold nuclear targets. We also present predictions, based on Nonrelativistic QCD (NRQCD), for quarkonium production cross sections in the LHC energy range. We find that nuclear effects in the production cross sections are largely independent of the sizes of the NRQCD matrix elements, the charmonium state that is produced and, in the color-octet case, largely independent of the partonic subprocess that produces the heavy quark-antiquark pair. |
1807.04976 | Adam Kardos | Adam Kardos, Giuseppe Bevilacqua, G\'abor Somogyi, Zolt\'an
Tr\'ocs\'anyi and Zolt\'an Tulip\'ant | CoLoRFulNNLO for LHC processes | 8 pages, talk given at Loops and Legs 2018 | null | null | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In my talk I gave a status update on the extension of the CoLoRFulNNLO
subtraction method for computing QCD jet cross sections with hadrons in the
initial state. The scheme has been fully worked out previously for
electron-positron collisions and recently important steps have been made
towards generalizing it to be able to deliver corrections of the same order for
LHC processes as well. In particular, the important bottleneck of regularizing
multiple real emissions has been addressed. We demonstrate the numerical
stability of the CoLoRFulNNLO method by computing the doubly real contribution
for Higgs-boson production in gluon-gluon fusion and for W production.
| [
{
"created": "Fri, 13 Jul 2018 08:59:32 GMT",
"version": "v1"
}
] | 2018-07-16 | [
[
"Kardos",
"Adam",
""
],
[
"Bevilacqua",
"Giuseppe",
""
],
[
"Somogyi",
"Gábor",
""
],
[
"Trócsányi",
"Zoltán",
""
],
[
"Tulipánt",
"Zoltán",
""
]
] | In my talk I gave a status update on the extension of the CoLoRFulNNLO subtraction method for computing QCD jet cross sections with hadrons in the initial state. The scheme has been fully worked out previously for electron-positron collisions and recently important steps have been made towards generalizing it to be able to deliver corrections of the same order for LHC processes as well. In particular, the important bottleneck of regularizing multiple real emissions has been addressed. We demonstrate the numerical stability of the CoLoRFulNNLO method by computing the doubly real contribution for Higgs-boson production in gluon-gluon fusion and for W production. |
hep-ph/0209183 | Eduard Kuraev | E. Kuraev, M. Galynskii, A. Il'ichev | Two comments to utilization of structure function approach in DIS
experiments | 6 pages, 1 picture | null | null | null | hep-ph | null | The "returning to resonance" mechanism can be used to obtain the simple
procedure of taking RC to DIS cross section into account, in frames of
Drell-Yan picture. Iteration procedure is proposed.
Kinematic region $y \to 1$ can be described in frames of Drell-Yan picture
using structure function approach. The large RC in the lowest order reflect
Sudakov form factor suppression, which can be taken into account in all orders
of perturbation theory. Basing on explicit calculation in two lowest orders of
perturbation theory we construct the cross section in $y \to 1$ region obeying
renormalization group equations and include the Sudakov-like form factor
suppression.
| [
{
"created": "Tue, 17 Sep 2002 09:18:57 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Oct 2002 15:07:10 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kuraev",
"E.",
""
],
[
"Galynskii",
"M.",
""
],
[
"Il'ichev",
"A.",
""
]
] | The "returning to resonance" mechanism can be used to obtain the simple procedure of taking RC to DIS cross section into account, in frames of Drell-Yan picture. Iteration procedure is proposed. Kinematic region $y \to 1$ can be described in frames of Drell-Yan picture using structure function approach. The large RC in the lowest order reflect Sudakov form factor suppression, which can be taken into account in all orders of perturbation theory. Basing on explicit calculation in two lowest orders of perturbation theory we construct the cross section in $y \to 1$ region obeying renormalization group equations and include the Sudakov-like form factor suppression. |
2112.08987 | Joachim Kopp | Michael J. Baker, Moritz Breitbach, Joachim Kopp, Lukas Mittnacht,
Yotam Soreq | Filtered Baryogenesis | 32 pages, 6 figures, 1 table; v2: mistake in the source term
corrected, which leads to larger allowed parameter region in v2; added
citations | null | 10.1007/JHEP08(2022)010 | CERN-TH-2021-219 | hep-ph astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new mechanism to simultaneously explain the observed dark matter
abundance and the baryon asymmetry of the Universe. The mechanism is based on
the Filtered Dark Matter scenario, where dark matter particles acquire a large
mass during a first-order phase transition. This implies that only a small
fraction of them are energetic enough to enter the advancing true vacuum
bubbles and survive until today, while the rest are reflected and annihilate
away quickly. We supplement this scenario with a CP-violating interaction,
which creates a chiral asymmetry in the population of dark matter particles. In
the false vacuum phase, a portal interaction quickly converts the dark sector
chiral asymmetry into a Standard Model lepton asymmetry. The lepton asymmetry
is then partially converted to a baryon asymmetry by standard electroweak
sphaleron processes. We discuss the dependence of the generated asymmetry on
the parameters of the model for two different portal interactions and
demonstrate successful baryogenesis for both. For one of the portals, it is
also possible to simultaneously explain the observed dark matter abundance,
over many orders of magnitude in the dark matter mass.
| [
{
"created": "Thu, 16 Dec 2021 16:04:32 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jan 2022 10:14:14 GMT",
"version": "v2"
}
] | 2022-08-24 | [
[
"Baker",
"Michael J.",
""
],
[
"Breitbach",
"Moritz",
""
],
[
"Kopp",
"Joachim",
""
],
[
"Mittnacht",
"Lukas",
""
],
[
"Soreq",
"Yotam",
""
]
] | We propose a new mechanism to simultaneously explain the observed dark matter abundance and the baryon asymmetry of the Universe. The mechanism is based on the Filtered Dark Matter scenario, where dark matter particles acquire a large mass during a first-order phase transition. This implies that only a small fraction of them are energetic enough to enter the advancing true vacuum bubbles and survive until today, while the rest are reflected and annihilate away quickly. We supplement this scenario with a CP-violating interaction, which creates a chiral asymmetry in the population of dark matter particles. In the false vacuum phase, a portal interaction quickly converts the dark sector chiral asymmetry into a Standard Model lepton asymmetry. The lepton asymmetry is then partially converted to a baryon asymmetry by standard electroweak sphaleron processes. We discuss the dependence of the generated asymmetry on the parameters of the model for two different portal interactions and demonstrate successful baryogenesis for both. For one of the portals, it is also possible to simultaneously explain the observed dark matter abundance, over many orders of magnitude in the dark matter mass. |
1708.03473 | Kanwaljeet Singh Channey | Kanwaljeet S. Channey, Sanjeev Kumar | Phenomenological implications of two simple modifications to
Tri-Bimaximal mixing | 10 pages, 5 figures | null | 10.1142/S0217732317501371 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the phenomenological implications of breaking the Tri-Bimaximal
(TBM) mixing in such a way that either first or second column of TBM mixing
matrix remains invariant. We present two such textures and confront them with
the experimental data. We give the predictions of these textures for
atmospheric mixing angle $\theta_{23}$ and Dirac-type CP violating phase
$\delta$ that will be measured in the future experiments.
| [
{
"created": "Fri, 11 Aug 2017 08:47:13 GMT",
"version": "v1"
}
] | 2017-08-14 | [
[
"Channey",
"Kanwaljeet S.",
""
],
[
"Kumar",
"Sanjeev",
""
]
] | We study the phenomenological implications of breaking the Tri-Bimaximal (TBM) mixing in such a way that either first or second column of TBM mixing matrix remains invariant. We present two such textures and confront them with the experimental data. We give the predictions of these textures for atmospheric mixing angle $\theta_{23}$ and Dirac-type CP violating phase $\delta$ that will be measured in the future experiments. |
hep-ph/9606325 | null | Howard Baer, Ray Munroe and Xerxes Tata | Supersymmetry Studies at Future Linear $e^+e^-$ Colliders | 30 pages plus 23 figures; uuencoded text file with PS figures
available via anonymous ftp from ftp://hep.fsu.edu/preprints/baer/nlc.uu | Phys.Rev.D54:6735-6755,1996; Erratum-ibid.D56:4424,1997 | 10.1103/PhysRevD.54.6735 10.1103/PhysRevD.56.4424 | FSU-HEP-960601 and UH-511-850-96 | hep-ph | null | We examine various aspects of supersymmetric particle production at linear
$e^+e^-$ colliders operating at a centre of mass energy of $\sqrt{s}=500$ GeV,
and integrated luminosity of $\int {\cal L}dt=20-50$ fb$^{-1}$. Working within
the framework of the minimal supergravity model with gauge coupling unification
and radiative electroweak symmetry breaking (SUGRA), we study various
signatures for detection of sparticles, taking into account their cascade
decays, and map out the regions of parameter space where these are observable.
We also examine strategies to isolate different SUSY processes from another. In
addition, we perform four detailed SUGRA case studies and examine the
detectability of sparticles when several SUSY processes are simultaneously
occuring. We show that precision mass measurements of neutralinos, sneutrinos
and top-squarks are possible, in addition to previously studied precision mass
measurements of sleptons and charginos.
| [
{
"created": "Thu, 13 Jun 1996 17:42:46 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Baer",
"Howard",
""
],
[
"Munroe",
"Ray",
""
],
[
"Tata",
"Xerxes",
""
]
] | We examine various aspects of supersymmetric particle production at linear $e^+e^-$ colliders operating at a centre of mass energy of $\sqrt{s}=500$ GeV, and integrated luminosity of $\int {\cal L}dt=20-50$ fb$^{-1}$. Working within the framework of the minimal supergravity model with gauge coupling unification and radiative electroweak symmetry breaking (SUGRA), we study various signatures for detection of sparticles, taking into account their cascade decays, and map out the regions of parameter space where these are observable. We also examine strategies to isolate different SUSY processes from another. In addition, we perform four detailed SUGRA case studies and examine the detectability of sparticles when several SUSY processes are simultaneously occuring. We show that precision mass measurements of neutralinos, sneutrinos and top-squarks are possible, in addition to previously studied precision mass measurements of sleptons and charginos. |
hep-ph/9912462 | Neufeld Collaborador de Toni Pich | H. Neufeld | Chiral Perturbation Theory with Photons and Leptons | 6pages, Latex, Talk given at the 8th International Symposium on
Meson-Nucleon Physics and the Structure of the Nucleon, Zuoz, Switzerland,
August 15-21, 1999 | PiN Newslett.15:189-192,1999 | null | UWThPh-1999-46 | hep-ph | null | I discuss a low-energy effective field theory which permits the full
treatment of isospin-breaking effects in semileptonic weak interactions. In
addition to the pseudoscalars and the photon, also the light leptons have to be
included as dynamical degrees of freedom in an appropriate chiral Lagrangian. I
describe the construction of the local action at next-to-leading order.
| [
{
"created": "Wed, 22 Dec 1999 12:53:17 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Neufeld",
"H.",
""
]
] | I discuss a low-energy effective field theory which permits the full treatment of isospin-breaking effects in semileptonic weak interactions. In addition to the pseudoscalars and the photon, also the light leptons have to be included as dynamical degrees of freedom in an appropriate chiral Lagrangian. I describe the construction of the local action at next-to-leading order. |
hep-ph/0612095 | Christos Doudoulakis | C.G.Doudoulakis | On axially symmetrical solitons in Abelian-Higgs models | 15 pages, 8 figures, Accepted for publication in Physica D | PhysicaD228:159-165,2007 | 10.1016/j.physd.2007.03.005 | null | hep-ph | null | A numerical search for bosonic superconducting static vortex rings in a
$U(1)_{A}\times U(1)_{W}$ model is presented. The fate of these rings without
current, is to shrink due to their tension until extinction. The
superconductivity of the loop does not seem to prevent shrinking. Current
quenching takes place before stabilization.
| [
{
"created": "Fri, 8 Dec 2006 13:04:22 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Feb 2007 10:21:49 GMT",
"version": "v2"
},
{
"created": "Fri, 20 Apr 2007 06:44:14 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Doudoulakis",
"C. G.",
""
]
] | A numerical search for bosonic superconducting static vortex rings in a $U(1)_{A}\times U(1)_{W}$ model is presented. The fate of these rings without current, is to shrink due to their tension until extinction. The superconductivity of the loop does not seem to prevent shrinking. Current quenching takes place before stabilization. |
1904.08154 | Alexey Zhevlakov | Alexey S. Zhevlakov, Thomas Gutsche, Valery E. Lyubovitskij | Updated limits on the CP violating $\eta\pi\pi$ and $\eta'\pi\pi$
couplings derived from the neutron EDM | 6 pages, 2 figures | Phys. Rev. D 99, 115004 (2019) | 10.1103/PhysRevD.99.115004 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We complete our derivation of upper limits on the CP violating $\eta\pi\pi$
and $\eta'\pi\pi$ couplings from an analysis of their two-loop contributions to
the neutron electric dipole moment (nEDM). We use a phenomenological Lagrangian
approach which is formulated in terms of hadronic degrees of freedom - nucleons
and pseudoscalar mesons. The essential part of the Lagrangian contains the CP
violating couplings between $\eta(\eta')$ and pions. Previously, we included
photons using minimal substitution in case of the proton and charged pions. Now
we extend our Lagrangian by adding the nonminimal couplings, i.e. anomalous
magnetic couplings of nucleons with the photon. The obtained numerical upper
limits for the $\eta\pi\pi$ and $\eta'\pi\pi$ couplings
$|f_{\eta\pi\pi}(M_\eta^2)|<4.4 \times10^{-11}$ and
$|f_{\eta^\prime\pi\pi}(M_{\eta'}^2)|<3.8 \times10^{-11}$ can be useful for the
related, planned experiments at the JLab Eta Factory. Using present
experimental limits on the nEDM, we derive upper limits on the CP violating
$\bar\theta$ parameter of $\bar{\mathrm{\theta}}<4.7 \times 10^{-10}$.
| [
{
"created": "Wed, 17 Apr 2019 09:30:53 GMT",
"version": "v1"
}
] | 2019-06-12 | [
[
"Zhevlakov",
"Alexey S.",
""
],
[
"Gutsche",
"Thomas",
""
],
[
"Lyubovitskij",
"Valery E.",
""
]
] | We complete our derivation of upper limits on the CP violating $\eta\pi\pi$ and $\eta'\pi\pi$ couplings from an analysis of their two-loop contributions to the neutron electric dipole moment (nEDM). We use a phenomenological Lagrangian approach which is formulated in terms of hadronic degrees of freedom - nucleons and pseudoscalar mesons. The essential part of the Lagrangian contains the CP violating couplings between $\eta(\eta')$ and pions. Previously, we included photons using minimal substitution in case of the proton and charged pions. Now we extend our Lagrangian by adding the nonminimal couplings, i.e. anomalous magnetic couplings of nucleons with the photon. The obtained numerical upper limits for the $\eta\pi\pi$ and $\eta'\pi\pi$ couplings $|f_{\eta\pi\pi}(M_\eta^2)|<4.4 \times10^{-11}$ and $|f_{\eta^\prime\pi\pi}(M_{\eta'}^2)|<3.8 \times10^{-11}$ can be useful for the related, planned experiments at the JLab Eta Factory. Using present experimental limits on the nEDM, we derive upper limits on the CP violating $\bar\theta$ parameter of $\bar{\mathrm{\theta}}<4.7 \times 10^{-10}$. |
hep-ph/0106352 | Howie Baer | Howard Baer and Javier Ferrandis | Supersymmetric SO(10) GUT Models with Yukawa Unification and a Positive
Mu Term | 10 page REVTEX file with 2 PS figures; bug fix necessitated revised
figures and text | Phys.Rev.Lett. 87 (2001) 211803 | 10.1103/PhysRevLett.87.211803 | FSU-HEP-010701 | hep-ph | null | Supersymmetric grand unified models based on SO(10) gauge symmetry have many
desireable features, including the unification of Yukawa couplings. Using
D-term contributions to scalar masses arising from the breakdown of SO(10),
Yukawa coupling unification only to 30% can be achieved in models with a
positive superpotential Higgs mass. The superparticle mass spectrum is highly
constrained, and yields relatively light top squarks and charginos.
Surprisingly, the pattern of GUT scale soft SUSY breaking masses are close to
those found in the context of inverted hierarchy models. Our analysis supports
the idea that the low energy MSSM parameter space is an approximate SO(10)
inspired fixed point.
| [
{
"created": "Fri, 29 Jun 2001 19:07:04 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Aug 2001 16:23:11 GMT",
"version": "v2"
},
{
"created": "Fri, 21 Sep 2001 14:08:54 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Baer",
"Howard",
""
],
[
"Ferrandis",
"Javier",
""
]
] | Supersymmetric grand unified models based on SO(10) gauge symmetry have many desireable features, including the unification of Yukawa couplings. Using D-term contributions to scalar masses arising from the breakdown of SO(10), Yukawa coupling unification only to 30% can be achieved in models with a positive superpotential Higgs mass. The superparticle mass spectrum is highly constrained, and yields relatively light top squarks and charginos. Surprisingly, the pattern of GUT scale soft SUSY breaking masses are close to those found in the context of inverted hierarchy models. Our analysis supports the idea that the low energy MSSM parameter space is an approximate SO(10) inspired fixed point. |
1806.07396 | David Curtin | David Curtin, Marco Drewes, Matthew McCullough, Patrick Meade,
Rabindra N. Mohapatra, Jessie Shelton, Brian Shuve, Elena Accomando,
Cristiano Alpigiani, Stefan Antusch, Juan Carlos Arteaga-Vel\'azquez, Brian
Batell, Martin Bauer, Nikita Blinov, Karen Salom\'e Caballero-Mora, Jae Hyeok
Chang, Eung Jin Chun, Raymond T. Co, Timothy Cohen, Peter Cox, Nathaniel
Craig, Csaba Cs\'aki, Yanou Cui, Francesco D'Eramo, Luigi Delle Rose, P. S.
Bhupal Dev, Keith R. Dienes, Jeff A. Dror, Rouven Essig, Jared A. Evans,
Jason L. Evans, Arturo Fern\'andez Tellez, Oliver Fischer, Thomas Flacke,
Anthony Fradette, Claudia Frugiuele, Elina Fuchs, Tony Gherghetta, Gian F.
Giudice, Dmitry Gorbunov, Rick S. Gupta, Claudia Hagedorn, Lawrence J. Hall,
Philip Harris, Juan Carlos Helo, Martin Hirsch, Yonit Hochberg, Anson Hook,
Alejandro Ibarra, Seyda Ipek, Sunghoon Jung, Simon Knapen, Eric Kuflik, Zhen
Liu, Salvator Lombardo, H. J. Lubatti, David McKeen, Emiliano Molinaro,
Stefano Moretti, Natsumi Nagata, Matthias Neubert, Jose Miguel No, Emmanuel
Olaiya, Gilad Perez, Michael E. Peskin, David Pinner, Maxim Pospelov, Matthew
Reece, Dean J. Robinson, Mario Rodr\'iguez Cahuantzi, Rinaldo Santonico,
Matthias Schlaffer, Claire H. Shepherd-Themistocleous, Andrew Spray, Daniel
Stolarski, Martin A. Subieta Vasquez, Raman Sundrum, Andrea Thamm, Brooks
Thomas, Yuhsin Tsai, Brock Tweedie, Stephen M. West, Charles Young, Felix Yu,
Bryan Zaldivar, Yongchao Zhang, Kathryn Zurek, Jos\'e Zurita | Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case | 213 pages, 73 figures. Extended Section 2 to add more detailed
discussion of LLP reconstruction and analysis, and background rejection.
Updated comparison of MATHUSLA RH neutrino sensitivity to other experiments.
Updated analysis of long-lived ALPs produced in weak-scale processes and
decaying to jets. Various clarifications, fixed typos, and added references.
Results and conclusions unchanged | null | 10.1088/1361-6633/ab28d6 | null | hep-ph hep-ex | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the theoretical motivations for long-lived particle (LLP) signals
at the LHC in a comprehensive survey of Standard Model (SM) extensions. LLPs
are a common prediction of a wide range of theories that address unsolved
fundamental mysteries such as naturalness, dark matter, baryogenesis and
neutrino masses, and represent a natural and generic possibility for physics
beyond the SM (BSM). In most cases the LLP lifetime can be treated as a free
parameter from the $\mu$m scale up to the Big Bang Nucleosynthesis limit of
$\sim 10^7$m. Neutral LLPs with lifetimes above $\sim$ 100m are particularly
difficult to probe, as the sensitivity of the LHC main detectors is limited by
challenging backgrounds, triggers, and small acceptances. MATHUSLA is a
proposal for a minimally instrumented, large-volume surface detector near ATLAS
or CMS. It would search for neutral LLPs produced in HL-LHC collisions by
reconstructing displaced vertices (DVs) in a low-background environment,
extending the sensitivity of the main detectors by orders of magnitude in the
long-lifetime regime. In this white paper we study the LLP physics
opportunities afforded by a MATHUSLA-like detector at the HL-LHC. We develop a
model-independent approach to describe the sensitivity of MATHUSLA to BSM LLP
signals, and compare it to DV and missing energy searches at ATLAS or CMS. We
then explore the BSM motivations for LLPs in considerable detail, presenting a
large number of new sensitivity studies. While our discussion is especially
oriented towards the long-lifetime regime at MATHUSLA, this survey underlines
the importance of a varied LLP search program at the LHC in general. By
synthesizing these results into a general discussion of the top-down and
bottom-up motivations for LLP searches, it is our aim to demonstrate the
exceptional strength and breadth of the physics case for the construction of
the MATHUSLA detector.
| [
{
"created": "Tue, 19 Jun 2018 18:00:04 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Mar 2019 16:17:41 GMT",
"version": "v2"
}
] | 2020-01-08 | [
[
"Curtin",
"David",
""
],
[
"Drewes",
"Marco",
""
],
[
"McCullough",
"Matthew",
""
],
[
"Meade",
"Patrick",
""
],
[
"Mohapatra",
"Rabindra N.",
""
],
[
"Shelton",
"Jessie",
""
],
[
"Shuve",
"Brian",
""
],
[
"Accomando",
"Elena",
""
],
[
"Alpigiani",
"Cristiano",
""
],
[
"Antusch",
"Stefan",
""
],
[
"Arteaga-Velázquez",
"Juan Carlos",
""
],
[
"Batell",
"Brian",
""
],
[
"Bauer",
"Martin",
""
],
[
"Blinov",
"Nikita",
""
],
[
"Caballero-Mora",
"Karen Salomé",
""
],
[
"Chang",
"Jae Hyeok",
""
],
[
"Chun",
"Eung Jin",
""
],
[
"Co",
"Raymond T.",
""
],
[
"Cohen",
"Timothy",
""
],
[
"Cox",
"Peter",
""
],
[
"Craig",
"Nathaniel",
""
],
[
"Csáki",
"Csaba",
""
],
[
"Cui",
"Yanou",
""
],
[
"D'Eramo",
"Francesco",
""
],
[
"Rose",
"Luigi Delle",
""
],
[
"Dev",
"P. S. Bhupal",
""
],
[
"Dienes",
"Keith R.",
""
],
[
"Dror",
"Jeff A.",
""
],
[
"Essig",
"Rouven",
""
],
[
"Evans",
"Jared A.",
""
],
[
"Evans",
"Jason L.",
""
],
[
"Tellez",
"Arturo Fernández",
""
],
[
"Fischer",
"Oliver",
""
],
[
"Flacke",
"Thomas",
""
],
[
"Fradette",
"Anthony",
""
],
[
"Frugiuele",
"Claudia",
""
],
[
"Fuchs",
"Elina",
""
],
[
"Gherghetta",
"Tony",
""
],
[
"Giudice",
"Gian F.",
""
],
[
"Gorbunov",
"Dmitry",
""
],
[
"Gupta",
"Rick S.",
""
],
[
"Hagedorn",
"Claudia",
""
],
[
"Hall",
"Lawrence J.",
""
],
[
"Harris",
"Philip",
""
],
[
"Helo",
"Juan Carlos",
""
],
[
"Hirsch",
"Martin",
""
],
[
"Hochberg",
"Yonit",
""
],
[
"Hook",
"Anson",
""
],
[
"Ibarra",
"Alejandro",
""
],
[
"Ipek",
"Seyda",
""
],
[
"Jung",
"Sunghoon",
""
],
[
"Knapen",
"Simon",
""
],
[
"Kuflik",
"Eric",
""
],
[
"Liu",
"Zhen",
""
],
[
"Lombardo",
"Salvator",
""
],
[
"Lubatti",
"H. J.",
""
],
[
"McKeen",
"David",
""
],
[
"Molinaro",
"Emiliano",
""
],
[
"Moretti",
"Stefano",
""
],
[
"Nagata",
"Natsumi",
""
],
[
"Neubert",
"Matthias",
""
],
[
"No",
"Jose Miguel",
""
],
[
"Olaiya",
"Emmanuel",
""
],
[
"Perez",
"Gilad",
""
],
[
"Peskin",
"Michael E.",
""
],
[
"Pinner",
"David",
""
],
[
"Pospelov",
"Maxim",
""
],
[
"Reece",
"Matthew",
""
],
[
"Robinson",
"Dean J.",
""
],
[
"Cahuantzi",
"Mario Rodríguez",
""
],
[
"Santonico",
"Rinaldo",
""
],
[
"Schlaffer",
"Matthias",
""
],
[
"Shepherd-Themistocleous",
"Claire H.",
""
],
[
"Spray",
"Andrew",
""
],
[
"Stolarski",
"Daniel",
""
],
[
"Vasquez",
"Martin A. Subieta",
""
],
[
"Sundrum",
"Raman",
""
],
[
"Thamm",
"Andrea",
""
],
[
"Thomas",
"Brooks",
""
],
[
"Tsai",
"Yuhsin",
""
],
[
"Tweedie",
"Brock",
""
],
[
"West",
"Stephen M.",
""
],
[
"Young",
"Charles",
""
],
[
"Yu",
"Felix",
""
],
[
"Zaldivar",
"Bryan",
""
],
[
"Zhang",
"Yongchao",
""
],
[
"Zurek",
"Kathryn",
""
],
[
"Zurita",
"José",
""
]
] | We examine the theoretical motivations for long-lived particle (LLP) signals at the LHC in a comprehensive survey of Standard Model (SM) extensions. LLPs are a common prediction of a wide range of theories that address unsolved fundamental mysteries such as naturalness, dark matter, baryogenesis and neutrino masses, and represent a natural and generic possibility for physics beyond the SM (BSM). In most cases the LLP lifetime can be treated as a free parameter from the $\mu$m scale up to the Big Bang Nucleosynthesis limit of $\sim 10^7$m. Neutral LLPs with lifetimes above $\sim$ 100m are particularly difficult to probe, as the sensitivity of the LHC main detectors is limited by challenging backgrounds, triggers, and small acceptances. MATHUSLA is a proposal for a minimally instrumented, large-volume surface detector near ATLAS or CMS. It would search for neutral LLPs produced in HL-LHC collisions by reconstructing displaced vertices (DVs) in a low-background environment, extending the sensitivity of the main detectors by orders of magnitude in the long-lifetime regime. In this white paper we study the LLP physics opportunities afforded by a MATHUSLA-like detector at the HL-LHC. We develop a model-independent approach to describe the sensitivity of MATHUSLA to BSM LLP signals, and compare it to DV and missing energy searches at ATLAS or CMS. We then explore the BSM motivations for LLPs in considerable detail, presenting a large number of new sensitivity studies. While our discussion is especially oriented towards the long-lifetime regime at MATHUSLA, this survey underlines the importance of a varied LLP search program at the LHC in general. By synthesizing these results into a general discussion of the top-down and bottom-up motivations for LLP searches, it is our aim to demonstrate the exceptional strength and breadth of the physics case for the construction of the MATHUSLA detector. |
2407.16963 | Mayank Singh | Joseph I. Kapusta, Mayank Singh, Thomas Welle | Spinodal decomposition in rapidly expanding quark gluon plasma | 18 pages, 7 figures | null | null | null | hep-ph nucl-th | http://creativecommons.org/licenses/by/4.0/ | Quantum Chromodynamics (QCD) is expected to have a first order phase
transition between the confined hadron gas and the deconfined quark gluon
plasma at high baryon densities. This will result in phase boundary effects in
the metastable and unstable regions. It is important to include these effects
in phenomenological models of heavy ion collisions to identify experimental
signatures of a phase transition. This requires building intuition on phase
separation in rapidly expanding fluids. In this work we present the equations
of relativistic hydrodynamics with a phase boundary, provide prescriptions to
extend the equation of state to metastable and unstable regions, and show the
effects of spinodal separation in a Bjorken flow.
| [
{
"created": "Wed, 24 Jul 2024 03:02:25 GMT",
"version": "v1"
}
] | 2024-07-25 | [
[
"Kapusta",
"Joseph I.",
""
],
[
"Singh",
"Mayank",
""
],
[
"Welle",
"Thomas",
""
]
] | Quantum Chromodynamics (QCD) is expected to have a first order phase transition between the confined hadron gas and the deconfined quark gluon plasma at high baryon densities. This will result in phase boundary effects in the metastable and unstable regions. It is important to include these effects in phenomenological models of heavy ion collisions to identify experimental signatures of a phase transition. This requires building intuition on phase separation in rapidly expanding fluids. In this work we present the equations of relativistic hydrodynamics with a phase boundary, provide prescriptions to extend the equation of state to metastable and unstable regions, and show the effects of spinodal separation in a Bjorken flow. |
hep-ph/0211119 | Edward Shuryak | E.V. Shuryak and G.E.Brown | Matter-induced modification of resonances at RHIC freezeout | A comment about width modification added, some misspelling corrected | Nucl.Phys.A717:322-335,2003 | 10.1016/S0375-9474(03)00672-9 | null | hep-ph | null | We discuss the physical effects causing a modification of resonance masses,
widths and even shapes in a dilute hadronic gas at late stages of heavy ion
collisions. We quantify the conditions at which resonances are produced at
RHIC, and found that it happens at $T\approx 120 MeV$. Although in the pp case
the ``kinematic'' effects like thermal weighting of the states is sufficient,
in AA we see a clear effect of dynamical interaction with matter, both due to a
variety of s-channel resonances and due to t-channel scalar exchanges. The
particular quantity we focus mostly on is the $\rho$ meson mass, for which
these dynamical effects lead to about -50 MeV shift, on top of about -20 MeV of
a thermal effect: both agree well with preliminary data from STAR experiment at
RHIC. We also predict a complete change of shape of $f_0(600)$ resonance, even
by thermal effects alone.
| [
{
"created": "Fri, 8 Nov 2002 14:51:30 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Nov 2002 19:37:25 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Shuryak",
"E. V.",
""
],
[
"Brown",
"G. E.",
""
]
] | We discuss the physical effects causing a modification of resonance masses, widths and even shapes in a dilute hadronic gas at late stages of heavy ion collisions. We quantify the conditions at which resonances are produced at RHIC, and found that it happens at $T\approx 120 MeV$. Although in the pp case the ``kinematic'' effects like thermal weighting of the states is sufficient, in AA we see a clear effect of dynamical interaction with matter, both due to a variety of s-channel resonances and due to t-channel scalar exchanges. The particular quantity we focus mostly on is the $\rho$ meson mass, for which these dynamical effects lead to about -50 MeV shift, on top of about -20 MeV of a thermal effect: both agree well with preliminary data from STAR experiment at RHIC. We also predict a complete change of shape of $f_0(600)$ resonance, even by thermal effects alone. |
hep-ph/9811321 | Borut Bajc | Borut Bajc and Goran Senjanovic | High Temperature Symmetry Breaking via Flat Directions | 4 pages, 1 Postscript figure, some minor changes and references added | Phys.Rev. D61 (2000) 103506 | 10.1103/PhysRevD.61.103506 | IJS-TP-98/24 | hep-ph | null | We show that the natural presence of flat directions in supersymmetric
theories allows for nonrestoration of global and/or gauge symmetries. This has
important cosmological consequences for supersymmetric GUTs and in particular
it offers a solution of the monopole problem.
| [
{
"created": "Fri, 13 Nov 1998 10:13:52 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Jun 1999 18:08:55 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Bajc",
"Borut",
""
],
[
"Senjanovic",
"Goran",
""
]
] | We show that the natural presence of flat directions in supersymmetric theories allows for nonrestoration of global and/or gauge symmetries. This has important cosmological consequences for supersymmetric GUTs and in particular it offers a solution of the monopole problem. |
hep-ph/9409444 | Konstantin Chetyrkin | K.G.Chetyrkin and J.H. K\"uhn | $R_{had}$ at the $B$-factory | report# TTP94-12. pages, LaTex (uses epsfig.sty, a figure appended as
uuencoded eps-file). A complete postscript file, including the figure, is
available via anonymous ftp at
ftp://ttpux2.physik.uni-karlsruhe.de/pub/ttp94-12/ttp94-12.ps
(129.13.102.139), Local preprint# TTP94-12 | Phys.Lett.B342:356-361,1995 | 10.1016/0370-2693(94)01376-N | null | hep-ph | null | A systematic theoretical evaluation of the cross section for hadron
production in electron-positron collisions in the energy range just below the
$B$ meson threshold is presented which includes charm and bottom mass effects
and is accurate to order $\as^3$. The corresponding measurement in the energy
region several $GeV$ above the threshold is also discussed.
| [
{
"created": "Thu, 29 Sep 1994 21:22:14 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Chetyrkin",
"K. G.",
""
],
[
"Kühn",
"J. H.",
""
]
] | A systematic theoretical evaluation of the cross section for hadron production in electron-positron collisions in the energy range just below the $B$ meson threshold is presented which includes charm and bottom mass effects and is accurate to order $\as^3$. The corresponding measurement in the energy region several $GeV$ above the threshold is also discussed. |
1909.05876 | Duarte Fontes | Duarte Fontes, Jorge C. Rom\~ao | FeynMaster: a plethora of Feynman tools | 32 pages, matches published version | null | null | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | FeynMaster is a multi-tasking software for particle physics studies. By
making use of already existing programs (FeynRules, QGRAF, FeynCalc),
FeynMaster automatically generates Feynman rules, generates and draws Feynman
diagrams, generates amplitudes, performs both loop and algebraic calculations,
and fully renormalizes models. In parallel with this automatic character,
FeynMaster allows the user to manipulate the generated results in Mathematica
notebooks in a flexible and consistent way. It can be downloaded in
https://porthos.tecnico.ulisboa.pt/FeynMaster/.
| [
{
"created": "Thu, 12 Sep 2019 18:00:12 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Apr 2020 14:15:37 GMT",
"version": "v2"
}
] | 2020-04-17 | [
[
"Fontes",
"Duarte",
""
],
[
"Romão",
"Jorge C.",
""
]
] | FeynMaster is a multi-tasking software for particle physics studies. By making use of already existing programs (FeynRules, QGRAF, FeynCalc), FeynMaster automatically generates Feynman rules, generates and draws Feynman diagrams, generates amplitudes, performs both loop and algebraic calculations, and fully renormalizes models. In parallel with this automatic character, FeynMaster allows the user to manipulate the generated results in Mathematica notebooks in a flexible and consistent way. It can be downloaded in https://porthos.tecnico.ulisboa.pt/FeynMaster/. |
hep-ph/9804367 | Daniel A. Bauer | David O. Caldwell | The Status of Neutrino Mass | 15 pages, 4 figures, LaTex To be published in Cosmo'97 conference
proceedings | Int.J.Mod.Phys. A13 (1998) 4409-4424 | 10.1142/S0217751X98002122 | UCSB-HEP-98-02 | hep-ph | null | New experimental results, if correct, require at least one light sterile
neutrino, in addition to the three active ones, to accommodate the mass
differences required to explain the solar $\nu_e$ deficit, the anomalous
$\nu/e$ ratio produced by atmospheric neutrinos, and either the candidate
events for $\nu_\mu\to\nu_e$ (or $\bar\nu_\mu\to\bar\nu_e$) from the LSND
experiment, or the possible need for a hot component of dark matter. This
neutrino mass pattern can not only accommodate all these four requirements, but
also provide a robust solution to a problem presently making heavy-element
synthesis by supernovae impossible and resolve a possible discrepancy between
big bang nucleosynthesis theory and observations.
| [
{
"created": "Thu, 23 Apr 1998 00:26:22 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Caldwell",
"David O.",
""
]
] | New experimental results, if correct, require at least one light sterile neutrino, in addition to the three active ones, to accommodate the mass differences required to explain the solar $\nu_e$ deficit, the anomalous $\nu/e$ ratio produced by atmospheric neutrinos, and either the candidate events for $\nu_\mu\to\nu_e$ (or $\bar\nu_\mu\to\bar\nu_e$) from the LSND experiment, or the possible need for a hot component of dark matter. This neutrino mass pattern can not only accommodate all these four requirements, but also provide a robust solution to a problem presently making heavy-element synthesis by supernovae impossible and resolve a possible discrepancy between big bang nucleosynthesis theory and observations. |
1903.11560 | Manuel Pavon Valderrama | Ming-Zhu Liu, Ya-Wen Pan, Fang-Zheng Peng, Mario Sanchez Sanchez,
Li-Sheng Geng, Atsushi Hosaka, Manuel Pavon Valderrama | Emergence of a complete heavy-quark spin symmetry multiplet: seven
molecular pentaquarks in light of the latest LHCb analysis | Corresponds to the version to be published in Physical Review
Letters; 4 pages, 1 table summarizing the results, the names of the scenarios
have been exchanged to reflect their theoretical preference (scenario A now
corresponds to the more likely scenario in pionless EFT) | Phys. Rev. Lett. 122, 242001 (2019) | 10.1103/PhysRevLett.122.242001 | null | hep-ph hep-ex hep-lat nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A recent analysis by the LHCb collaboration suggests the existence of three
narrow pentaquark-like states --- the $P_c(4312)$,$P_c(4440)$ and $P_c(4457)$
--- instead of just one in the previous analysis (the $P_c(4450)$). The
closeness of the $P_c(4312)$ to the $\bar{D} \Sigma_c$ threshold and the
$P_c(4440)$/$P_c(4457)$ to the $\bar{D}^* \Sigma_c$ one suggests a molecular
interpretation of these resonances. We show that these three pentaquark-like
resonances can be naturally accommodated in a contact-range effective field
theory description that incorporates heavy-quark spin symmetry. This
description leads to the prediction of all the seven possible S-wave heavy
antimeson-baryon molecules (that is, there should be four additional molecular
pentaquarks in addition to the $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$),
providing the first example of a heavy-quark spin symmetry molecular multiplet
that is complete. If this is confirmed, it will not only give us an impressive
example of the application of heavy-quark symmetries and effective field
theories in hadron physics: it will also uncover a clear and powerful ordering
principle for the molecular spectrum, reminiscent of the SU(3)-flavor
multiplets to which the light hadron spectrum conforms.
| [
{
"created": "Wed, 27 Mar 2019 17:19:33 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Apr 2019 14:52:40 GMT",
"version": "v2"
},
{
"created": "Sat, 15 Jun 2019 08:38:19 GMT",
"version": "v3"
}
] | 2019-06-26 | [
[
"Liu",
"Ming-Zhu",
""
],
[
"Pan",
"Ya-Wen",
""
],
[
"Peng",
"Fang-Zheng",
""
],
[
"Sanchez",
"Mario Sanchez",
""
],
[
"Geng",
"Li-Sheng",
""
],
[
"Hosaka",
"Atsushi",
""
],
[
"Valderrama",
"Manuel Pavon",
""
]
] | A recent analysis by the LHCb collaboration suggests the existence of three narrow pentaquark-like states --- the $P_c(4312)$,$P_c(4440)$ and $P_c(4457)$ --- instead of just one in the previous analysis (the $P_c(4450)$). The closeness of the $P_c(4312)$ to the $\bar{D} \Sigma_c$ threshold and the $P_c(4440)$/$P_c(4457)$ to the $\bar{D}^* \Sigma_c$ one suggests a molecular interpretation of these resonances. We show that these three pentaquark-like resonances can be naturally accommodated in a contact-range effective field theory description that incorporates heavy-quark spin symmetry. This description leads to the prediction of all the seven possible S-wave heavy antimeson-baryon molecules (that is, there should be four additional molecular pentaquarks in addition to the $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$), providing the first example of a heavy-quark spin symmetry molecular multiplet that is complete. If this is confirmed, it will not only give us an impressive example of the application of heavy-quark symmetries and effective field theories in hadron physics: it will also uncover a clear and powerful ordering principle for the molecular spectrum, reminiscent of the SU(3)-flavor multiplets to which the light hadron spectrum conforms. |
hep-ph/0202136 | Neal Weiner | Savas Dimopoulos, David E. Kaplan, Neal Weiner | Electroweak Unification into a Five-Dimensional SU(3) at a TeV | 8 pages, 3 figures, LaTeX | Phys.Lett. B534 (2002) 124-130 | 10.1016/S0370-2693(02)01594-0 | null | hep-ph hep-th | null | We apply a recently proposed mechanism for predicting the weak mixing angle
to theories with TeV-size dimensions. "Reconstruction" of the associated moose
(or quiver) leads to theories which unify the electroweak forces into a five
dimensional SU(3) symmetry. Quarks live at an orbifold fixed point where SU(3)
breaks to the electroweak group. A variety of theories -- all sharing the same
successful prediction of the weak mixing angle -- emerges; they differ
primarily by the spatial location of the leptons and the absence or presence of
supersymmetry. A particularly interesting theory puts leptons in a
Konopinski-Mahmoud triplet and suppresses proton decay by placing quarks and
leptons on opposite fixed points.
| [
{
"created": "Thu, 14 Feb 2002 20:34:35 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Dimopoulos",
"Savas",
""
],
[
"Kaplan",
"David E.",
""
],
[
"Weiner",
"Neal",
""
]
] | We apply a recently proposed mechanism for predicting the weak mixing angle to theories with TeV-size dimensions. "Reconstruction" of the associated moose (or quiver) leads to theories which unify the electroweak forces into a five dimensional SU(3) symmetry. Quarks live at an orbifold fixed point where SU(3) breaks to the electroweak group. A variety of theories -- all sharing the same successful prediction of the weak mixing angle -- emerges; they differ primarily by the spatial location of the leptons and the absence or presence of supersymmetry. A particularly interesting theory puts leptons in a Konopinski-Mahmoud triplet and suppresses proton decay by placing quarks and leptons on opposite fixed points. |
hep-ph/9909453 | Amitava Raychaudhuri | Srubabati Goswami, Debasish Majumdar, and Amitava Raychaudhuri | Vacuum Oscillation solutions of the Solar Neutrino Problem : A status
Report | 12 pages, Latex, 4 ps figures | null | null | null | hep-ph | null | We re-examine vacuum oscillation solutions of the solar neutrino problem
taking (a) the results on total rates, electron energy spectrum, and the
seasonal variations from the 708 day SuperKamiokande data and (b) those on
total rates from the Chlorine and Gallium experiments. Best fit values for the
mixing angle and mass splitting are found for oscillations to sequential and
sterile neutrinos and the 90% C.L. allowed regions are determined.
| [
{
"created": "Tue, 21 Sep 1999 12:51:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Goswami",
"Srubabati",
""
],
[
"Majumdar",
"Debasish",
""
],
[
"Raychaudhuri",
"Amitava",
""
]
] | We re-examine vacuum oscillation solutions of the solar neutrino problem taking (a) the results on total rates, electron energy spectrum, and the seasonal variations from the 708 day SuperKamiokande data and (b) those on total rates from the Chlorine and Gallium experiments. Best fit values for the mixing angle and mass splitting are found for oscillations to sequential and sterile neutrinos and the 90% C.L. allowed regions are determined. |
hep-ph/0310354 | Helmut Satz | S. Digal, S. Fortunato, H. Satz | Predictions for J/Psi Suppression by Parton Percolation | 12 pages, 17 figures | Eur.Phys.J. C32 (2004) 547-553 | 10.1140/epjc/s2003-01519-3 | BI-TP 2003/30 | hep-ph | null | Parton percolation provides geometric deconfinement in the pre-equilibrium
stage of nuclear collisions. The resulting parton condensate can lead to
charmonium suppression. We formulate a local percolation condition viable for
non-uniform collision environments and show that it correctly reproduces the
suppression observed for S-U and Pb-Pb collisions at the SPS. Using this
formulation, we then determine the behavior of J/Psi suppression for In-In
collisions at the SPS and for Au-Au collisions at RHIC.
| [
{
"created": "Fri, 31 Oct 2003 15:31:59 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Digal",
"S.",
""
],
[
"Fortunato",
"S.",
""
],
[
"Satz",
"H.",
""
]
] | Parton percolation provides geometric deconfinement in the pre-equilibrium stage of nuclear collisions. The resulting parton condensate can lead to charmonium suppression. We formulate a local percolation condition viable for non-uniform collision environments and show that it correctly reproduces the suppression observed for S-U and Pb-Pb collisions at the SPS. Using this formulation, we then determine the behavior of J/Psi suppression for In-In collisions at the SPS and for Au-Au collisions at RHIC. |
1807.00675 | Orlando Oliveira | Orlando Oliveira, T. Frederico, W. de Paula, J. P. B. C de Melo | Exploring the Quark-Gluon Vertex with Slavnov-Taylor Identities and
Lattice Simulations | Accepted for publication on EPJC | null | 10.1140/epjc/s10052-018-6037-0 | null | hep-ph hep-lat hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The soft gluon limit of the longitudinal part of the quark-gluon vertex is
studied by resorting to non-perturbative approaches to Quantum Chromodynamics
(QCD). Based on a Slavnov-Taylor identity (STI), the longitudinal form factors
is expressed in terms of the quark-ghost kernel, the quark self energy and the
quark wave function. An exact relation between the non-vanishing longitudinal
form factors is derived for the soft gluon limit and explored to understand the
behaviour of the vertex. Within a Ball-Chiu vertex, the form factor $\lambda_1$
was analysed using recent lattice simulations for full QCD for the soft gluon
limit. The lattice data shows that the gluon propagator resumes the momentum
dependence of such component of the vertex. This connection is understood via a
fully dressed one-loop Bethe-Salpeter equation. The behaviour of the remaining
longitudinal form factors $\lambda_2(p^2)$ and $\lambda_3(p^2)$ is investigated
combining both the information of lattice simulations and the derived relations
based on the STI.
| [
{
"created": "Mon, 2 Jul 2018 14:08:11 GMT",
"version": "v1"
}
] | 2018-08-01 | [
[
"Oliveira",
"Orlando",
""
],
[
"Frederico",
"T.",
""
],
[
"de Paula",
"W.",
""
],
[
"de Melo",
"J. P. B. C",
""
]
] | The soft gluon limit of the longitudinal part of the quark-gluon vertex is studied by resorting to non-perturbative approaches to Quantum Chromodynamics (QCD). Based on a Slavnov-Taylor identity (STI), the longitudinal form factors is expressed in terms of the quark-ghost kernel, the quark self energy and the quark wave function. An exact relation between the non-vanishing longitudinal form factors is derived for the soft gluon limit and explored to understand the behaviour of the vertex. Within a Ball-Chiu vertex, the form factor $\lambda_1$ was analysed using recent lattice simulations for full QCD for the soft gluon limit. The lattice data shows that the gluon propagator resumes the momentum dependence of such component of the vertex. This connection is understood via a fully dressed one-loop Bethe-Salpeter equation. The behaviour of the remaining longitudinal form factors $\lambda_2(p^2)$ and $\lambda_3(p^2)$ is investigated combining both the information of lattice simulations and the derived relations based on the STI. |
1001.0307 | Yu-Feng Zhou | Wan-Lei Guo, Yue-Liang Wu and Yu-Feng Zhou | Exploration of decaying dark matter in a left-right symmetric model | 27 pages, 10 figures | Phys.Rev.D81:075014,2010 | 10.1103/PhysRevD.81.075014 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | $SU(2)_L$ triplet scalars appear in models motivated for the left-right
symmetry, neutrino masses and dark matter (DM), etc.. If the triplets are the
main decay products of the DM particle, and carry nonzero lepton numbers, they
may decay dominantly into lepton pairs, which can naturally explain the current
experimental results reported by PAMELA and Fermi-LAT or ATIC. We discuss this
possibility in an extended left-right symmetric model in which the decay of DM
particle is induced by tiny soft charge-conjugation ($C$) violating
interactions, and calculate the spectra for cosmic-ray positrons, neutrinos and
gamma-rays. We show that the DM signals in the flux of high energy neutrinos
can be significantly enhanced, as the triplets couple to both charged leptons
and neutrinos with the same strength. In this scenario, the predicted
neutrino-induced muon flux can be several times larger than the case in which
DM particle only directly decays into charged leptons. In addition, the charged
components of the triplet may give an extra contribution to the high energy
gamma-rays through internal bremsstrahlung process, which depends on the mass
hierarchy between the DM particle and the triplet scalars.
| [
{
"created": "Sun, 3 Jan 2010 06:57:37 GMT",
"version": "v1"
}
] | 2010-05-12 | [
[
"Guo",
"Wan-Lei",
""
],
[
"Wu",
"Yue-Liang",
""
],
[
"Zhou",
"Yu-Feng",
""
]
] | $SU(2)_L$ triplet scalars appear in models motivated for the left-right symmetry, neutrino masses and dark matter (DM), etc.. If the triplets are the main decay products of the DM particle, and carry nonzero lepton numbers, they may decay dominantly into lepton pairs, which can naturally explain the current experimental results reported by PAMELA and Fermi-LAT or ATIC. We discuss this possibility in an extended left-right symmetric model in which the decay of DM particle is induced by tiny soft charge-conjugation ($C$) violating interactions, and calculate the spectra for cosmic-ray positrons, neutrinos and gamma-rays. We show that the DM signals in the flux of high energy neutrinos can be significantly enhanced, as the triplets couple to both charged leptons and neutrinos with the same strength. In this scenario, the predicted neutrino-induced muon flux can be several times larger than the case in which DM particle only directly decays into charged leptons. In addition, the charged components of the triplet may give an extra contribution to the high energy gamma-rays through internal bremsstrahlung process, which depends on the mass hierarchy between the DM particle and the triplet scalars. |
hep-ph/0703247 | Adam Martin | Adam Martin | Higgs Cascade Decays to $\gamma\gamma + \jet \jet$ at the LHC | 8 pages, 5 figures | null | null | null | hep-ph | null | Extra light electroweak singlets can dramatically alter Higgs decays by
introducing additional decay modes, $h\to aa$. In scenarios where cascade
decays $h\to aa\to 4X, X\ne b,\bar b$ dominate, the Higgs will escape
conventional searches and may be as light as $82 \gev$. In this paper we
investigate the discovery potential of the mode $h\to aa\to 2\gamma 2g$ through
direct ($pp\to h$) and associated ($pp \to W^{\pm}h$) Higgs production at the
LHC. Our search covers all kinematically allowed singlet masses for $\sim 80
\gev \le m_h < 160 \gev$ and assumes an integrated luminosity $\CL = 300 {\rm
fb}^{-1}$. We find associated production, despite a smaller production cross
section, to be the better mode. A branching ratio $BR(h\to 2\gamma 2g) \cong
0.04$ is sufficient for discovery in the bulk of our search window. Given the
same luminosity and branching ratio 0.04, direct detection fails to discover a
Higgs anywhere in our search window. Discovery in the limited region $m_h > 120
\gev, m_a \sim 25 \gev$ is possible with direct production when the branching
ratio is $\simge 0.06$.
| [
{
"created": "Thu, 22 Mar 2007 22:06:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Martin",
"Adam",
""
]
] | Extra light electroweak singlets can dramatically alter Higgs decays by introducing additional decay modes, $h\to aa$. In scenarios where cascade decays $h\to aa\to 4X, X\ne b,\bar b$ dominate, the Higgs will escape conventional searches and may be as light as $82 \gev$. In this paper we investigate the discovery potential of the mode $h\to aa\to 2\gamma 2g$ through direct ($pp\to h$) and associated ($pp \to W^{\pm}h$) Higgs production at the LHC. Our search covers all kinematically allowed singlet masses for $\sim 80 \gev \le m_h < 160 \gev$ and assumes an integrated luminosity $\CL = 300 {\rm fb}^{-1}$. We find associated production, despite a smaller production cross section, to be the better mode. A branching ratio $BR(h\to 2\gamma 2g) \cong 0.04$ is sufficient for discovery in the bulk of our search window. Given the same luminosity and branching ratio 0.04, direct detection fails to discover a Higgs anywhere in our search window. Discovery in the limited region $m_h > 120 \gev, m_a \sim 25 \gev$ is possible with direct production when the branching ratio is $\simge 0.06$. |
hep-ph/0609165 | Yeo-Yie Charng | Yeo-Yie Charng, T. Kurimoto, Hsiang-nan Li | Gluonic contribution to $B\to \eta^{(\prime)}$ form factors | 13 pages, 9 figures, a missing overall coefficient was included into
the gluonic contribution. The numerical results were revised accordingly | Phys.Rev.D74:074024,2006; Phys.Rev.D78:059901,2008 | 10.1103/PhysRevD.74.074024 | null | hep-ph | null | We calculate the flavor-singlet contribution to the $B\to\eta^{(\prime)}$
transition form factors from the gluonic content of the $\eta^{(\prime)}$ meson
in the large-recoil region using the perturbative QCD approach. The formulation
for the $\eta$-$\eta'$ mixing in the quark-flavor and singlet-octet schemes is
compared, and employed to determine the chiral enhancement scales associated
with the two-parton twist-3 $\eta^{(\prime)}$ meson distribution amplitudes. It
is found that the gluonic contribution is negligible in the $B\to\eta$ form
factors, and reaches few percents in the $B\to\eta'$ ones. Its impact on the
accommodation of the measured $B\to\eta^{(\prime)} K$ branching ratios in the
perturbative QCD and QCD-improved factorization approaches is elaborated.
| [
{
"created": "Mon, 18 Sep 2006 06:26:05 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Nov 2006 10:07:53 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Jan 2007 12:52:02 GMT",
"version": "v3"
}
] | 2009-02-12 | [
[
"Charng",
"Yeo-Yie",
""
],
[
"Kurimoto",
"T.",
""
],
[
"Li",
"Hsiang-nan",
""
]
] | We calculate the flavor-singlet contribution to the $B\to\eta^{(\prime)}$ transition form factors from the gluonic content of the $\eta^{(\prime)}$ meson in the large-recoil region using the perturbative QCD approach. The formulation for the $\eta$-$\eta'$ mixing in the quark-flavor and singlet-octet schemes is compared, and employed to determine the chiral enhancement scales associated with the two-parton twist-3 $\eta^{(\prime)}$ meson distribution amplitudes. It is found that the gluonic contribution is negligible in the $B\to\eta$ form factors, and reaches few percents in the $B\to\eta'$ ones. Its impact on the accommodation of the measured $B\to\eta^{(\prime)} K$ branching ratios in the perturbative QCD and QCD-improved factorization approaches is elaborated. |
2104.04456 | T\'essio B. De Melo | Giorgio Arcadi, \'Alvaro S. de Jesus, T\'essio B. de Melo, Farinaldo
S. Queiroz, Yoxara S. Villamizar | A 2HDM for the g-2 and Dark Matter | 9 pages, 8 figures. Text improved. Bounds from parity violation
experiments included. Expanded discussion. References added | null | 10.1016/j.nuclphysb.2022.115882 | IIP-2021 | hep-ph hep-ex | http://creativecommons.org/licenses/by-sa/4.0/ | The Muon g-2 experiment at FERMILAB has confirmed the muon anomalous magnetic
moment anomaly with an error bar 15% smaller and a different central value
compared with the previous Brookhaven result. The combined results from
FERMILAB and Brookhaven show a difference with theory at a significance of
$4.2\sigma$, strongly indicating the presence of new physics. In light of this
new result, we discuss a Two Higgs Doublet model augmented by an Abelian gauge
symmetry that can simultaneously accommodate a light dark matter candidate and
$(g-2)_\mu$, in agreement with existing bounds.
| [
{
"created": "Fri, 9 Apr 2021 16:06:25 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Feb 2022 02:09:54 GMT",
"version": "v2"
}
] | 2022-08-17 | [
[
"Arcadi",
"Giorgio",
""
],
[
"de Jesus",
"Álvaro S.",
""
],
[
"de Melo",
"Téssio B.",
""
],
[
"Queiroz",
"Farinaldo S.",
""
],
[
"Villamizar",
"Yoxara S.",
""
]
] | The Muon g-2 experiment at FERMILAB has confirmed the muon anomalous magnetic moment anomaly with an error bar 15% smaller and a different central value compared with the previous Brookhaven result. The combined results from FERMILAB and Brookhaven show a difference with theory at a significance of $4.2\sigma$, strongly indicating the presence of new physics. In light of this new result, we discuss a Two Higgs Doublet model augmented by an Abelian gauge symmetry that can simultaneously accommodate a light dark matter candidate and $(g-2)_\mu$, in agreement with existing bounds. |
hep-ph/0502015 | Jianwei Mei | Jianwei Mei | Running Neutrino Masses, Leptonic Mixing Angles and CP-Violating Phases:
From $M_{\rm Z}$ to $\Lambda_{\rm GUT}$ | 45 pages, 2 tables, 10 figures; a misplaced graph in Figure 6
corrected | Phys.Rev. D71 (2005) 073012 | 10.1103/PhysRevD.71.073012 | null | hep-ph | null | We derive renormalization group equations for neutrino masses, leptonic
mixing angles and CP-violating phases running at energies above the seesaw
threshold, both in the Standard Model and in the Minimal Supersymmetric
Standard Model extended with three right-handed neutrinos. With these
equations, we carry out a systematic study of the radiative correction that may
arise to neutrino parameters, via their renormalization group evolution from
the electroweak scale ($M_{\rm Z}$) to the scale of Grand Unified theories
($\Lambda_{\rm GUT}$). We study in detail three typically interesting neutrino
mass patterns: normal hierarchy, near degeneracy and inverted hierarchy.
Magnitudes of possible corrections in each case are carefully investigated. We
also emphasize the significance of CP-violating phases in controlling the
evolution behavior of all neutrino parameters.
| [
{
"created": "Wed, 2 Feb 2005 06:07:47 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Mar 2005 13:18:23 GMT",
"version": "v2"
},
{
"created": "Fri, 25 Mar 2005 13:54:29 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Mei",
"Jianwei",
""
]
] | We derive renormalization group equations for neutrino masses, leptonic mixing angles and CP-violating phases running at energies above the seesaw threshold, both in the Standard Model and in the Minimal Supersymmetric Standard Model extended with three right-handed neutrinos. With these equations, we carry out a systematic study of the radiative correction that may arise to neutrino parameters, via their renormalization group evolution from the electroweak scale ($M_{\rm Z}$) to the scale of Grand Unified theories ($\Lambda_{\rm GUT}$). We study in detail three typically interesting neutrino mass patterns: normal hierarchy, near degeneracy and inverted hierarchy. Magnitudes of possible corrections in each case are carefully investigated. We also emphasize the significance of CP-violating phases in controlling the evolution behavior of all neutrino parameters. |
hep-ph/0610329 | Jonghun Jeon | S. Baek, J. H. Jeon, C. S. Kim (Yonsei U.), and Chaehyun Yu (korea U.) | Electroweak Penguin and Leptophobic $Z^\prime$ model | Talk given at Summer Institute 2006, APCTP Pohang Korea, August
23-30, 2006, 5 pages, 4 figures, LateX | null | null | null | hep-ph | null | We consider the leptophobic $Z^\prime$ model which can appear naturally in
the flipped SU(5) or string-inspired $E_6$ models. This model can be
constrained by measurements of the $B\to M \nu\bar{\nu}$ decays and $\Delta
m_s$. We find that although the latter give much stronger constraints on the
coupling than the former, they are complementary to each other.
| [
{
"created": "Wed, 25 Oct 2006 09:06:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Baek",
"S.",
"",
"Yonsei U."
],
[
"Jeon",
"J. H.",
"",
"Yonsei U."
],
[
"Kim",
"C. S.",
"",
"Yonsei U."
],
[
"Yu",
"Chaehyun",
"",
"korea U."
]
] | We consider the leptophobic $Z^\prime$ model which can appear naturally in the flipped SU(5) or string-inspired $E_6$ models. This model can be constrained by measurements of the $B\to M \nu\bar{\nu}$ decays and $\Delta m_s$. We find that although the latter give much stronger constraints on the coupling than the former, they are complementary to each other. |
hep-ph/0106170 | Manmohan Gupta | Manmohan Gupta and Harleen Dahiya | What is inside the nucleon? | LateX, 23 pages, 3 figures and 5 Tables | null | null | null | hep-ph | null | We briefly review the structure of nucleon in the context of QCD, Constituent
Quark Model and Chiral Quark Model.
| [
{
"created": "Fri, 15 Jun 2001 12:05:01 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gupta",
"Manmohan",
""
],
[
"Dahiya",
"Harleen",
""
]
] | We briefly review the structure of nucleon in the context of QCD, Constituent Quark Model and Chiral Quark Model. |
hep-ph/0012257 | Wayne W. Repko | Ali Abbasabadi, Alberto Devoto and Wayne W. Repko | High energy photon-neutrino elastic scattering | 9 pages, 7 figures, RevTeX4 | Phys.Rev.D63:093001,2001 | 10.1103/PhysRevD.63.093001 | null | hep-ph | null | The one-loop helicity amplitudes for the elastic scattering process
$\gamma\nu\to\gamma\nu$ in the Standard Model are computed at high center of
mass energies. A general decomposition of the amplitudes is utilized to
investigate the validity of some of the key features of our results. In the
center of mass, where $\sqrt{s} = 2\omega$, the cross section grows roughly as
$\omega^6$ to near the threshold for $W$-boson production, $\sqrt{s} = m_W$.
Although suppressed at low energies, we find that the elastic cross section
exceeds the cross section for $\gamma\nu\to\gamma\gamma\nu$ when $\sqrt{s}>13 $
GeV. We demonstrate that the scattered photons are circularly polarized and the
net value of the polarization is non-zero. Astrophysical implications of high
energy photon-neutrino scattering are discussed.
| [
{
"created": "Tue, 19 Dec 2000 21:12:05 GMT",
"version": "v1"
}
] | 2009-12-31 | [
[
"Abbasabadi",
"Ali",
""
],
[
"Devoto",
"Alberto",
""
],
[
"Repko",
"Wayne W.",
""
]
] | The one-loop helicity amplitudes for the elastic scattering process $\gamma\nu\to\gamma\nu$ in the Standard Model are computed at high center of mass energies. A general decomposition of the amplitudes is utilized to investigate the validity of some of the key features of our results. In the center of mass, where $\sqrt{s} = 2\omega$, the cross section grows roughly as $\omega^6$ to near the threshold for $W$-boson production, $\sqrt{s} = m_W$. Although suppressed at low energies, we find that the elastic cross section exceeds the cross section for $\gamma\nu\to\gamma\gamma\nu$ when $\sqrt{s}>13 $ GeV. We demonstrate that the scattered photons are circularly polarized and the net value of the polarization is non-zero. Astrophysical implications of high energy photon-neutrino scattering are discussed. |
1105.1808 | Boris Kayser | Gino Segre and Boris Kayser | A Scalar Doublet at the Tevatron? | LaTeX, 5 pages | null | null | FERMILAB-PUB-11-211-T | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a particularly simple explanation of the W+dijet excess reported
by the CDF collaboration. No symmetries beyond those of the standard model are
necessary, and the only new particles involved are a spin-zero weak SU(2)
doublet with no vacuum expectation value. Possible tests of the model and
comparisons to other proposals are discussed.
| [
{
"created": "Mon, 9 May 2011 22:19:18 GMT",
"version": "v1"
}
] | 2011-05-11 | [
[
"Segre",
"Gino",
""
],
[
"Kayser",
"Boris",
""
]
] | We propose a particularly simple explanation of the W+dijet excess reported by the CDF collaboration. No symmetries beyond those of the standard model are necessary, and the only new particles involved are a spin-zero weak SU(2) doublet with no vacuum expectation value. Possible tests of the model and comparisons to other proposals are discussed. |
1112.6259 | Jian Tang | Jian Tang | Phenomenology of Neutrino Oscillations at the Neutrino Factory | 4 pages, 3 figures, proceedings for TAUP2011 | null | 10.1088/1742-6596/375/1/042075 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the prospects for a neutrino factory to measure mixing angles,
the CP violating phase and mass-squared differences by detecting wrong-charged
muons arising from the chain \mu^+ to \nu_e to \nu_\mu\ to \mu^- and the
right-charged muons coming from the chain \mu^+ to \bar{\nu}_\mu\ to
\bar{\nu}_\mu\ to \mu^+ (similar to \mu^- chains), where \nu_e to \nu_\mu\ and
\bar{\nu}_\mu\ to \bar{\nu}_\mu\ are neutrino oscillation channels through a
long baseline. First, we perform the baseline and energy optimization of the
neutrino factory including the latest simulation results from the magnetized
iron neutrino detector (MIND). Second, we study physics with near detectors and
consider the treatment of systematic errors including cross section errors,
flux errors, and background uncertainties. Third, the effects of one additional
massive sterile neutrino are investigated in the context of near and far
detector combinations.
| [
{
"created": "Thu, 29 Dec 2011 09:45:15 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Tang",
"Jian",
""
]
] | We consider the prospects for a neutrino factory to measure mixing angles, the CP violating phase and mass-squared differences by detecting wrong-charged muons arising from the chain \mu^+ to \nu_e to \nu_\mu\ to \mu^- and the right-charged muons coming from the chain \mu^+ to \bar{\nu}_\mu\ to \bar{\nu}_\mu\ to \mu^+ (similar to \mu^- chains), where \nu_e to \nu_\mu\ and \bar{\nu}_\mu\ to \bar{\nu}_\mu\ are neutrino oscillation channels through a long baseline. First, we perform the baseline and energy optimization of the neutrino factory including the latest simulation results from the magnetized iron neutrino detector (MIND). Second, we study physics with near detectors and consider the treatment of systematic errors including cross section errors, flux errors, and background uncertainties. Third, the effects of one additional massive sterile neutrino are investigated in the context of near and far detector combinations. |
hep-ph/0007033 | Efrain J. Ferrer | E. Elizalde, E. J. Ferrer and V. de la Incera | Neutrino Self-Energy and Index of Refraction in Strong Magnetic Field: A
New Approach | latex, 26 pages, 1 figure. Discussion section redone | Annals Phys. 295 (2002) 33-49 | 10.1006/aphy.2001.6203 | null | hep-ph | null | The Ritus' $E_{p}$ eigenfunction method is extended to the case of spin-1
charged particles in a constant electromagnetic field and used to calculate the
one-loop neutrino self-energy in the presence of a strong magnetic field.From
the obtained self-energy, the neutrino dispersion relation and index of
refraction in the magnetized vacuum are determined within the field range
$m_{e}^{2}\ll eB\ll M_{W}^{2}$. The propagation of neutrinos in the magnetized
vacuum is anisotropic due to the dependence of the index of refraction on the
angle between the directions of the neutrino momentum and the external field.
Possible cosmological implications of the results are discussed.
| [
{
"created": "Tue, 4 Jul 2000 18:45:42 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Jan 2001 17:33:35 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Jan 2002 17:42:55 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Elizalde",
"E.",
""
],
[
"Ferrer",
"E. J.",
""
],
[
"de la Incera",
"V.",
""
]
] | The Ritus' $E_{p}$ eigenfunction method is extended to the case of spin-1 charged particles in a constant electromagnetic field and used to calculate the one-loop neutrino self-energy in the presence of a strong magnetic field.From the obtained self-energy, the neutrino dispersion relation and index of refraction in the magnetized vacuum are determined within the field range $m_{e}^{2}\ll eB\ll M_{W}^{2}$. The propagation of neutrinos in the magnetized vacuum is anisotropic due to the dependence of the index of refraction on the angle between the directions of the neutrino momentum and the external field. Possible cosmological implications of the results are discussed. |
2003.08511 | Eligio Lisi | Francesco Capozzi, Eleonora Di Valentino, Eligio Lisi, Antonio
Marrone, Alessandro Melchiorri, Antonio Palazzo | Addendum to: Global constraints on absolute neutrino masses and their
ordering | 10 pages, including 3 tables and 5 figures. Text clarified,
references added, results unchanged. To appear in PRD | Phys. Rev. D 101, 116013 (2020) | 10.1103/PhysRevD.101.116013 | MPP-2020-30 | hep-ph astro-ph.CO hep-ex nucl-ex | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit our previous work [Phys. Rev. D 95, 096014 (2017)] where neutrino
oscillation and nonoscillation data were analyzed in the standard framework
with three neutrino families, in order to constrain their absolute masses and
to probe their ordering (either normal, NO, or inverted, IO). We include
updated oscillation results to discuss best fits and allowed ranges for the two
squared mass differences $\delta m^2$ and $\Delta m^2$, the three mixing angles
$\theta_{12}$, $\theta_{23}$ and $\theta_{13}$, as well as constraints on the
CP-violating phase $\delta$, plus significant indications in favor of NO vs IO
at the level of $\Delta\chi^2=10.0$. We then consider nonoscillation data from
beta decay, from neutrinoless double beta decay (if neutrinos are Majorana),
and from various cosmological input variants (in the data or the model) leading
to results dubbed as default, aggressive, and conservative. In the default
option, we obtain from nonoscillation data an extra contribution $\Delta\chi^2
= 2.2$ in favor of NO, and an upper bound on the sum of neutrino masses $\Sigma
< 0.15$ eV at $2\sigma$; both results - dominated by cosmology - can be
strengthened or weakened by using more aggressive or conservative options,
respectively. Taking into account such variations, we find that the combination
of all (oscillation and nonoscillation) neutrino data favors NO at the level of
$3.2-3.7\sigma$, and that $\Sigma$ is constrained at the $2\sigma$ level within
$\Sigma < 0.12-0.69$ eV. The upper edge of this allowed range corresponds to an
effective $\beta$-decay neutrino mass $m_\beta = \Sigma/3 = 0.23$ eV, at the
sensitivity frontier of the KATRIN experiment.
| [
{
"created": "Wed, 18 Mar 2020 23:49:32 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Jun 2020 20:10:27 GMT",
"version": "v2"
}
] | 2020-07-01 | [
[
"Capozzi",
"Francesco",
""
],
[
"Di Valentino",
"Eleonora",
""
],
[
"Lisi",
"Eligio",
""
],
[
"Marrone",
"Antonio",
""
],
[
"Melchiorri",
"Alessandro",
""
],
[
"Palazzo",
"Antonio",
""
]
] | We revisit our previous work [Phys. Rev. D 95, 096014 (2017)] where neutrino oscillation and nonoscillation data were analyzed in the standard framework with three neutrino families, in order to constrain their absolute masses and to probe their ordering (either normal, NO, or inverted, IO). We include updated oscillation results to discuss best fits and allowed ranges for the two squared mass differences $\delta m^2$ and $\Delta m^2$, the three mixing angles $\theta_{12}$, $\theta_{23}$ and $\theta_{13}$, as well as constraints on the CP-violating phase $\delta$, plus significant indications in favor of NO vs IO at the level of $\Delta\chi^2=10.0$. We then consider nonoscillation data from beta decay, from neutrinoless double beta decay (if neutrinos are Majorana), and from various cosmological input variants (in the data or the model) leading to results dubbed as default, aggressive, and conservative. In the default option, we obtain from nonoscillation data an extra contribution $\Delta\chi^2 = 2.2$ in favor of NO, and an upper bound on the sum of neutrino masses $\Sigma < 0.15$ eV at $2\sigma$; both results - dominated by cosmology - can be strengthened or weakened by using more aggressive or conservative options, respectively. Taking into account such variations, we find that the combination of all (oscillation and nonoscillation) neutrino data favors NO at the level of $3.2-3.7\sigma$, and that $\Sigma$ is constrained at the $2\sigma$ level within $\Sigma < 0.12-0.69$ eV. The upper edge of this allowed range corresponds to an effective $\beta$-decay neutrino mass $m_\beta = \Sigma/3 = 0.23$ eV, at the sensitivity frontier of the KATRIN experiment. |
hep-ph/0508071 | Gino Isidori | Elisabetta Baracchini, Gino Isidori | Electromagnetic corrections to non-leptonic two-body B and D decays | 8 pages, 2 figures | Phys.Lett. B633 (2006) 309-313 | 10.1016/j.physletb.2005.11.072 | null | hep-ph | null | We present analytic expressions to evaluate at O(alpha) the effects of
soft-photon emission, and the related virtual corrections, in non-leptonic
decays of the type B,D -> P1 P2, where P1 and P2 are scalar or pseudoscalar
particles. The phenomenological implications of these results are briefly
discussed. For B decays into charged pions the effects of soft-photon emission
are quite large: the corrections to the rates can easily exceed the 5% level if
tight cuts on the photon energy are applied.
| [
{
"created": "Fri, 5 Aug 2005 10:30:02 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Baracchini",
"Elisabetta",
""
],
[
"Isidori",
"Gino",
""
]
] | We present analytic expressions to evaluate at O(alpha) the effects of soft-photon emission, and the related virtual corrections, in non-leptonic decays of the type B,D -> P1 P2, where P1 and P2 are scalar or pseudoscalar particles. The phenomenological implications of these results are briefly discussed. For B decays into charged pions the effects of soft-photon emission are quite large: the corrections to the rates can easily exceed the 5% level if tight cuts on the photon energy are applied. |
1909.11949 | Mykhailo Konchatnij | G.I. Gakh, M.I. Konchatnij and N.P. Merenkov | About The Polarized $\tau$ Lepton Radiative Decay | 20 pages, 5 figures | IJMPA, Vol.A34, No28 (2019)1950162 | 10.1142/S0217751X19501628 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The polarization effects in the one-meson radiative decay of the polarized
$\tau$ lepton, $\tau^-\to\pi^-\gamma\nu_{\tau}$, have been investigated. We
present the analytical results for the $t-$distribution of the partial
differential widths, which responsible for different polarization phenomena, in
the case of the photon energy cut: $\omega>X$. These quantities depend on the
invariant mass squared $t$ of the pseudoscalar meson and photon and the photon
energy cut $X.$ Our analytical formulae, in terms of the weak vector and
axial-vector form factors, describing the structure-dependent part of the decay
amplitude, are valid also for the decay $\tau^{\pm}\to
K^{\pm}\,\nu_\tau\,\gamma$ after trivial substitutions of the corresponding
constants. We demonstrate the essential decrease of the inner bremsstrahlung
contribution in comparison with the structural one with increase of the photon
cut energy. In numerical calculations the vector and axial-vector form factors
are determined using the chiral effective theory with resonances (R$\chi$T).
| [
{
"created": "Thu, 26 Sep 2019 07:28:14 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Nov 2019 08:56:29 GMT",
"version": "v2"
}
] | 2019-11-12 | [
[
"Gakh",
"G. I.",
""
],
[
"Konchatnij",
"M. I.",
""
],
[
"Merenkov",
"N. P.",
""
]
] | The polarization effects in the one-meson radiative decay of the polarized $\tau$ lepton, $\tau^-\to\pi^-\gamma\nu_{\tau}$, have been investigated. We present the analytical results for the $t-$distribution of the partial differential widths, which responsible for different polarization phenomena, in the case of the photon energy cut: $\omega>X$. These quantities depend on the invariant mass squared $t$ of the pseudoscalar meson and photon and the photon energy cut $X.$ Our analytical formulae, in terms of the weak vector and axial-vector form factors, describing the structure-dependent part of the decay amplitude, are valid also for the decay $\tau^{\pm}\to K^{\pm}\,\nu_\tau\,\gamma$ after trivial substitutions of the corresponding constants. We demonstrate the essential decrease of the inner bremsstrahlung contribution in comparison with the structural one with increase of the photon cut energy. In numerical calculations the vector and axial-vector form factors are determined using the chiral effective theory with resonances (R$\chi$T). |
1209.4866 | Ivone F. M. Albuquerque | Ivone F. M. Albuquerque, Jairo Cavalcante de Souza | Indirect Probes of Supersymmetry Breaking in the JEM-EUSO Observatory | 7 pages, 9 figures; version approved for publication | null | 10.1103/PhysRevD.87.015018 | null | hep-ph astro-ph.HE hep-ex | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we propose indirect probes of the scale of supersymmetry
breaking, through observations in the Extreme Universe Space Observatory
onboard Japanese Experiment Module (JEM-EUSO). We consider scenarios where the
lightest supersymmetric particle is the gravitino, and the next to lightest
(NLSP) is a long lived slepton. We demonstrate that JEM-EUSO will be able to
probe models where the NLSP decays, therefore probing supersymmetric breaking
scales below $5 \times 10^6$ GeV. The observatory field of view will be large
enough to detect a few tens of events per year, depending on its energy
threshold. This is complementary to a previous proposal (Albuquerque et al.,
2004) where it was shown that 1 Km$^3$ neutrino telescopes can directly probe
this scale. NLSPs will be produced by the interaction of high energy neutrinos
in the Earth. Here we investigate scenarios where they subsequently decay,
either in the atmosphere after escaping the Earth or right before leaving the
Earth, producing taus. These can be detected by JEM-EUSO and have two
distinctive signatures: one, they are produced in the Earth and go upwards in
the atmosphere, which allows discrimination from atmospheric taus and, second,
as NLSPs are always produced in pairs, coincident taus will be a strong
signature for these events. Assuming that the neutrino flux is equivalent to
the Waxman-Bahcall limit, we determine the rate of taus from NLSP decays
reaching JEM-EUSO's field of view.
| [
{
"created": "Fri, 21 Sep 2012 17:28:22 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Jan 2013 14:04:29 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Albuquerque",
"Ivone F. M.",
""
],
[
"de Souza",
"Jairo Cavalcante",
""
]
] | In this paper we propose indirect probes of the scale of supersymmetry breaking, through observations in the Extreme Universe Space Observatory onboard Japanese Experiment Module (JEM-EUSO). We consider scenarios where the lightest supersymmetric particle is the gravitino, and the next to lightest (NLSP) is a long lived slepton. We demonstrate that JEM-EUSO will be able to probe models where the NLSP decays, therefore probing supersymmetric breaking scales below $5 \times 10^6$ GeV. The observatory field of view will be large enough to detect a few tens of events per year, depending on its energy threshold. This is complementary to a previous proposal (Albuquerque et al., 2004) where it was shown that 1 Km$^3$ neutrino telescopes can directly probe this scale. NLSPs will be produced by the interaction of high energy neutrinos in the Earth. Here we investigate scenarios where they subsequently decay, either in the atmosphere after escaping the Earth or right before leaving the Earth, producing taus. These can be detected by JEM-EUSO and have two distinctive signatures: one, they are produced in the Earth and go upwards in the atmosphere, which allows discrimination from atmospheric taus and, second, as NLSPs are always produced in pairs, coincident taus will be a strong signature for these events. Assuming that the neutrino flux is equivalent to the Waxman-Bahcall limit, we determine the rate of taus from NLSP decays reaching JEM-EUSO's field of view. |
hep-ph/9712541 | null | David Tung and Hsiang-nan Li | Perturbative pion form factor reexamined | 16 pages in Latex file | Chin.J.Phys. 35 (1997) 651-662 | null | CCUTH-97-06 | hep-ph | null | We recalculate the pion electromagnetic form factor based on the perturbative
QCD formalism that includes the Sudakov resummation. We take into account the
evolution of the pion wave function in $b$, which represents the transverse
extent of the pion. An infrared enhancement is observed when $1/b$ approaches
$\Lambda_{QCD}$. We propose to freeze the evolution of the wave function at
some scale above $\Lambda_{QCD}$, such that perturbative contributions are
stablized. Our predictions are consistent with experimental data, and
insensitive to the variation of relevant parameters.
| [
{
"created": "Tue, 30 Dec 1997 04:32:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Tung",
"David",
""
],
[
"Li",
"Hsiang-nan",
""
]
] | We recalculate the pion electromagnetic form factor based on the perturbative QCD formalism that includes the Sudakov resummation. We take into account the evolution of the pion wave function in $b$, which represents the transverse extent of the pion. An infrared enhancement is observed when $1/b$ approaches $\Lambda_{QCD}$. We propose to freeze the evolution of the wave function at some scale above $\Lambda_{QCD}$, such that perturbative contributions are stablized. Our predictions are consistent with experimental data, and insensitive to the variation of relevant parameters. |
hep-ph/0411291 | B. L. G. Bakker | A.M. Badalian and A.I. Veselov (Institute of Theoretical and
Experimental Physics.Moscow, Russia), and B.L.G. Bakker (Vrije Universiteit,
Department of Physics, Amsterdam, The Netherlands) | Leptonic widths of high excitations in heavy quarkonia | 11 pages revtex4 | J.Phys.G31:417-426,2005 | 10.1088/0954-3899/31/5/012 | null | hep-ph hep-ex | null | Agreement with the measured electronic widths of the $\psi(4040)$,
$\psi(4415)$, and $\Upsilon (11019)$ resonances is shown to be reached if two
effects are taken into account: a flattening of the confining potential at
large distances and a total screening of the gluon-exchange interaction at
$r\ga 1.2$ fm. The leptonic widths of the unobserved $\Upsilon(7S)$ and
$\psi(5S)$ resonances: $\Gamma_{e^+e^-}(\Upsilon (7S))=0.11$ keV and
$\Gamma(\psi(5S))\approx 0.54$ keV are predicted.
| [
{
"created": "Mon, 22 Nov 2004 13:02:04 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Badalian",
"A. M.",
"",
"Institute of Theoretical and\n Experimental Physics.Moscow, Russia"
],
[
"Veselov",
"A. I.",
"",
"Institute of Theoretical and\n Experimental Physics.Moscow, Russia"
],
[
"Bakker",
"B. L. G.",
"",
"Vrije Universiteit,\n Department of Physics, Amsterdam, The Netherlands"
]
] | Agreement with the measured electronic widths of the $\psi(4040)$, $\psi(4415)$, and $\Upsilon (11019)$ resonances is shown to be reached if two effects are taken into account: a flattening of the confining potential at large distances and a total screening of the gluon-exchange interaction at $r\ga 1.2$ fm. The leptonic widths of the unobserved $\Upsilon(7S)$ and $\psi(5S)$ resonances: $\Gamma_{e^+e^-}(\Upsilon (7S))=0.11$ keV and $\Gamma(\psi(5S))\approx 0.54$ keV are predicted. |
2004.07318 | Tamas Cs\"org\H{o} | T. Cs\"org\H{o}, T. Nov\'ak, R. Pasechnik, A. Ster and I. Szanyi | Scaling of high-energy elastic scattering and the observation of Odderon | 11 pages, 2 figures, theoretical results added to Figs. 1 and 2,
discussion improved, connection to elastic scattering pp measurements at RHIC
added, conclusions and Odderon significance unchanged | Gribov-90 Memorial Volume, pp. 69-80 (2021) (World Scientific,
Singapore, ed. Yu. Dokshitzer, P. L\'evai, \'A. Luk\'acs and J. Nyiri) | 10.1142/9789811238406_0012 | null | hep-ph hep-ex nucl-ex | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a statistically significant observation of the elusive Odderon
exchange, based on novel and model-independent analysis of the scaling
properties of the differential cross sections of elastic $pp$ and $p\bar p$
scattering in the TeV energy range. We report the statistical significance of
the observed Odderon signal at the level of 6.26$\sigma$.
| [
{
"created": "Wed, 15 Apr 2020 20:08:44 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Oct 2020 19:37:48 GMT",
"version": "v2"
}
] | 2021-06-01 | [
[
"Csörgő",
"T.",
""
],
[
"Novák",
"T.",
""
],
[
"Pasechnik",
"R.",
""
],
[
"Ster",
"A.",
""
],
[
"Szanyi",
"I.",
""
]
] | We provide a statistically significant observation of the elusive Odderon exchange, based on novel and model-independent analysis of the scaling properties of the differential cross sections of elastic $pp$ and $p\bar p$ scattering in the TeV energy range. We report the statistical significance of the observed Odderon signal at the level of 6.26$\sigma$. |
hep-ph/0002296 | Yasuhiro Okada | Yasuhiro Okada (KEK) | Manifestaion of SUSY in B decays | 7 pages, 2 figures, talk given at the Third International Conference
on B Physics and CP Violation, December 3 -7, 1999, Taipei | null | 10.1142/9789812791870_0068 | KEK-TH-680 | hep-ph | null | SUSY effects on various flavor changing neutral current processes are
discussed in the minimal supergravity model and the SU(5) grand unified theory
with right-handed neutrino supermultiplets. In particular, in the latter case
the neutrino Yukawa coupling constants can be a source of the flavor mixing in
the right-handed-down-type-squark sector. It is shown that due to this mixing
the time-dependent CP asymmetry of radiative B decay can be as large as 30% and
the ratio of $B_s$-$\bar{B}_s$ mixing and $B_d$-$\bar{B}_d$ mixing deviates
from the prediction in the standard model and the minimal supergravity model
without the neutrino interaction.
| [
{
"created": "Tue, 29 Feb 2000 06:46:51 GMT",
"version": "v1"
}
] | 2016-11-23 | [
[
"Okada",
"Yasuhiro",
"",
"KEK"
]
] | SUSY effects on various flavor changing neutral current processes are discussed in the minimal supergravity model and the SU(5) grand unified theory with right-handed neutrino supermultiplets. In particular, in the latter case the neutrino Yukawa coupling constants can be a source of the flavor mixing in the right-handed-down-type-squark sector. It is shown that due to this mixing the time-dependent CP asymmetry of radiative B decay can be as large as 30% and the ratio of $B_s$-$\bar{B}_s$ mixing and $B_d$-$\bar{B}_d$ mixing deviates from the prediction in the standard model and the minimal supergravity model without the neutrino interaction. |
1005.5160 | Fabrizio Nesti | Alessio Maiezza, Miha Nemevsek, Fabrizio Nesti, Goran Senjanovic | Left-Right Symmetry at LHC | 32 pages | Phys.Rev.D82:055022,2010 | 10.1103/PhysRevD.82.055022 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the issue of the limit on the scale of Left-Right symmetry
breaking. We focus on the minimal SU(2)_L x SU(2)_R x U(1)_B-L gauge theory
with the seesaw mechanism and discuss the two possibilities of defining
Left-Right symmetry as parity or charge conjugation. In the commonly adopted
case of parity, we perform a complete numerical study of the quark mass
matrices and the associated left and right mixing matrices without any
assumptions usually made in the literature about the ratio of vacuum
expectation values. We find that the usual lower limit on the mass of the
right-handed gauge boson from the K mass difference, M_WR>2.5TeV, is subject to
a possible small reduction due to the difference between right and left Cabibbo
angles. In the case of charge conjugation the limit on M_WR is somewhat more
robust. However, the more severe bounds from CP-violating observables are
absent in this case. In fact, the free phases can also resolve the present mild
discrepancy between the Standard Model and CP-violation in the $B$-sector.
Thus, even in the minimal case, both charged and neutral gauge bosons may be
accessible at the Large Hadron Collider with spectacular signatures of lepton
number violation.
| [
{
"created": "Thu, 27 May 2010 19:55:47 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Maiezza",
"Alessio",
""
],
[
"Nemevsek",
"Miha",
""
],
[
"Nesti",
"Fabrizio",
""
],
[
"Senjanovic",
"Goran",
""
]
] | We revisit the issue of the limit on the scale of Left-Right symmetry breaking. We focus on the minimal SU(2)_L x SU(2)_R x U(1)_B-L gauge theory with the seesaw mechanism and discuss the two possibilities of defining Left-Right symmetry as parity or charge conjugation. In the commonly adopted case of parity, we perform a complete numerical study of the quark mass matrices and the associated left and right mixing matrices without any assumptions usually made in the literature about the ratio of vacuum expectation values. We find that the usual lower limit on the mass of the right-handed gauge boson from the K mass difference, M_WR>2.5TeV, is subject to a possible small reduction due to the difference between right and left Cabibbo angles. In the case of charge conjugation the limit on M_WR is somewhat more robust. However, the more severe bounds from CP-violating observables are absent in this case. In fact, the free phases can also resolve the present mild discrepancy between the Standard Model and CP-violation in the $B$-sector. Thus, even in the minimal case, both charged and neutral gauge bosons may be accessible at the Large Hadron Collider with spectacular signatures of lepton number violation. |
2305.05879 | Michael Trott | Adam Martin and Michael Trott | More accurate $\sigma(\mathcal{G} \,\mathcal{G}\rightarrow h)$,
$\Gamma(h \rightarrow \mathcal{G} \,\mathcal{G}, \mathcal{A} \mathcal{A},
\bar{\Psi} {\Psi})$ and Higgs width results via the geoSMEFT | 27 pages + appendix v3: minor typo corrections, final JHEP version | null | null | null | hep-ph | http://creativecommons.org/licenses/by/4.0/ | We develop Standard Model Effective Field Theory (SMEFT) predictions of
$\sigma(\mathcal{G} \,\mathcal{G}\rightarrow h)$, $\Gamma(h \rightarrow
\mathcal{G} \,\mathcal{G})$, $\Gamma(h \rightarrow \mathcal{A} \mathcal{A})$ to
incorporate full two loop Standard Model results at the amplitude level, in
conjunction with dimension eight SMEFT corrections. We simultaneously report
consistent $\Gamma(h \rightarrow \bar{\Psi} {\Psi})$ results including leading
QCD corrections and dimension eight SMEFT corrections. This extends the
predictions of the former processes $\Gamma, \sigma$ to a full set of
corrections at $\mathcal{O}(\bar{v}_T^2/\Lambda^2 (16 \pi^2)^2)$ and
$\mathcal{O}(\bar{v}_T^4/\Lambda^4)$, where $\bar{v}_T$ is the electroweak
scale vacuum expectation value and $\Lambda$ is the cut off scale of the SMEFT.
Throughout, cross consistency between the operator and loop expansions is
maintained by the use of the geometric SMEFT formalism. For $\Gamma(h
\rightarrow \bar{\Psi} {\Psi})$, we include results at
$\mathcal{O}(\bar{v}_T^2/\Lambda^2 (16 \pi^2))$ in the limit where subleading
$m_\Psi \rightarrow 0$ corrections are neglected. We clarify how gauge
invariant SMEFT renormalization counterterms combine with the Standard Model
counter terms in higher order SMEFT calculations when the Background Field
Method is used. We also update the prediction of the total Higgs width in the
SMEFT to consistently include some of these higher order perturbative effects.
| [
{
"created": "Wed, 10 May 2023 03:55:13 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Sep 2023 13:52:35 GMT",
"version": "v2"
},
{
"created": "Fri, 13 Oct 2023 10:35:18 GMT",
"version": "v3"
}
] | 2023-10-16 | [
[
"Martin",
"Adam",
""
],
[
"Trott",
"Michael",
""
]
] | We develop Standard Model Effective Field Theory (SMEFT) predictions of $\sigma(\mathcal{G} \,\mathcal{G}\rightarrow h)$, $\Gamma(h \rightarrow \mathcal{G} \,\mathcal{G})$, $\Gamma(h \rightarrow \mathcal{A} \mathcal{A})$ to incorporate full two loop Standard Model results at the amplitude level, in conjunction with dimension eight SMEFT corrections. We simultaneously report consistent $\Gamma(h \rightarrow \bar{\Psi} {\Psi})$ results including leading QCD corrections and dimension eight SMEFT corrections. This extends the predictions of the former processes $\Gamma, \sigma$ to a full set of corrections at $\mathcal{O}(\bar{v}_T^2/\Lambda^2 (16 \pi^2)^2)$ and $\mathcal{O}(\bar{v}_T^4/\Lambda^4)$, where $\bar{v}_T$ is the electroweak scale vacuum expectation value and $\Lambda$ is the cut off scale of the SMEFT. Throughout, cross consistency between the operator and loop expansions is maintained by the use of the geometric SMEFT formalism. For $\Gamma(h \rightarrow \bar{\Psi} {\Psi})$, we include results at $\mathcal{O}(\bar{v}_T^2/\Lambda^2 (16 \pi^2))$ in the limit where subleading $m_\Psi \rightarrow 0$ corrections are neglected. We clarify how gauge invariant SMEFT renormalization counterterms combine with the Standard Model counter terms in higher order SMEFT calculations when the Background Field Method is used. We also update the prediction of the total Higgs width in the SMEFT to consistently include some of these higher order perturbative effects. |
hep-ph/0009269 | Lisi Eligio | G.L. Fogli (Bari U. & INFN), E. Lisi (Bari U. & INFN), A. Marrone
(Bari U. & INFN), D. Montanino (U. of Lecce) | Analysis of oscillations of atmospheric neutrinos | Talk at the 19th International Conference on Neutrino Physics and
Astrophysics - Neutrino 2000 (Sudbury, Ontario, Canada, 16-21 June 2000) | Nucl.Phys.Proc.Suppl.91:167-173,2001 | 10.1016/S0920-5632(00)00937-3 | null | hep-ph | null | We briefly review the current status of standard oscillations of atmospheric
neutrinos in schemes with two, three, and four flavor mixing. It is shown that,
although the pure \nu_\mu-->\nu_\tau channel provides an excellent 2\nu fit to
the data, one cannot exclude, at present, the occurrence of additional
subleading \nu_\mu-->\nu_e oscillations (3\nu schemes) or of sizable
\nu_\mu-->\nu_s oscillations (4\nu schemes). It is also shown that the wide
dynamical range of energy and pathlength probed by the Super-Kamiokande
experiment puts severe constraints on nonstandard explanations of the
atmospheric neutrino data, with a few notable exceptions.
| [
{
"created": "Fri, 22 Sep 2000 13:56:06 GMT",
"version": "v1"
}
] | 2009-10-07 | [
[
"Fogli",
"G. L.",
"",
"Bari U. & INFN"
],
[
"Lisi",
"E.",
"",
"Bari U. & INFN"
],
[
"Marrone",
"A.",
"",
"Bari U. & INFN"
],
[
"Montanino",
"D.",
"",
"U. of Lecce"
]
] | We briefly review the current status of standard oscillations of atmospheric neutrinos in schemes with two, three, and four flavor mixing. It is shown that, although the pure \nu_\mu-->\nu_\tau channel provides an excellent 2\nu fit to the data, one cannot exclude, at present, the occurrence of additional subleading \nu_\mu-->\nu_e oscillations (3\nu schemes) or of sizable \nu_\mu-->\nu_s oscillations (4\nu schemes). It is also shown that the wide dynamical range of energy and pathlength probed by the Super-Kamiokande experiment puts severe constraints on nonstandard explanations of the atmospheric neutrino data, with a few notable exceptions. |
0705.1729 | Dmitry Gorbunov | Dmitry Gorbunov, Mikhail Shaposhnikov | How to find neutral leptons of the nuMSM? | 45 pages, 17 figures; v2: references added, journal version | JHEP0710:015,2007 | 10.1088/1126-6708/2007/10/015 | null | hep-ph | null | An extension of the Standard Model by three singlet fermions with masses
smaller than the electroweak scale allows to explain simultaneously neutrino
oscillations, dark matter and baryon asymmetry of the Universe. We discuss the
properties of neutral leptons in this model and the ways they can be searched
for in particle physics experiments. We establish, in particular, a lower and
an upper bound on the strength of interaction of neutral leptons coming from
cosmological considerations and from the data on neutrino oscillations. We
analyse the production of neutral leptons in the decays of different mesons and
in $pp$ collisions. We study in detail decays of neutral leptons and establish
a lower bound on their mass coming from existing experimental data and Big Bang
Nucleosynthesis. We argue that the search for a specific missing energy signal
in kaon decays would allow to strengthen considerably the bounds on neutral
fermion couplings and to find or definitely exclude them below the kaon
threshold. To enter into cosmologically interesting parameter range for masses
above kaon mass the dedicated searches similar to CERN PS191 experiment would
be needed with the use of intensive proton beams. We argue that the use of
CNGS, NuMI, T2K or NuTeV beams could allow to search for singlet leptons below
charm in a large portion of the parameter space of the nuMSM. The search of
singlet fermions in the mass interval 2-5 GeV would require a considerable
increase of the intensity of proton accelerators or the detailed analysis of
kinematics of more than 10^{10} B-meson decays.
| [
{
"created": "Fri, 11 May 2007 20:51:19 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Oct 2007 17:42:58 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Gorbunov",
"Dmitry",
""
],
[
"Shaposhnikov",
"Mikhail",
""
]
] | An extension of the Standard Model by three singlet fermions with masses smaller than the electroweak scale allows to explain simultaneously neutrino oscillations, dark matter and baryon asymmetry of the Universe. We discuss the properties of neutral leptons in this model and the ways they can be searched for in particle physics experiments. We establish, in particular, a lower and an upper bound on the strength of interaction of neutral leptons coming from cosmological considerations and from the data on neutrino oscillations. We analyse the production of neutral leptons in the decays of different mesons and in $pp$ collisions. We study in detail decays of neutral leptons and establish a lower bound on their mass coming from existing experimental data and Big Bang Nucleosynthesis. We argue that the search for a specific missing energy signal in kaon decays would allow to strengthen considerably the bounds on neutral fermion couplings and to find or definitely exclude them below the kaon threshold. To enter into cosmologically interesting parameter range for masses above kaon mass the dedicated searches similar to CERN PS191 experiment would be needed with the use of intensive proton beams. We argue that the use of CNGS, NuMI, T2K or NuTeV beams could allow to search for singlet leptons below charm in a large portion of the parameter space of the nuMSM. The search of singlet fermions in the mass interval 2-5 GeV would require a considerable increase of the intensity of proton accelerators or the detailed analysis of kinematics of more than 10^{10} B-meson decays. |
2305.16398 | Vasja Susi\v{c} | K.S. Babu, Borut Bajc, Vasja Susi\v{c} | Trinification from $\mathrm{E}_{6}$ symmetry breaking | 29 pages, 15 tables, 3 figures | null | 10.1007/JHEP07(2023)011 | null | hep-ph | http://creativecommons.org/licenses/by-sa/4.0/ | In the context of $\mathrm{E}_{6}$ Grand Unified Theories (GUTs), an
intriguing possibility for symmetry breaking to the Standard Model (SM) group
involves an intermediate stage characterized by either
$\mathrm{SU}(3)\times\mathrm{SU}(3)\times\mathrm{SU}(3)$ (trinification) or
$\mathrm{SU}(6)\times\mathrm{SU}(2)$. The more common choices of
$\mathrm{SU(5)}$ and $\mathrm{SO}(10)$ GUT symmetry groups do not offer such
breaking chains. We argue that the presence of a real (rank $2$ tensor)
representation $\mathbf{650}$ of $\mathrm{E}_{6}$ in the scalar sector is the
minimal and likely only reasonable possibility to obtain one of the novel
intermediate stages. We analyze the renormalizable scalar potential of a single
copy of the $\mathbf{650}$ and find vacuum solutions that support regularly
embedded subgroups $\mathrm{SU}(3)\times\mathrm{SU}(3)\times\mathrm{SU}(3)$,
$\mathrm{SU}(6)\times\mathrm{SU}(2)$, and $\mathrm{SO}(10)\times\mathrm{U}(1)$,
as well as specially embedded subgroups $\mathrm{F}_{4}$ and
$\mathrm{SU}(3)\times\mathrm{G}_{2}$ that do not contain the SM gauge symmetry.
We show that for a suitable choice of parameters, each of the regular cases can
be obtained as the lowest among the analyzed minima in the potential.
| [
{
"created": "Thu, 25 May 2023 18:03:10 GMT",
"version": "v1"
}
] | 2023-07-26 | [
[
"Babu",
"K. S.",
""
],
[
"Bajc",
"Borut",
""
],
[
"Susič",
"Vasja",
""
]
] | In the context of $\mathrm{E}_{6}$ Grand Unified Theories (GUTs), an intriguing possibility for symmetry breaking to the Standard Model (SM) group involves an intermediate stage characterized by either $\mathrm{SU}(3)\times\mathrm{SU}(3)\times\mathrm{SU}(3)$ (trinification) or $\mathrm{SU}(6)\times\mathrm{SU}(2)$. The more common choices of $\mathrm{SU(5)}$ and $\mathrm{SO}(10)$ GUT symmetry groups do not offer such breaking chains. We argue that the presence of a real (rank $2$ tensor) representation $\mathbf{650}$ of $\mathrm{E}_{6}$ in the scalar sector is the minimal and likely only reasonable possibility to obtain one of the novel intermediate stages. We analyze the renormalizable scalar potential of a single copy of the $\mathbf{650}$ and find vacuum solutions that support regularly embedded subgroups $\mathrm{SU}(3)\times\mathrm{SU}(3)\times\mathrm{SU}(3)$, $\mathrm{SU}(6)\times\mathrm{SU}(2)$, and $\mathrm{SO}(10)\times\mathrm{U}(1)$, as well as specially embedded subgroups $\mathrm{F}_{4}$ and $\mathrm{SU}(3)\times\mathrm{G}_{2}$ that do not contain the SM gauge symmetry. We show that for a suitable choice of parameters, each of the regular cases can be obtained as the lowest among the analyzed minima in the potential. |
2103.05218 | Yu-Chen Guo | Hua-Ying Zhang, Chong-Xing Yue, Yu-Chen Guo, Shuo Yang | Searching for axion-like particles at future electron-positron colliders | 16 pages, 9 figures, 3 tables. Submitted to Physical Review D | null | 10.1103/PhysRevD.104.096008 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the prospects for discovering axion-like particles (ALPs) via
a light-by-light (LBL) scattering at two colliders, the future circular
collider (FCC-ee) and circular electron-positron collider (CEPC). The promising
sensitivities to the effective ALP-photon coupling $g_{a\gamma\gamma}$ are
obtained. Our numerical results show that the FCC-ee and CEPC might be more
sensitive to the ALPs with mass 2 GeV $\sim$ 10 GeV than the LHC and CLIC.
| [
{
"created": "Tue, 9 Mar 2021 04:38:45 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Jun 2021 03:19:03 GMT",
"version": "v2"
},
{
"created": "Sat, 16 Oct 2021 06:45:28 GMT",
"version": "v3"
}
] | 2021-11-24 | [
[
"Zhang",
"Hua-Ying",
""
],
[
"Yue",
"Chong-Xing",
""
],
[
"Guo",
"Yu-Chen",
""
],
[
"Yang",
"Shuo",
""
]
] | We investigate the prospects for discovering axion-like particles (ALPs) via a light-by-light (LBL) scattering at two colliders, the future circular collider (FCC-ee) and circular electron-positron collider (CEPC). The promising sensitivities to the effective ALP-photon coupling $g_{a\gamma\gamma}$ are obtained. Our numerical results show that the FCC-ee and CEPC might be more sensitive to the ALPs with mass 2 GeV $\sim$ 10 GeV than the LHC and CLIC. |
2006.10035 | Masaki Yamada | Fuminobu Takahashi, Masaki Yamada, Wen Yin | XENON1T excess from anomaly-free ALP dark matter and its implications
for stellar cooling anomaly | 6 pages, 2 figures; (v2: discussion extended to the case of
subdominant ALP DM and added implications for stellar cooling anomaly.
Conclusion unchanged.); (v3: figure added, published version) | Phys. Rev. Lett. 125, 161801 (2020) | 10.1103/PhysRevLett.125.161801 | TU-1104, IPMU20-0069 | hep-ph astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, an anomalous excess was found in the electronic recoil data
collected at the XENON1T experiment. The excess may be explained by an
axion-like particle (ALP) with mass of a few keV and a coupling to electron of
$g_{ae} \sim 10^{-13}$, if the ALP constitutes all or some fraction of local
dark matter (DM). In order to satisfy the X-ray constraint, the ALP coupling to
photons must be significantly suppressed compared to that to electrons. This
strongly suggests that the ALP has no anomalous couplings to photons, i.e.,
there is no U(1)$_{\rm PQ}$-U(1)$_{\rm em}$-U(1)$_{\rm em}$ anomaly. We show
that such anomaly-free ALP DM predicts an X-ray line signal with a definite
strength through the operator arising from threshold corrections, and compare
it with the projected sensitivity of the ATHENA X-ray observatory. The
abundance of ALP DM can be explained by the misalignment mechanism, or by
thermal production if it constitutes a part of DM. In particular, we find that
the anomalous excess reported by the XENON1T experiment as well as the stellar
cooling anomalies from white dwarfs and red giants can be explained
simultaneously better when the ALP constitutes about 10\% of DM. As concrete
models, we revisit the leptophilic anomaly-free ALP DM considered in
[Phys.Lett.B 734 (2014) 178-182] as well as an ALP model based on a two Higgs
doublet model in the supplemental material.
| [
{
"created": "Wed, 17 Jun 2020 17:56:21 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jun 2020 17:29:54 GMT",
"version": "v2"
},
{
"created": "Sat, 14 Nov 2020 15:50:46 GMT",
"version": "v3"
}
] | 2020-11-17 | [
[
"Takahashi",
"Fuminobu",
""
],
[
"Yamada",
"Masaki",
""
],
[
"Yin",
"Wen",
""
]
] | Recently, an anomalous excess was found in the electronic recoil data collected at the XENON1T experiment. The excess may be explained by an axion-like particle (ALP) with mass of a few keV and a coupling to electron of $g_{ae} \sim 10^{-13}$, if the ALP constitutes all or some fraction of local dark matter (DM). In order to satisfy the X-ray constraint, the ALP coupling to photons must be significantly suppressed compared to that to electrons. This strongly suggests that the ALP has no anomalous couplings to photons, i.e., there is no U(1)$_{\rm PQ}$-U(1)$_{\rm em}$-U(1)$_{\rm em}$ anomaly. We show that such anomaly-free ALP DM predicts an X-ray line signal with a definite strength through the operator arising from threshold corrections, and compare it with the projected sensitivity of the ATHENA X-ray observatory. The abundance of ALP DM can be explained by the misalignment mechanism, or by thermal production if it constitutes a part of DM. In particular, we find that the anomalous excess reported by the XENON1T experiment as well as the stellar cooling anomalies from white dwarfs and red giants can be explained simultaneously better when the ALP constitutes about 10\% of DM. As concrete models, we revisit the leptophilic anomaly-free ALP DM considered in [Phys.Lett.B 734 (2014) 178-182] as well as an ALP model based on a two Higgs doublet model in the supplemental material. |
2404.09856 | Andre Hoang | Andr\'e H. Hoang and Oliver L. Jin and Simon Pl\"atzer and Daniel
Samitz | Matching Hadronization and Perturbative Evolution: The Cluster Model in
Light of Infrared Shower Cutoff Dependence | 54 pages, 17 figures | null | null | UWThPh-2023-23, MCnet-24-05 | hep-ph hep-ex | http://creativecommons.org/licenses/by/4.0/ | In the context of Monte Carlo (MC) generators with parton showers that have
next-to-leading-logarithmic (NLL) precision, the cutoff $Q_0$ terminating the
shower evolution should be viewed as an infrared factorization scale so that
parameters or non-perturbative effects of the MC generator may have a field
theoretic interpretation with a controllable scheme dependence. This implies
that the generator's parton level should be carefully defined within QCD
perturbation theory with subleading order precision. Furthermore, it entails
that the shower cut $Q_0$ is not treated as one of the generator's tuning
parameters, but that the tuning can be carried out reliably for a range of
$Q_0$ values and that the hadron level description is $Q_0$-invariant. This in
turn imposes non-trival constraints on the behavior of the generator's
hadronization model, so that its parameters can adapt accordingly when the
$Q_0$ value is changed. We investigate these features using the angular ordered
parton shower and the cluster hadronization model implemented in the Herwig~7.2
MC generator focusing in particular on the $e^+e^-$ 2-jettiness distribution,
where the shower is known to be NLL precise and where QCD factorization imposes
stringent constraints on the hadronization corrections. We show that the Herwig
default cluster hadronization model does not exhibit these features or
consistency with QCD factorization with a satisfying precision. We design a
modification of the cluster hadronization model, where some dynamical parton
shower aspects are added that are missing in the default model. For this novel
dynamical cluster hadronization model these features and consistency with QCD
factorization are realized much more accurately.
| [
{
"created": "Mon, 15 Apr 2024 15:12:41 GMT",
"version": "v1"
}
] | 2024-04-16 | [
[
"Hoang",
"André H.",
""
],
[
"Jin",
"Oliver L.",
""
],
[
"Plätzer",
"Simon",
""
],
[
"Samitz",
"Daniel",
""
]
] | In the context of Monte Carlo (MC) generators with parton showers that have next-to-leading-logarithmic (NLL) precision, the cutoff $Q_0$ terminating the shower evolution should be viewed as an infrared factorization scale so that parameters or non-perturbative effects of the MC generator may have a field theoretic interpretation with a controllable scheme dependence. This implies that the generator's parton level should be carefully defined within QCD perturbation theory with subleading order precision. Furthermore, it entails that the shower cut $Q_0$ is not treated as one of the generator's tuning parameters, but that the tuning can be carried out reliably for a range of $Q_0$ values and that the hadron level description is $Q_0$-invariant. This in turn imposes non-trival constraints on the behavior of the generator's hadronization model, so that its parameters can adapt accordingly when the $Q_0$ value is changed. We investigate these features using the angular ordered parton shower and the cluster hadronization model implemented in the Herwig~7.2 MC generator focusing in particular on the $e^+e^-$ 2-jettiness distribution, where the shower is known to be NLL precise and where QCD factorization imposes stringent constraints on the hadronization corrections. We show that the Herwig default cluster hadronization model does not exhibit these features or consistency with QCD factorization with a satisfying precision. We design a modification of the cluster hadronization model, where some dynamical parton shower aspects are added that are missing in the default model. For this novel dynamical cluster hadronization model these features and consistency with QCD factorization are realized much more accurately. |
hep-ph/0605137 | Elena G. Ferreiro | A. Capella, E. G. Ferreiro | Radial Flow in a Final State Interaction Model | 9 pages, 2 figures | null | null | null | hep-ph | null | In the framework of a final state interaction model, we show that the
so-called radial flow, i.e. the almost linear increase of the inverse slope $T$
with the mass of the produced particle, is already contained in the initial
condition -- with a slope $<u_t^2>$ (the so-called strength of the average
radial transverse flow) which is larger than the measured one. While the
precise value of the slope depends on the details of the model, the above
result has a very general basis -- namely the increase with increasing $p_T$ of
the fixed $p_T$ suppression, in the low $p_T$ region.
| [
{
"created": "Thu, 11 May 2006 19:05:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Capella",
"A.",
""
],
[
"Ferreiro",
"E. G.",
""
]
] | In the framework of a final state interaction model, we show that the so-called radial flow, i.e. the almost linear increase of the inverse slope $T$ with the mass of the produced particle, is already contained in the initial condition -- with a slope $<u_t^2>$ (the so-called strength of the average radial transverse flow) which is larger than the measured one. While the precise value of the slope depends on the details of the model, the above result has a very general basis -- namely the increase with increasing $p_T$ of the fixed $p_T$ suppression, in the low $p_T$ region. |
2311.16963 | Yan-Qing Ma | Huan-Yu Bi, Li-Hong Huang, Rui-Jun Huang, Yan-Qing Ma, Huai-Min Yu | Electroweak corrections to double Higgs production at the LHC | 7 pages, 4 figures, version published in PRL | Phys.Rev.Lett. 132 (2024) 231802 | 10.1103/PhysRevLett.132.231802 | null | hep-ph hep-ex | http://creativecommons.org/licenses/by/4.0/ | We present the results for the complete next-to-leading order electroweak
corrections to $pp \to HH$ at the Large Hadron Collider, focusing on the
dominant gluon-gluon fusion process. While the corrections at the total
cross-section level are approximately $-4\%$, those near the energy of $HH$
production threshold exceed $+15\%$, and corrections at the high-energy region
are around $-10\%$, leading to a shape distortion for the differential
distributions. Our findings substantially diminish the theoretical
uncertainties associated with this pivotal process, providing valuable input
for understanding the shape of the Higgs boson potential upon comparison with
experimental measurements.
| [
{
"created": "Tue, 28 Nov 2023 17:10:11 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Dec 2023 11:06:17 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Jun 2024 04:32:37 GMT",
"version": "v3"
}
] | 2024-06-12 | [
[
"Bi",
"Huan-Yu",
""
],
[
"Huang",
"Li-Hong",
""
],
[
"Huang",
"Rui-Jun",
""
],
[
"Ma",
"Yan-Qing",
""
],
[
"Yu",
"Huai-Min",
""
]
] | We present the results for the complete next-to-leading order electroweak corrections to $pp \to HH$ at the Large Hadron Collider, focusing on the dominant gluon-gluon fusion process. While the corrections at the total cross-section level are approximately $-4\%$, those near the energy of $HH$ production threshold exceed $+15\%$, and corrections at the high-energy region are around $-10\%$, leading to a shape distortion for the differential distributions. Our findings substantially diminish the theoretical uncertainties associated with this pivotal process, providing valuable input for understanding the shape of the Higgs boson potential upon comparison with experimental measurements. |
2107.01212 | Thomas Becher | Thomas Becher, Matthias Neubert and Ding Yu Shao | Resummation of Super-Leading Logarithms | 6 pages, 2 figures | null | 10.1103/PhysRevLett.127.212002 | MITP-21-033 | hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Jet cross sections at high-energy colliders exhibit intricate patterns of
logarithmically enhanced higher-order corrections. In particular, so-called
non-global logarithms emerge from soft radiation emitted off energetic partons
inside jets. While this is a single-logarithmic effect at lepton colliders, at
hadron colliders phase factors in the amplitudes lead to double-logarithmic
corrections starting at four-loop order. This effect was discovered a long time
ago, but not much is known about the higher-order behavior of these terms and
their process dependence. We derive, for the first time, the all-order
structure of these "super-leading logarithms" for generic $2\to l$ scattering
processes at hadron colliders and resum them in closed form.
| [
{
"created": "Fri, 2 Jul 2021 18:00:01 GMT",
"version": "v1"
}
] | 2021-12-01 | [
[
"Becher",
"Thomas",
""
],
[
"Neubert",
"Matthias",
""
],
[
"Shao",
"Ding Yu",
""
]
] | Jet cross sections at high-energy colliders exhibit intricate patterns of logarithmically enhanced higher-order corrections. In particular, so-called non-global logarithms emerge from soft radiation emitted off energetic partons inside jets. While this is a single-logarithmic effect at lepton colliders, at hadron colliders phase factors in the amplitudes lead to double-logarithmic corrections starting at four-loop order. This effect was discovered a long time ago, but not much is known about the higher-order behavior of these terms and their process dependence. We derive, for the first time, the all-order structure of these "super-leading logarithms" for generic $2\to l$ scattering processes at hadron colliders and resum them in closed form. |
2306.10638 | Fedor Simkovic | M.I. Krivoruchenko and F. \v{S}imkovic | Neutrino mixing matrix in terms of neutrino mass matrix and its
Frobenius covariants | 4 pages, two references added, misprints removed | Physics of Particles and Nuclei Letters, 2024, Vol. 21, No. 1, pp.
1 - 4 | 10.1134/S1547477124010072 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An explicit expression is derived for the mixing matrix of Majorana neutrinos
in terms of the mass matrix and its Frobenius covariants. Illustrative
scenarios are taken as examples where the suggested formula is used to obtain
the mixing matrix from the mass matrix.
| [
{
"created": "Sun, 18 Jun 2023 21:20:02 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Jun 2023 06:05:56 GMT",
"version": "v2"
}
] | 2024-05-10 | [
[
"Krivoruchenko",
"M. I.",
""
],
[
"Šimkovic",
"F.",
""
]
] | An explicit expression is derived for the mixing matrix of Majorana neutrinos in terms of the mass matrix and its Frobenius covariants. Illustrative scenarios are taken as examples where the suggested formula is used to obtain the mixing matrix from the mass matrix. |
hep-ph/0111152 | Supratim Sengupta | Rajarshi Ray and Supratim Sengupta | Stochastic Production Of Kink-Antikink Pairs In The Presence Of An
Oscillating Background | Revtex, 21 pages including 7 figures; more references added | Phys.Rev. D65 (2002) 063521 | 10.1103/PhysRevD.65.063521 | null | hep-ph cond-mat.stat-mech | null | We numerically investigate the production of kink-antikink pairs in a $(1+1)$
dimensional $\phi^4$ field theory subject to white noise and periodic driving.
The twin effects of noise and periodic driving acting in conjunction lead to
considerable enhancement in the kink density compared to the thermal
equilibrium value, for low dissipation coefficients and for a specific range of
frequencies of the oscillating background. The dependence of the kink-density
on the temperature of the heat bath, the amplitude of the oscillating
background and value of the dissipation coefficient is also investigated. An
interesting feature of our result is that kink-antikink production occurs even
though the system always remains in the broken symmetry phase.
| [
{
"created": "Mon, 12 Nov 2001 21:36:20 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Dec 2001 22:41:02 GMT",
"version": "v2"
},
{
"created": "Fri, 14 Dec 2001 19:27:24 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Ray",
"Rajarshi",
""
],
[
"Sengupta",
"Supratim",
""
]
] | We numerically investigate the production of kink-antikink pairs in a $(1+1)$ dimensional $\phi^4$ field theory subject to white noise and periodic driving. The twin effects of noise and periodic driving acting in conjunction lead to considerable enhancement in the kink density compared to the thermal equilibrium value, for low dissipation coefficients and for a specific range of frequencies of the oscillating background. The dependence of the kink-density on the temperature of the heat bath, the amplitude of the oscillating background and value of the dissipation coefficient is also investigated. An interesting feature of our result is that kink-antikink production occurs even though the system always remains in the broken symmetry phase. |
0709.2339 | Daniel Gamermann | D. Gamermann, L. R. Dai and E. Oset | Radiative decay of the dynamically generated open and hidden charm
scalar meson resonances D_{s0}^*(2317) and X(3700) | Appendix added | Phys.Rev.C76:055205,2007 | 10.1103/PhysRevC.76.055205 | null | hep-ph | null | We present the formalism for the decay of dynamically generated scalar mesons
with open- or hidden-charm and give results for the decay of D^*_{s0} (2317) to
\gamma D_s^* plus that of a hidden charm scalar meson state predicted by the
theory around 3700 MeV decaying into \gamma J/\psi.
| [
{
"created": "Fri, 14 Sep 2007 16:23:25 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Nov 2007 11:55:58 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Gamermann",
"D.",
""
],
[
"Dai",
"L. R.",
""
],
[
"Oset",
"E.",
""
]
] | We present the formalism for the decay of dynamically generated scalar mesons with open- or hidden-charm and give results for the decay of D^*_{s0} (2317) to \gamma D_s^* plus that of a hidden charm scalar meson state predicted by the theory around 3700 MeV decaying into \gamma J/\psi. |
0910.4644 | Roman Pasechnik | V. I. Kuksa, R. S. Pasechnik | Near-threshold boson pair production in the model of smeared-mass
unstable particles | 15 pages, 6 figures, minor corrections, references added | Phys.Atom.Nucl.73:1622-1631,2010 | 10.1134/S1063778810090140 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Near-threshold production of boson pairs is considered within the framework
of the model of unstable particles with smeared mass. We describe the principal
aspects of the model and consider the strategy of calculations including the
radiative corrections. The results of calculations are in good agreement with
LEP II data and Monte-Carlo simulations. Suggested approach significantly
simplifies calculations with respect to the standard perturbative one.
| [
{
"created": "Sat, 24 Oct 2009 11:36:32 GMT",
"version": "v1"
},
{
"created": "Sat, 5 Dec 2009 15:40:44 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Kuksa",
"V. I.",
""
],
[
"Pasechnik",
"R. S.",
""
]
] | Near-threshold production of boson pairs is considered within the framework of the model of unstable particles with smeared mass. We describe the principal aspects of the model and consider the strategy of calculations including the radiative corrections. The results of calculations are in good agreement with LEP II data and Monte-Carlo simulations. Suggested approach significantly simplifies calculations with respect to the standard perturbative one. |
1311.6369 | Hua-Xing Chen | Hua-Xing Chen | How fast can an unstable particle decay into two final states and be
observed | 16 pages, 8 figures, 8 tables, references added and typos corrected | null | null | null | hep-ph nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate unstable hadrons (resonances) which mainly decay into two
final states in a very short time. We estimate how far at most these two final
states can travel away from each other in the half-life of the initial unstable
hadron. As examples, this distance is about 2.5 fm for rho -> pi pi, 1.8 fm for
Delta -> N pi, and 0.6 fm for f_0(500) -> pi pi. We calculate this distance for
altogether 181 hadrons, among all the 324 ones listed in PDG2012 together with
Zc(3900) and Zc(4025). We find it is around one femtometer for many hadrons,
which is of the same order of magnitude as the hadronic radii. We also estimate
this distance for altogether 15 unstable nuclei. We find it is about several
femtometers for some of them, which is of the same order of magnitude as the
nuclear radii. For example, it is about six femtometers for O12 -> N11 p.
| [
{
"created": "Mon, 4 Nov 2013 13:02:47 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Dec 2013 12:22:14 GMT",
"version": "v2"
}
] | 2013-12-06 | [
[
"Chen",
"Hua-Xing",
""
]
] | We investigate unstable hadrons (resonances) which mainly decay into two final states in a very short time. We estimate how far at most these two final states can travel away from each other in the half-life of the initial unstable hadron. As examples, this distance is about 2.5 fm for rho -> pi pi, 1.8 fm for Delta -> N pi, and 0.6 fm for f_0(500) -> pi pi. We calculate this distance for altogether 181 hadrons, among all the 324 ones listed in PDG2012 together with Zc(3900) and Zc(4025). We find it is around one femtometer for many hadrons, which is of the same order of magnitude as the hadronic radii. We also estimate this distance for altogether 15 unstable nuclei. We find it is about several femtometers for some of them, which is of the same order of magnitude as the nuclear radii. For example, it is about six femtometers for O12 -> N11 p. |
hep-ph/9506410 | null | S.V.Bashinsky and B.Kerbikov (Institute of Theoretical and
Experimental Physics) | Reexamination of KKbar Threshold Phenomena with K+K- Atom Included | 14 pages, FAX copies of the figures will be sent after your request
by e-mail at "bashinsky@vxitep.itep.ru" | Phys.Atom.Nucl.59:1979-1987,1996; Yad.Fiz.59N11:2054-2062,1996 | null | CEA SACLAY, DAPNIA/SPHN 95-35, 06/1995 | hep-ph | null | We develop a general framework to study KKbar threshold phenomena with
resonances f0, a0 and K+K- atom included. Based on this formalism we predict
that the production of the K+K- atom in p+d=3He+X and similar reactions exhi-
bits a drastic energy dependence due to the interplay with resonances f0 (980)
and a0 (980). We point out that a set of few parameters describes KKbar
threshold effects, f0 and a0 mesons, and K+K- atom. Our hope is that precision
experimental study aimed at determining these parameters may shed more light on
the nature of f0 and a0 resonances.
| [
{
"created": "Fri, 23 Jun 1995 16:50:14 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Bashinsky",
"S. V.",
"",
"Institute of Theoretical and\n Experimental Physics"
],
[
"Kerbikov",
"B.",
"",
"Institute of Theoretical and\n Experimental Physics"
]
] | We develop a general framework to study KKbar threshold phenomena with resonances f0, a0 and K+K- atom included. Based on this formalism we predict that the production of the K+K- atom in p+d=3He+X and similar reactions exhi- bits a drastic energy dependence due to the interplay with resonances f0 (980) and a0 (980). We point out that a set of few parameters describes KKbar threshold effects, f0 and a0 mesons, and K+K- atom. Our hope is that precision experimental study aimed at determining these parameters may shed more light on the nature of f0 and a0 resonances. |
2307.08508 | Thomas G. Rizzo | Thomas G. Rizzo | Towards UV-Models of Kinetic Mixing and Portal Matter IV: Quartification | 33 pages, 7 Figs; text augmented and ref. added | null | null | SLAC-PUB-17728 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As is well-known, Trinification, \ie, the extension of the Standard Model
(SM) to $[SU(3)]^3=SU(3)_c\times SU(3)_L\times SU(3)_R$ as occurs in $E_6$
models, allows for a partial unification of the gauge forces even though quarks
and leptons remain in separate multiplets so that no heavy gauge or scalar
fields exist which can generate proton decay. The extension of this idea to
Quartification, by including an additional $SU(3)'$ factor, has also been
considered in the literature maintaining the basic attributes of Trinification
but now allowing, \eg, for a more symmetric treatment of quarks and leptons at
the price of new matter fields and gauge interactions. In this paper, we will
consider this $SU(3)'$ to be the `dark' gauge group, now containing the
familiar $U(1)_D$ subgroup, under which the SM fields are all neutral, which is
associated with kinetic mixing (KM) and the existence of a light, $\lsim 1 $
GeV dark photon. This setup naturally predicts the existence of color-singlet
portal matter (PM) fields, carrying both electromagnetic and $U(1)_D$ dark
charges, that are necessary to generate this KM at the 1-loop level and whose
masses are directly tied with those of the many new gauge bosons that originate
from the extended gauge sector. In this paper, after a discussion of the
detailed structure of this model, we present a broad survey of the collider
phenomenology of the large set of new fields that must necessarily arise from
this setup in a simplified version involving only a single generation of
fermions. We demonstrate that several new signatures may be anticipated at the
LHC as well as at future hadron and lepton colliders if such models are
realized in nature.
| [
{
"created": "Mon, 17 Jul 2023 14:09:50 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Jul 2023 18:48:12 GMT",
"version": "v2"
},
{
"created": "Sat, 26 Aug 2023 15:27:12 GMT",
"version": "v3"
}
] | 2023-08-29 | [
[
"Rizzo",
"Thomas G.",
""
]
] | As is well-known, Trinification, \ie, the extension of the Standard Model (SM) to $[SU(3)]^3=SU(3)_c\times SU(3)_L\times SU(3)_R$ as occurs in $E_6$ models, allows for a partial unification of the gauge forces even though quarks and leptons remain in separate multiplets so that no heavy gauge or scalar fields exist which can generate proton decay. The extension of this idea to Quartification, by including an additional $SU(3)'$ factor, has also been considered in the literature maintaining the basic attributes of Trinification but now allowing, \eg, for a more symmetric treatment of quarks and leptons at the price of new matter fields and gauge interactions. In this paper, we will consider this $SU(3)'$ to be the `dark' gauge group, now containing the familiar $U(1)_D$ subgroup, under which the SM fields are all neutral, which is associated with kinetic mixing (KM) and the existence of a light, $\lsim 1 $ GeV dark photon. This setup naturally predicts the existence of color-singlet portal matter (PM) fields, carrying both electromagnetic and $U(1)_D$ dark charges, that are necessary to generate this KM at the 1-loop level and whose masses are directly tied with those of the many new gauge bosons that originate from the extended gauge sector. In this paper, after a discussion of the detailed structure of this model, we present a broad survey of the collider phenomenology of the large set of new fields that must necessarily arise from this setup in a simplified version involving only a single generation of fermions. We demonstrate that several new signatures may be anticipated at the LHC as well as at future hadron and lepton colliders if such models are realized in nature. |
2403.10364 | Eugene Levin | Eugene Levin (Tel Aviv U.) | Scattering amplitude in QCD: summing large Pomeron loops | 14pp ,3 figures in pdf files | null | null | null | hep-ph | http://creativecommons.org/licenses/by/4.0/ | In this paper we show that the sum of enhanced BFKL Pomeron loop diagrams
generates the scattering amplitude, which turns out to be much smaller, than in
the case of deep inelastic scattering. We use the simplified BFKL kernel in the
leading twist approximation, which reproduces the main features of the
scattering amplitude in the deep inelastic scattering(DIS). For such kernel the
results are highly unexpected and they contradict (i) the solution to the
Balitsky- Kovchegov(BK) equation for the scattering amplitude; (ii) the idea
that the scattering amplitude stems from rare fluctuation and it has the same
form as in DIS ; and (iii) the numerical simulations. We sincerely hope, that
we made a mistake, which we failed to note, and which our reader will find. If
not , we need to reconsider our view on the sum of the BFKL Pomeron loops and
accept that their summing will lead to large contribution of the rare
configurations in CGC approach to the scattering amplitude.
| [
{
"created": "Fri, 15 Mar 2024 14:55:37 GMT",
"version": "v1"
}
] | 2024-03-18 | [
[
"Levin",
"Eugene",
"",
"Tel Aviv U."
]
] | In this paper we show that the sum of enhanced BFKL Pomeron loop diagrams generates the scattering amplitude, which turns out to be much smaller, than in the case of deep inelastic scattering. We use the simplified BFKL kernel in the leading twist approximation, which reproduces the main features of the scattering amplitude in the deep inelastic scattering(DIS). For such kernel the results are highly unexpected and they contradict (i) the solution to the Balitsky- Kovchegov(BK) equation for the scattering amplitude; (ii) the idea that the scattering amplitude stems from rare fluctuation and it has the same form as in DIS ; and (iii) the numerical simulations. We sincerely hope, that we made a mistake, which we failed to note, and which our reader will find. If not , we need to reconsider our view on the sum of the BFKL Pomeron loops and accept that their summing will lead to large contribution of the rare configurations in CGC approach to the scattering amplitude. |
1710.05041 | Adrian Dumitru | Adrian Dumitru and Vladimir Skokov | The Weizs\"acker-Williams distribution of linearly polarized gluons (and
its fluctuations) at small x | 10 pages, 3 figures; Proceedings of the XLVII International Symposium
on Multiparticle Dynamics, Tlaxcala City, Mexico, September 11--15, 2017; to
be published in EPJ-Conferences | null | 10.1051/epjconf/201817203009 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The conventional and linearly polarized Weizs\"acker-Williams gluon
distributions at small x are defined from the two-point function of the gluon
field in light-cone gauge. They appear in the cross section for dijet
production in deep inelastic scattering at high energy. We determine these
functions in the small-x limit from solutions of the JIMWLK evolution equations
and show that they exhibit approximate geometric scaling. Also, we discuss the
functional distributions of these WW gluon distributions over the JIMWLK
ensemble at rapidity $Y\sim 1/\alpha_s$. These are determined by a 2d Liouville
action for the logarithm of the covariant gauge function $g^2
\mathrm{tr}\,A^+(q)A^+(-q)$. For transverse momenta on the order of the
saturation scale we observe large variations across configurations (evolution
trajectories) of the linearly polarized distribution up to several times its
average, and even to negative values.
| [
{
"created": "Fri, 13 Oct 2017 18:11:40 GMT",
"version": "v1"
}
] | 2018-03-14 | [
[
"Dumitru",
"Adrian",
""
],
[
"Skokov",
"Vladimir",
""
]
] | The conventional and linearly polarized Weizs\"acker-Williams gluon distributions at small x are defined from the two-point function of the gluon field in light-cone gauge. They appear in the cross section for dijet production in deep inelastic scattering at high energy. We determine these functions in the small-x limit from solutions of the JIMWLK evolution equations and show that they exhibit approximate geometric scaling. Also, we discuss the functional distributions of these WW gluon distributions over the JIMWLK ensemble at rapidity $Y\sim 1/\alpha_s$. These are determined by a 2d Liouville action for the logarithm of the covariant gauge function $g^2 \mathrm{tr}\,A^+(q)A^+(-q)$. For transverse momenta on the order of the saturation scale we observe large variations across configurations (evolution trajectories) of the linearly polarized distribution up to several times its average, and even to negative values. |
1609.03118 | Yoritaka Iwata | Yoritaka Iwata | Neutrino potential for neutrinoless double beta decay | To be published in Nuclear Physics Review (invited talk at 2016
Dalian International Workshop on Nuclear Physics). arXiv admin note:
substantial text overlap with arXiv:1701.07894 | Nucl. Phys. Rev., Vol. 34, Issue 1 (2017) 82-86 1007-4627(2017)
01-0082-05 | 10.11804/NuclPhysRev.34.01.082 | null | hep-ph nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Neutrino potential for neutrinoless double beta decay is studied with
focusing on its statistical property. The statistics provide a gross view of
understanding amplitude of constitutional components of the nuclear matrix
element.
| [
{
"created": "Sun, 11 Sep 2016 05:40:54 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Sep 2016 16:01:06 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Feb 2017 06:44:05 GMT",
"version": "v3"
}
] | 2019-03-26 | [
[
"Iwata",
"Yoritaka",
""
]
] | Neutrino potential for neutrinoless double beta decay is studied with focusing on its statistical property. The statistics provide a gross view of understanding amplitude of constitutional components of the nuclear matrix element. |
2403.17052 | Carlos Henrique de Lima | Carlos Henrique de Lima and Heather E. Logan | Can CP be conserved in the two-Higgs-doublet model? | 27 pages, 14 figures | null | null | null | hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the conditions under which the CP violation in the quark mixing
matrix can leak into the scalar potential of the real two-Higgs-doublet model
(2HDM) via divergent radiative corrections, thereby spoiling the
renormalizability of the model. We show that any contributing diagram must
involve 12 Yukawa-coupling insertions and a factor of the $U(1)_{PQ}$-breaking
scalar potential parameter $\lambda_5$, thereby requiring at least six loops;
this also implies that the 2HDM with only softly-broken $U(1)_{PQ}$ is safe
from divergent leaks of CP violation to all orders. We demonstrate that
additional symmetries of the six-loop diagrams in the type I and II 2HDMs
guarantee that all of the divergent CP-violating contributions cancel at this
order. We also show that these symmetries are violated at seven loops and
enumerate the classes of diagrams that can contribute to CP-violating
divergences, providing evidence that the real 2HDM is theoretically
inconsistent starting at the seven-loop level.
| [
{
"created": "Mon, 25 Mar 2024 18:00:01 GMT",
"version": "v1"
}
] | 2024-03-27 | [
[
"de Lima",
"Carlos Henrique",
""
],
[
"Logan",
"Heather E.",
""
]
] | We study the conditions under which the CP violation in the quark mixing matrix can leak into the scalar potential of the real two-Higgs-doublet model (2HDM) via divergent radiative corrections, thereby spoiling the renormalizability of the model. We show that any contributing diagram must involve 12 Yukawa-coupling insertions and a factor of the $U(1)_{PQ}$-breaking scalar potential parameter $\lambda_5$, thereby requiring at least six loops; this also implies that the 2HDM with only softly-broken $U(1)_{PQ}$ is safe from divergent leaks of CP violation to all orders. We demonstrate that additional symmetries of the six-loop diagrams in the type I and II 2HDMs guarantee that all of the divergent CP-violating contributions cancel at this order. We also show that these symmetries are violated at seven loops and enumerate the classes of diagrams that can contribute to CP-violating divergences, providing evidence that the real 2HDM is theoretically inconsistent starting at the seven-loop level. |
1606.09457 | Christian Bogner | Luise Adams, Christian Bogner, Stefan Weinzierl | The sunrise integral and elliptic polylogarithms | talk given at Loops and Legs 2016 | null | null | null | hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We summarize recent computations with a class of elliptic generalizations of
polylogarithms, arising from the massive sunrise integral. For the case of
arbitrary masses we obtain results in two and four space-time dimensions. The
iterated integral structure of our functions allows us to furthermore compute
the equal mass case to arbitrary order.
| [
{
"created": "Thu, 30 Jun 2016 12:23:30 GMT",
"version": "v1"
}
] | 2016-07-01 | [
[
"Adams",
"Luise",
""
],
[
"Bogner",
"Christian",
""
],
[
"Weinzierl",
"Stefan",
""
]
] | We summarize recent computations with a class of elliptic generalizations of polylogarithms, arising from the massive sunrise integral. For the case of arbitrary masses we obtain results in two and four space-time dimensions. The iterated integral structure of our functions allows us to furthermore compute the equal mass case to arbitrary order. |
hep-ph/0303214 | Emi Kou | S. Khalil and E. Kou | A possible supersymmetric solution to the discrepancy between B -> \phi
K_S and B -> \eta' K_S CP asymmetries | 4 pages, 2 figures | Phys.Rev.Lett. 91 (2003) 241602 | 10.1103/PhysRevLett.91.241602 | IPPP/03/11, DCPT/03/22 | hep-ph | null | We present a possible supersymmetric solution to the discrepancy between the
observed mixing CP asymmetries in B -> \phi K_S and B -> \eta' K_S. We show
that due to the different parity in the final states of these processes, their
supersymmetric contributions from the R-sector have an opposite sign, which
naturally explain the large deviation between S_{\phi K_S} and S_{\eta' K_S}.
We also consider the proposed mechanisms to solve the puzzle of the observed
large branching ratio of B -> \eta' K and study their impact on S_{eta' K_S}.
| [
{
"created": "Tue, 25 Mar 2003 19:09:04 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Nov 2003 17:42:08 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Khalil",
"S.",
""
],
[
"Kou",
"E.",
""
]
] | We present a possible supersymmetric solution to the discrepancy between the observed mixing CP asymmetries in B -> \phi K_S and B -> \eta' K_S. We show that due to the different parity in the final states of these processes, their supersymmetric contributions from the R-sector have an opposite sign, which naturally explain the large deviation between S_{\phi K_S} and S_{\eta' K_S}. We also consider the proposed mechanisms to solve the puzzle of the observed large branching ratio of B -> \eta' K and study their impact on S_{eta' K_S}. |
hep-ph/9701345 | Yoshio Koide | Yoshio Koide | NNI-Form Quark Mass Matrix Expressed by the Observable Quantities | 11 pages (LaTeX); Title was changed | Mod.Phys.Lett. A12 (1997) 2655-2664 | 10.1142/S021773239700279X | us-97-01 Revised Version | hep-ph | null | It is pointed out that the phase convention of the CKM matrix V affects
texture analysis of the quark mass matrices (M_u, M_d) when we try to describe
(M_u, M_d) by the observable quantities (quark masses and CKM matrix
parameters) only. This is demonstrated for a case of the non-Hermitian
Fritzsch-type mass matrix (tilde{M}_u, tilde{M}_d), which is a general
expression of quark mass matrix (M_u, M_d) and is described by twelve
parameters. We find that we can always choose a phase convention of V which
yields tilde{M}_{u32} = 0, so that the remaining ten parameters in (tilde{M}_u,
tilde{M}_d) can completely be expressed by the ten observable quantities.
| [
{
"created": "Wed, 22 Jan 1997 10:27:00 GMT",
"version": "v1"
},
{
"created": "Sun, 23 Mar 1997 09:26:58 GMT",
"version": "v2"
},
{
"created": "Mon, 19 May 1997 10:34:53 GMT",
"version": "v3"
}
] | 2009-10-30 | [
[
"Koide",
"Yoshio",
""
]
] | It is pointed out that the phase convention of the CKM matrix V affects texture analysis of the quark mass matrices (M_u, M_d) when we try to describe (M_u, M_d) by the observable quantities (quark masses and CKM matrix parameters) only. This is demonstrated for a case of the non-Hermitian Fritzsch-type mass matrix (tilde{M}_u, tilde{M}_d), which is a general expression of quark mass matrix (M_u, M_d) and is described by twelve parameters. We find that we can always choose a phase convention of V which yields tilde{M}_{u32} = 0, so that the remaining ten parameters in (tilde{M}_u, tilde{M}_d) can completely be expressed by the ten observable quantities. |
hep-ph/9912305 | Peter Arnold | Peter Arnold and Laurence G. Yaffe | Non-perturbative dynamics of hot non-Abelian gauge fields: beyond
leading log approximation | 20 pages, 1 figure | Phys.Rev.D62:125013,2000 | 10.1103/PhysRevD.62.125013 | UW/PT 99-25 | hep-ph | null | Many aspects of high-temperature gauge theories, such as the electroweak
baryon number violation rate, color conductivity, and the hard gluon damping
rate, have previously been understood only at leading logarithmic order (that
is, neglecting effects suppressed only by an inverse logarithm of the gauge
coupling). We discuss how to systematically go beyond leading logarithmic order
in the analysis of physical quantities. Specifically, we extend to
next-to-leading-log order (NLLO) the simple leading-log effective theory due to
Bodeker that describes non-perturbative color physics in hot non-Abelian
plasmas. A suitable scaling analysis is used to show that no new operators
enter the effective theory at next-to-leading-log order. However, a NLLO
calculation of the color conductivity is required, and we report the resulting
value. Our NLLO result for the color conductivity can be trivially combined
with previous numerical work by G. Moore to yield a NLLO result for the hot
electroweak baryon number violation rate.
| [
{
"created": "Fri, 10 Dec 1999 22:35:31 GMT",
"version": "v1"
}
] | 2010-02-16 | [
[
"Arnold",
"Peter",
""
],
[
"Yaffe",
"Laurence G.",
""
]
] | Many aspects of high-temperature gauge theories, such as the electroweak baryon number violation rate, color conductivity, and the hard gluon damping rate, have previously been understood only at leading logarithmic order (that is, neglecting effects suppressed only by an inverse logarithm of the gauge coupling). We discuss how to systematically go beyond leading logarithmic order in the analysis of physical quantities. Specifically, we extend to next-to-leading-log order (NLLO) the simple leading-log effective theory due to Bodeker that describes non-perturbative color physics in hot non-Abelian plasmas. A suitable scaling analysis is used to show that no new operators enter the effective theory at next-to-leading-log order. However, a NLLO calculation of the color conductivity is required, and we report the resulting value. Our NLLO result for the color conductivity can be trivially combined with previous numerical work by G. Moore to yield a NLLO result for the hot electroweak baryon number violation rate. |
1311.2647 | Roland E. Allen | Roland E. Allen | The Higgs Bridge | 36 pages; Physica Scripta, following Nobel Symposium 154 on Physics
of the Large Hadron Collider; primarily for students and nonexperts | null | 10.1088/0031-8949/89/01/018001 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The particle recently discovered at the Large Hadron Collider near Geneva is
almost certainly a Higgs boson, the long-sought completion of the Standard
Model of particle physics. But this discovery, an achievement by more than six
thousand scientists (including students), is actually much more than a mere
capstone of the Standard Model. It instead represents a bridge from the
Standard Model to exciting discoveries of the future, at higher energies or in
other experiments, and to the properties of matter at very low temperatures.
The mere existence of a particle with zero spin implies a need for new physics,
with the most likely candidate being supersymmetry, which requires that every
known particle has a superpartner yet to be discovered. And phenomena similar
to the Higgs are seen in superconducting metals and superfluid gases at low
temperatures, which extend down to a millionth or even a billionth of a degree
Kelvin. So the discovery of a Higgs boson has a central place in our attempts
both to achieve a true understanding of Nature and to harness Nature in
practical applications.
| [
{
"created": "Mon, 11 Nov 2013 23:43:23 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Dec 2013 20:28:35 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Allen",
"Roland E.",
""
]
] | The particle recently discovered at the Large Hadron Collider near Geneva is almost certainly a Higgs boson, the long-sought completion of the Standard Model of particle physics. But this discovery, an achievement by more than six thousand scientists (including students), is actually much more than a mere capstone of the Standard Model. It instead represents a bridge from the Standard Model to exciting discoveries of the future, at higher energies or in other experiments, and to the properties of matter at very low temperatures. The mere existence of a particle with zero spin implies a need for new physics, with the most likely candidate being supersymmetry, which requires that every known particle has a superpartner yet to be discovered. And phenomena similar to the Higgs are seen in superconducting metals and superfluid gases at low temperatures, which extend down to a millionth or even a billionth of a degree Kelvin. So the discovery of a Higgs boson has a central place in our attempts both to achieve a true understanding of Nature and to harness Nature in practical applications. |
2104.09542 | Parsa Hossein Ghorbani | Parsa Ghorbani | Vacuum Stability vs. Positivity in Real Singlet Scalar Extension of the
Standard Model | 12 pages, 2 tables, 4 figures; references added | null | 10.1016/j.nuclphysb.2021.115533 | null | hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We assume a generic real singlet scalar extension of the Standard Model
living in the vacuum $(v,w)$ at the electroweak scale with $v=246$ GeV and $w$
being respectively the Higgs and the singlet scalar vacuum expectation values.
By requiring {\it absolute} vacuum stability for the vacuum $(v,w)$, the
positivity condition and the perturbativity up to the Planck scale, we show
that the viable space of parameters in the model is strongly constrained for
various singlet scalar vacuum expectation values $w=0.1, 1, 10, 100$ TeV. Also,
it turns out that the singlet scalar mass can be from a few GeV up to less than
TeV.
| [
{
"created": "Mon, 19 Apr 2021 18:06:29 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Jun 2021 12:57:45 GMT",
"version": "v2"
}
] | 2021-09-22 | [
[
"Ghorbani",
"Parsa",
""
]
] | We assume a generic real singlet scalar extension of the Standard Model living in the vacuum $(v,w)$ at the electroweak scale with $v=246$ GeV and $w$ being respectively the Higgs and the singlet scalar vacuum expectation values. By requiring {\it absolute} vacuum stability for the vacuum $(v,w)$, the positivity condition and the perturbativity up to the Planck scale, we show that the viable space of parameters in the model is strongly constrained for various singlet scalar vacuum expectation values $w=0.1, 1, 10, 100$ TeV. Also, it turns out that the singlet scalar mass can be from a few GeV up to less than TeV. |
2212.00045 | Graham Van Goffrier | Matteo Agostini, Frank F. Deppisch, and Graham Van Goffrier | Probing the Mechanism of Neutrinoless Double-Beta Decay in Multiple
Isotopes | 30 pages, 9 figures | null | 10.1007/JHEP02(2023)172 | null | hep-ph hep-ex nucl-ex | http://creativecommons.org/licenses/by/4.0/ | A large experimental program is being mounted to search for neutrinoless
double-beta decay over the next decade. Multiple experiments using different
target isotopes are being prepared to explore the whole parameter space allowed
for inverted-ordered light neutrinos, and have the potential to make
discoveries in several other scenarios, including normal-ordered light
neutrinos and other exotic mechanisms. We investigate to what extent long-range
and exotic short-range contributions may be distinguished by combining
measurements of the decay half-life across isotopes. We demonstrate how
measurements in two isotopes may facilitate a joint measurement up to a
two-fold degeneracy, and how a further measurement in a third isotope may
remove this degeneracy. We also highlight the precision of the nuclear matrix
elements needed to convert half-lives into information on the underlying decay
mechanism. Considering their correlations and uncertainties in the framework of
a global Bayesian analysis, we assess the consequences of a possible future
10-fold reduction in uncertainties. Our work motivates an experimental program
measuring neutrinoless double-beta decay in more than one isotope, as this
would break parameter degeneracies and advance our understanding of particle
physics beyond the Standard Model.
| [
{
"created": "Wed, 30 Nov 2022 19:00:04 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Jan 2023 14:33:25 GMT",
"version": "v2"
}
] | 2023-03-22 | [
[
"Agostini",
"Matteo",
""
],
[
"Deppisch",
"Frank F.",
""
],
[
"Van Goffrier",
"Graham",
""
]
] | A large experimental program is being mounted to search for neutrinoless double-beta decay over the next decade. Multiple experiments using different target isotopes are being prepared to explore the whole parameter space allowed for inverted-ordered light neutrinos, and have the potential to make discoveries in several other scenarios, including normal-ordered light neutrinos and other exotic mechanisms. We investigate to what extent long-range and exotic short-range contributions may be distinguished by combining measurements of the decay half-life across isotopes. We demonstrate how measurements in two isotopes may facilitate a joint measurement up to a two-fold degeneracy, and how a further measurement in a third isotope may remove this degeneracy. We also highlight the precision of the nuclear matrix elements needed to convert half-lives into information on the underlying decay mechanism. Considering their correlations and uncertainties in the framework of a global Bayesian analysis, we assess the consequences of a possible future 10-fold reduction in uncertainties. Our work motivates an experimental program measuring neutrinoless double-beta decay in more than one isotope, as this would break parameter degeneracies and advance our understanding of particle physics beyond the Standard Model. |
hep-ph/0508141 | Alfredo Valcarce | T.Fernandez-Carames, A. Valcarce, P. Gonzalez | Diquark-diquark correlations in the $^1S_0$ $\Lambda \Lambda$ potential | 10 pages, 7 figures, accepted for publication in Phys. Rev. D | Phys.Rev. D72 (2005) 054008 | 10.1103/PhysRevD.72.054008 | null | hep-ph hep-ex nucl-th | null | We derive a $\Lambda \Lambda$ potential from a chiral constituent quark model
that has been successful in describing one, two and three nonstrange baryon
systems. The resulting interaction at low energy is attractive at all distances
due to the $\sigma $ exchange term. The attraction allows for a slightly bound
state just below the $\Lambda \Lambda $ threshold. No short-range repulsive
core is found. We extract the diquark-diquark contribution that turns out to be
the most attractive and probable at small distances. At large distances the
asymptotic behavior of the $\Lambda \Lambda $ interaction provides a prediction
for the $\sigma \Lambda \Lambda $ coupling constant.
| [
{
"created": "Thu, 11 Aug 2005 22:06:17 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Fernandez-Carames",
"T.",
""
],
[
"Valcarce",
"A.",
""
],
[
"Gonzalez",
"P.",
""
]
] | We derive a $\Lambda \Lambda$ potential from a chiral constituent quark model that has been successful in describing one, two and three nonstrange baryon systems. The resulting interaction at low energy is attractive at all distances due to the $\sigma $ exchange term. The attraction allows for a slightly bound state just below the $\Lambda \Lambda $ threshold. No short-range repulsive core is found. We extract the diquark-diquark contribution that turns out to be the most attractive and probable at small distances. At large distances the asymptotic behavior of the $\Lambda \Lambda $ interaction provides a prediction for the $\sigma \Lambda \Lambda $ coupling constant. |
1706.02002 | Narbe Kalantarians | Narbe Kalantarians, Eric Christy and Cynthia Keppel | Comparison of the Structure Function F2 as Measured by Charged Lepton
and Neutrino Scattering from Iron Targets | 5 pages, 3 figures, submitted to Physical Review C Rapid
Communication for publication | Phys. Rev. C 96, 032201 (2017) | 10.1103/PhysRevC.96.032201 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A comparison study of world data for the structure function F2 for Iron, as
measured by both charged lepton and neutrino scattering experiments, is
presented. Consistency of results for both charged lepton and neutrino
scattering is observed for the full global data set in the valence regime.
Consistency is also observed at low x for the various neutrino data sets, as
well as for the charged lepton data sets, independently. However, data from the
two probes exhibit differences on the order of 15% in the
shadowing/anti-shadowing transition region where the Bjorken scaling variable x
is < 0.15. This observation is indicative that neutrino probes of nucleon
structure might be sensitive to different nuclear effects than charged lepton
probes. Details and results of the data comparison are here presented.
| [
{
"created": "Tue, 6 Jun 2017 22:57:39 GMT",
"version": "v1"
}
] | 2017-09-20 | [
[
"Kalantarians",
"Narbe",
""
],
[
"Christy",
"Eric",
""
],
[
"Keppel",
"Cynthia",
""
]
] | A comparison study of world data for the structure function F2 for Iron, as measured by both charged lepton and neutrino scattering experiments, is presented. Consistency of results for both charged lepton and neutrino scattering is observed for the full global data set in the valence regime. Consistency is also observed at low x for the various neutrino data sets, as well as for the charged lepton data sets, independently. However, data from the two probes exhibit differences on the order of 15% in the shadowing/anti-shadowing transition region where the Bjorken scaling variable x is < 0.15. This observation is indicative that neutrino probes of nucleon structure might be sensitive to different nuclear effects than charged lepton probes. Details and results of the data comparison are here presented. |
0907.1483 | Lourdes Tabares | Antonio Dobado, Lourdes Tabares-Cheluci (Madrid U.), Siannah Penaranda
(Zaragoza U.), Javier Rodriguez-Laguna (Carlos III U.) | Radiative corrections to the Higgs potential in the LH model | 27 pages, 4 figures, 1 table | Eur.Phys.J.C66:429-443,2010 | 10.1140/epjc/s10052-010-1259-9 | null | hep-ph | http://creativecommons.org/licenses/by/3.0/ | In this work we compute the radiative corrections to the Higgs mass and the
Higgs quartic couplings coming from the Higgs sector itself and the scalar
fields $\phi$ in the Littlest Higgs (LH) model. The restrictions that the new
contributions set on the parameter space of the models are also discussed.
Finally this work, together with our three previous papers, complete our
program addressed to compute the relevant contributions to the Higgs low-energy
effective potential in the LH model and the analysis of their phenomenological
consequences.
| [
{
"created": "Thu, 9 Jul 2009 10:06:24 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Aug 2009 17:03:18 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Dobado",
"Antonio",
"",
"Madrid U."
],
[
"Tabares-Cheluci",
"Lourdes",
"",
"Madrid U."
],
[
"Penaranda",
"Siannah",
"",
"Zaragoza U."
],
[
"Rodriguez-Laguna",
"Javier",
"",
"Carlos III U."
]
] | In this work we compute the radiative corrections to the Higgs mass and the Higgs quartic couplings coming from the Higgs sector itself and the scalar fields $\phi$ in the Littlest Higgs (LH) model. The restrictions that the new contributions set on the parameter space of the models are also discussed. Finally this work, together with our three previous papers, complete our program addressed to compute the relevant contributions to the Higgs low-energy effective potential in the LH model and the analysis of their phenomenological consequences. |
1309.6055 | Andrea Wulzer Dr | Andrea Wulzer | An Equivalent Gauge and the Equivalence Theorem | 36 pages, 2 figures. In v2: references added and typos corrected;
comparison with arXiv:1106.5537 added | Nucl.Phys.B 885 (2014) 97-126 | 10.1016/j.nuclphysb.2014.05.021 | null | hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I describe a novel covariant formulation of massive gauge theories in which
the longitudinal polarization vectors do not grow with the energy. Therefore in
the present formalism, differently from the ordinary one, the energy and
coupling power-counting is completely transparent at the level of individual
Feynman diagrams, with obvious advantages both at the conceptual and practical
level.
Since power-counting is transparent, the high-energy limit of the amplitudes
involving longitudinal particles is immediately taken, and the Equivalence
Theorem is easily demonstrated at all orders in perturbation theory. Since the
formalism makes the Equivalence Theorem self-evident, and because it is based
on a suitable choice of the gauge, we can call it an "Equivalent Gauge".
| [
{
"created": "Tue, 24 Sep 2013 06:15:55 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Oct 2013 06:56:18 GMT",
"version": "v2"
}
] | 2014-09-12 | [
[
"Wulzer",
"Andrea",
""
]
] | I describe a novel covariant formulation of massive gauge theories in which the longitudinal polarization vectors do not grow with the energy. Therefore in the present formalism, differently from the ordinary one, the energy and coupling power-counting is completely transparent at the level of individual Feynman diagrams, with obvious advantages both at the conceptual and practical level. Since power-counting is transparent, the high-energy limit of the amplitudes involving longitudinal particles is immediately taken, and the Equivalence Theorem is easily demonstrated at all orders in perturbation theory. Since the formalism makes the Equivalence Theorem self-evident, and because it is based on a suitable choice of the gauge, we can call it an "Equivalent Gauge". |
1007.0925 | Olga Lalakulich | Olga Lalakulich, Tina Leitner, Oliver Buss, Ulrich Mosel | One pion production in neutrino reactions: including non-resonant
background | 20 pages, 21 figure; v2: minor text modification in the introduction,
corrected typos | Phys.Rev.D82:093001,2010 | 10.1103/PhysRevD.82.093001 | null | hep-ph hep-ex nucl-ex nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate neutrino induced one pion production on nucleons. The
elementary neutrino--nucleon cross section is calculated as the sum of the
leading Delta pole diagram and several background diagrams obtained within the
non-linear sigma model. This approach does not introduce any new adjustable
parameters, which allows unambiguous predictions for the observables.
Considering electroproduction experiments as benchmark, the model is shown to
be applicable up to pion-nucleon invariant mass $W<1.4\GeV$ and provides a good
accuracy. With respect to the total one pion cross section, the model predicts
the background at the level of $=10% for the $p\pi^+$, 30% for $p\pi^0$ and 50%
for $n\pi^+$ final states. The results are compared with experimental data for
various differential cross sections. Distributions with respect to muon-nucleon
and muon-pion invariant masses are presented for the first time. The model
describes the data quite well, with the discrepancies being of the same order
as those between different data sets.
| [
{
"created": "Tue, 6 Jul 2010 15:34:56 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Nov 2010 16:16:46 GMT",
"version": "v2"
}
] | 2010-11-11 | [
[
"Lalakulich",
"Olga",
""
],
[
"Leitner",
"Tina",
""
],
[
"Buss",
"Oliver",
""
],
[
"Mosel",
"Ulrich",
""
]
] | We investigate neutrino induced one pion production on nucleons. The elementary neutrino--nucleon cross section is calculated as the sum of the leading Delta pole diagram and several background diagrams obtained within the non-linear sigma model. This approach does not introduce any new adjustable parameters, which allows unambiguous predictions for the observables. Considering electroproduction experiments as benchmark, the model is shown to be applicable up to pion-nucleon invariant mass $W<1.4\GeV$ and provides a good accuracy. With respect to the total one pion cross section, the model predicts the background at the level of $=10% for the $p\pi^+$, 30% for $p\pi^0$ and 50% for $n\pi^+$ final states. The results are compared with experimental data for various differential cross sections. Distributions with respect to muon-nucleon and muon-pion invariant masses are presented for the first time. The model describes the data quite well, with the discrepancies being of the same order as those between different data sets. |
1101.2408 | Vladimir Baryshevsky | V.G. Baryshevsky, A.R. Shyrvel | Influence of Multiple Scattering on High-energy Deuteron Quasi-optical
Birefringence Effect | 27 pages, 5 figures | null | null | null | hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Influence of multiple scattering on high-energy deuteron quasi-optical
birefringence effect is discussed.
| [
{
"created": "Wed, 12 Jan 2011 17:17:26 GMT",
"version": "v1"
}
] | 2011-01-13 | [
[
"Baryshevsky",
"V. G.",
""
],
[
"Shyrvel",
"A. R.",
""
]
] | Influence of multiple scattering on high-energy deuteron quasi-optical birefringence effect is discussed. |
0908.2856 | Kenji Morita | Kenji Morita and Su Houng Lee | Heavy quarkonium correlators at finite temperature: QCD sum rule
approach | Revised version to appear in PRD. 31 pages, 31 figures. Title is
changed | Phys.Rev.D82:054008,2010 | 10.1103/PhysRevD.82.054008 | INT-PUB-09-041 | hep-ph hep-lat nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the properties of heavy quarkonia at finite temperature in
detail using QCD sum rules. Extending previous analyses, we take into account a
temperature dependent effective continuum threshold and derive constraints on
the mass, the width, and the varying effective continuum threshold. We find
that at least one of these quantities of a charmonium changes abruptly in the
vicinity of the phase transition. We also calculate the ratio of the imaginary
time correlator to its reconstructed one, $G/G_{\text{rec}}$, by constructing a
model spectral function and compare it to the corresponding lattice QCD
results. We demonstrate that the almost constant unity of $G/G_{\text{rec}}$
can be obtained from the destructive interplay of the changes in each part of
the spectral modification which are extracted from QCD sum rules.
| [
{
"created": "Thu, 20 Aug 2009 05:49:16 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Aug 2010 08:39:47 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Morita",
"Kenji",
""
],
[
"Lee",
"Su Houng",
""
]
] | We investigate the properties of heavy quarkonia at finite temperature in detail using QCD sum rules. Extending previous analyses, we take into account a temperature dependent effective continuum threshold and derive constraints on the mass, the width, and the varying effective continuum threshold. We find that at least one of these quantities of a charmonium changes abruptly in the vicinity of the phase transition. We also calculate the ratio of the imaginary time correlator to its reconstructed one, $G/G_{\text{rec}}$, by constructing a model spectral function and compare it to the corresponding lattice QCD results. We demonstrate that the almost constant unity of $G/G_{\text{rec}}$ can be obtained from the destructive interplay of the changes in each part of the spectral modification which are extracted from QCD sum rules. |
0905.0865 | Claudio Coriano | Roberta Armillis, Claudio Coriano, Luigi Delle Rose, Marco Guzzi | Anomalous U(1) Models in Four and Five Dimensions and their Anomaly
Poles | Revised final version, to appear on JHEP | JHEP 0912:029,2009 | 10.1088/1126-6708/2009/12/029 | null | hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the role played by anomaly poles in an anomalous gauge theory by
discussing their signature in the corresponding off-shell effective action. The
origin of these contributions, in the most general kinematical case, is
elucidated by performing a complete analysis of the anomaly vertex at
perturbative level. We use two independent (but equivalent) representations:
the Rosenberg representation and the longitudinal/transverse (L/T)
parameterization, used in recent studies of $g-2$ of the muon and in the proof
of non-renormalization theorems of the anomaly vertex. The poles extracted from
the L/T parameterization do not couple in the infrared for generic anomalous
vertices, as in Rosenberg, but we show that they are responsible for the
violations of unitarity in the UV region, using a class of pole-dominated
amplitudes. We conclude that consistent formulations of anomalous models
require necessarily the cancellation of these polar contributions. Establishing
the UV significance of these terms provides a natural bridge between the
anomalous effective action and its completion by a nonlocal theory. Some
additional difficulties with unitarity of the mechanism of inflow in extra
dimensional models with an anomalous theory on the brane, due to the presence
of anomaly poles, are also pointed out.
| [
{
"created": "Wed, 6 May 2009 16:22:05 GMT",
"version": "v1"
},
{
"created": "Wed, 6 May 2009 21:08:38 GMT",
"version": "v2"
},
{
"created": "Sat, 21 Nov 2009 20:12:41 GMT",
"version": "v3"
}
] | 2009-12-15 | [
[
"Armillis",
"Roberta",
""
],
[
"Coriano",
"Claudio",
""
],
[
"Rose",
"Luigi Delle",
""
],
[
"Guzzi",
"Marco",
""
]
] | We analyze the role played by anomaly poles in an anomalous gauge theory by discussing their signature in the corresponding off-shell effective action. The origin of these contributions, in the most general kinematical case, is elucidated by performing a complete analysis of the anomaly vertex at perturbative level. We use two independent (but equivalent) representations: the Rosenberg representation and the longitudinal/transverse (L/T) parameterization, used in recent studies of $g-2$ of the muon and in the proof of non-renormalization theorems of the anomaly vertex. The poles extracted from the L/T parameterization do not couple in the infrared for generic anomalous vertices, as in Rosenberg, but we show that they are responsible for the violations of unitarity in the UV region, using a class of pole-dominated amplitudes. We conclude that consistent formulations of anomalous models require necessarily the cancellation of these polar contributions. Establishing the UV significance of these terms provides a natural bridge between the anomalous effective action and its completion by a nonlocal theory. Some additional difficulties with unitarity of the mechanism of inflow in extra dimensional models with an anomalous theory on the brane, due to the presence of anomaly poles, are also pointed out. |
hep-ph/9308324 | Mark Srednicki | Toby Falk, Richard Madden, Keith A. Olive, and Mark Srednicki | Corrections to Bino Annihilation I: Sfermion Mixing | 11 pages in LaTex plus 4 postscript figures (included),
CfPA--93--th--21, UMN--TH--1205/93 | Phys.Lett.B318:354-359,1993 | 10.1016/0370-2693(93)90139-9 | null | hep-ph | null | We consider corrections to bino annihilation due to sfermion mixing.
| [
{
"created": "Mon, 23 Aug 1993 23:26:48 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Falk",
"Toby",
""
],
[
"Madden",
"Richard",
""
],
[
"Olive",
"Keith A.",
""
],
[
"Srednicki",
"Mark",
""
]
] | We consider corrections to bino annihilation due to sfermion mixing. |
hep-ph/0010209 | Santi Peris | E. de Rafael (Marseille) | Minimal Hadronic Ansatz to Large-Nc QCD and Hadronic tau Decay | 7 pages with 3 figures. Latex file. Contribution to the
Euroconference QCD00, Montpellier, France | Nucl.Phys.Proc.Suppl. 96 (2001) 316-322 | 10.1016/S0920-5632(01)01147-1 | null | hep-ph | null | I report on some recent work done in collaboration with Santi Peris and Boris
Phily (hep-ph/0007338) where, using the Aleph data on vector and axial-vector
spectral functions, we test simple duality properties of QCD in the large-Nc
limit which emerge in the approximation of a {\it minimal hadronic ansatz} of a
spectrum of narrow states. These duality properties relate the short- and
long-distance behaviours of specific correlation functions, which are order
parameters of spontaneous chiral symmetry breaking, in a way that we find well
supported by the data.
| [
{
"created": "Wed, 18 Oct 2000 15:32:08 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"de Rafael",
"E.",
"",
"Marseille"
]
] | I report on some recent work done in collaboration with Santi Peris and Boris Phily (hep-ph/0007338) where, using the Aleph data on vector and axial-vector spectral functions, we test simple duality properties of QCD in the large-Nc limit which emerge in the approximation of a {\it minimal hadronic ansatz} of a spectrum of narrow states. These duality properties relate the short- and long-distance behaviours of specific correlation functions, which are order parameters of spontaneous chiral symmetry breaking, in a way that we find well supported by the data. |
1703.09692 | Gudrun Heinrich | S. Borowka, G. Heinrich, S. Jahn, S.P. Jones, M. Kerner, J. Schlenk,
T. Zirke | pySecDec: a toolbox for the numerical evaluation of multi-scale
integrals | replaced by published version | Comput. Phys. Commun. 222 (2018) 313 | 10.1016/j.cpc.2017.09.015 | MPP-2017-42, CERN-TH-2017-063, IPPP/17/24 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present pySecDec, a new version of the program SecDec, which performs the
factorisation of dimensionally regulated poles in parametric integrals, and the
subsequent numerical evaluation of the finite coefficients. The algebraic part
of the program is now written in the form of python modules, which allow a very
flexible usage. The optimization of the C++ code, generated using FORM, is
improved, leading to a faster numerical convergence. The new version also
creates a library of the integrand functions, such that it can be linked to
user-specific codes for the evaluation of matrix elements in a way similar to
analytic integral libraries.
| [
{
"created": "Tue, 28 Mar 2017 17:56:15 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Mar 2017 13:15:49 GMT",
"version": "v2"
},
{
"created": "Sun, 26 Nov 2017 09:50:18 GMT",
"version": "v3"
}
] | 2017-11-28 | [
[
"Borowka",
"S.",
""
],
[
"Heinrich",
"G.",
""
],
[
"Jahn",
"S.",
""
],
[
"Jones",
"S. P.",
""
],
[
"Kerner",
"M.",
""
],
[
"Schlenk",
"J.",
""
],
[
"Zirke",
"T.",
""
]
] | We present pySecDec, a new version of the program SecDec, which performs the factorisation of dimensionally regulated poles in parametric integrals, and the subsequent numerical evaluation of the finite coefficients. The algebraic part of the program is now written in the form of python modules, which allow a very flexible usage. The optimization of the C++ code, generated using FORM, is improved, leading to a faster numerical convergence. The new version also creates a library of the integrand functions, such that it can be linked to user-specific codes for the evaluation of matrix elements in a way similar to analytic integral libraries. |
hep-ph/0207142 | Nikolaos Kidonakis | Nikolaos Kidonakis | Two-loop QCD calculations in the eikonal approximation | 6 pages LaTeX, 3 figures, presented at DPF2002, Williamsburg,
Virginia, May 24-28, 2002 | null | null | null | hep-ph | null | I discuss recent progress in the calculation of two-loop QCD corrections in
the eikonal approximation. I present specific results for the UV structure of
the corrections.
| [
{
"created": "Wed, 10 Jul 2002 20:57:14 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kidonakis",
"Nikolaos",
""
]
] | I discuss recent progress in the calculation of two-loop QCD corrections in the eikonal approximation. I present specific results for the UV structure of the corrections. |
1508.04236 | Eugene Levin | E. Gotsman (Tel Aviv U.), E. Levin (Tel Aviv U./UTFSM) and U. Maor
(Tel Aviv U.) | CGC/saturation approach for soft interactions at high energy: long range
rapidity correlations | 22 pages and 13 figures in eps files | null | null | TAUP - 3000/15 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we continue our program to build a model for high energy soft
interactions, that is based on the CGC/saturation approach.The main result of
this paper is that we have discovered a mechanism that leads to large long
range rapidity correlations, and results in large values of the correlation
function $R\Lb y_1,y_2\Rb \,\geq \,1$, which is independent of $y_1$ and $
y_2$. Such behaviour of the correlation function, provides strong support for
the idea, that at high energies the system of partons that is produced, is not
only dense, but also has strong attractive forces acting between the partons.
| [
{
"created": "Tue, 18 Aug 2015 08:16:25 GMT",
"version": "v1"
}
] | 2015-08-19 | [
[
"Gotsman",
"E.",
"",
"Tel Aviv U."
],
[
"Levin",
"E.",
"",
"Tel Aviv U./UTFSM"
],
[
"Maor",
"U.",
"",
"Tel Aviv U."
]
] | In this paper we continue our program to build a model for high energy soft interactions, that is based on the CGC/saturation approach.The main result of this paper is that we have discovered a mechanism that leads to large long range rapidity correlations, and results in large values of the correlation function $R\Lb y_1,y_2\Rb \,\geq \,1$, which is independent of $y_1$ and $ y_2$. Such behaviour of the correlation function, provides strong support for the idea, that at high energies the system of partons that is produced, is not only dense, but also has strong attractive forces acting between the partons. |
1307.6861 | Miriam Diamond | Miriam D. Diamond and Philip Schuster | Searching for Light Dark Matter with the SLAC Millicharge Experiment | 4 pages, 5 figures, 1 table | Phys. Rev. Lett. 111, 221803 (2013) | 10.1103/PhysRevLett.111.221803 | null | hep-ph astro-ph.CO hep-ex | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | New sub-GeV gauge forces ("dark photons") that kinetically mix with the
photon provide a promising scenario for MeV-GeV dark matter, and are the
subject of a program of searches at fixed-target and collider facilities around
the world. In such models, dark photons produced in collisions may decay
invisibly into dark matter states, thereby evading current searches. We
re-examine results of the SLAC mQ electron beam dump experiment designed to
search for millicharged particles, and find that it was strongly sensitive to
any secondary beam of dark matter produced by electron-nucleus collisions in
the target. The constraints are competitive for dark photon masses in the ~1-30
MeV range, covering part of the parameter space that can reconcile the apparent
(g-2)_{\mu} anomaly. Simple adjustments to the original SLAC search for
millicharges may extend sensitivity to cover a sizable portion of the remaining
(g-2)_{\mu} anomaly-motivated region. The mQ sensitivity is therefore
complementary to on-going searches for visible decays of dark photons. Compared
to existing direct detection searches, mQ sensitivity to electron-dark matter
scattering cross sections is more than an order of magnitude better for a
significant range of masses and couplings in simple models.
| [
{
"created": "Thu, 25 Jul 2013 20:00:03 GMT",
"version": "v1"
}
] | 2013-12-04 | [
[
"Diamond",
"Miriam D.",
""
],
[
"Schuster",
"Philip",
""
]
] | New sub-GeV gauge forces ("dark photons") that kinetically mix with the photon provide a promising scenario for MeV-GeV dark matter, and are the subject of a program of searches at fixed-target and collider facilities around the world. In such models, dark photons produced in collisions may decay invisibly into dark matter states, thereby evading current searches. We re-examine results of the SLAC mQ electron beam dump experiment designed to search for millicharged particles, and find that it was strongly sensitive to any secondary beam of dark matter produced by electron-nucleus collisions in the target. The constraints are competitive for dark photon masses in the ~1-30 MeV range, covering part of the parameter space that can reconcile the apparent (g-2)_{\mu} anomaly. Simple adjustments to the original SLAC search for millicharges may extend sensitivity to cover a sizable portion of the remaining (g-2)_{\mu} anomaly-motivated region. The mQ sensitivity is therefore complementary to on-going searches for visible decays of dark photons. Compared to existing direct detection searches, mQ sensitivity to electron-dark matter scattering cross sections is more than an order of magnitude better for a significant range of masses and couplings in simple models. |
1109.4576 | Karol Kampf | Karol Kampf | Odd sector of QCD | 5 pages, 1 figure, presented at HADRON STRUCTURE 2001 conference | null | 10.1016/j.nuclphysbps.2011.10.073 | LU TP 11-36 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A systematic study of the odd-intrinsic parity sector of QCD is presented. We
briefly describe different applications including pi0 -> gamma gamma decay,
muonic (g-2) factor and a test of the new holographic conjectures.
| [
{
"created": "Wed, 21 Sep 2011 16:23:16 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Kampf",
"Karol",
""
]
] | A systematic study of the odd-intrinsic parity sector of QCD is presented. We briefly describe different applications including pi0 -> gamma gamma decay, muonic (g-2) factor and a test of the new holographic conjectures. |
1611.03157 | Nestor Quintero | Cesar A. Morales, Nestor Quintero, Carlos E. Vera, and Alexis Villalba | Analysis of the nonleptonic charmonium modes $B_s^0 \to J/\psi
f_{2}^{\prime}(1525)$ and $B_s^0 \to J/\psi K^+K^-$ | 19 pages, 2 figures. v3: matches with version (modified and
simplified) published in Phys. Rev. D | Phys. Rev. D 95, 036013 (2017) | 10.1103/PhysRevD.95.036013 | null | hep-ph hep-ex | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we present an analysis of the nonleptonic charmonium modes
$B_s^0 \to J / \psi f_2^\prime(1525)$ and $B_s^0 \to J/\psi K^+K^-$. Within the
framework of the factorization approach and using the perturbative QCD for the
evaluation of the relevant form factors, we find a branching fraction for the
two-body channel of BR$(B_s^{0} \to J/\psi f_2^{\prime}(1525)) = (1.6
{}^{+0.9}_{-0.7})\times 10^{-4}$ which is in agreement with the experimental
values reported by the LHCb and Belle Collaborations. The associated
polarization fractions to this vector-tensor mode are also presented. On the
other hand, non-resonant and resonant contributions to the three-body decay
$B_s^0 \to J/\psi K^+K^-$ are carefully investigated. The dominant
contributions of the resonances $ \phi(1020)$ and $f_2^{\prime}(1525)$ are
properly taken into account. A detailed analysis of the $K^+ K^-$ invariant
mass distributions and Dalitz plot are also performed. The overall result
BR$(B_s^{0} \to J/\psi K^+ K^-) = (9.3^{+1.3}_{-1.1})\times 10^{-4}$ is also in
satisfactory agreement with the experimental information reported by LHCb and
Belle.
| [
{
"created": "Thu, 10 Nov 2016 01:46:25 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Dec 2016 14:40:37 GMT",
"version": "v2"
},
{
"created": "Fri, 17 Feb 2017 20:31:47 GMT",
"version": "v3"
}
] | 2017-02-21 | [
[
"Morales",
"Cesar A.",
""
],
[
"Quintero",
"Nestor",
""
],
[
"Vera",
"Carlos E.",
""
],
[
"Villalba",
"Alexis",
""
]
] | In this work, we present an analysis of the nonleptonic charmonium modes $B_s^0 \to J / \psi f_2^\prime(1525)$ and $B_s^0 \to J/\psi K^+K^-$. Within the framework of the factorization approach and using the perturbative QCD for the evaluation of the relevant form factors, we find a branching fraction for the two-body channel of BR$(B_s^{0} \to J/\psi f_2^{\prime}(1525)) = (1.6 {}^{+0.9}_{-0.7})\times 10^{-4}$ which is in agreement with the experimental values reported by the LHCb and Belle Collaborations. The associated polarization fractions to this vector-tensor mode are also presented. On the other hand, non-resonant and resonant contributions to the three-body decay $B_s^0 \to J/\psi K^+K^-$ are carefully investigated. The dominant contributions of the resonances $ \phi(1020)$ and $f_2^{\prime}(1525)$ are properly taken into account. A detailed analysis of the $K^+ K^-$ invariant mass distributions and Dalitz plot are also performed. The overall result BR$(B_s^{0} \to J/\psi K^+ K^-) = (9.3^{+1.3}_{-1.1})\times 10^{-4}$ is also in satisfactory agreement with the experimental information reported by LHCb and Belle. |
hep-ph/9506365 | Shoichi Sasaki Rcnp | H. Toki (RCNP), S. Sasaki and H. Suganuma | Dual Ginzburg-Landau Theory and Chiral Symmetry Breaking | Talk presented by H. Toki at the Int. Conf. ``CONFINEMENT95'', March
22-24, 1995, Osaka, Japan, 8 pages, latex, ( 3 figures - available on request
from ssasaki@miho.rcnp.osaka-u.ac.jp ) | null | 10.1142/9789814447140_0027 | null | hep-ph | null | We study the properties of quarks, being confined in hadrons, with the
Schwinger-Dyson equation in the dual Ginzburg-Landau Theory. Magnetic monopole
condensation, which provides quark confinement, is demonstrated responsible
also for dynamical chiral-symmetry breaking. We discuss then the recovery of
the chiral symmetry at finite temperature.
| [
{
"created": "Tue, 20 Jun 1995 02:44:18 GMT",
"version": "v1"
}
] | 2016-11-03 | [
[
"Toki",
"H.",
"",
"RCNP"
],
[
"Sasaki",
"S.",
""
],
[
"Suganuma",
"H.",
""
]
] | We study the properties of quarks, being confined in hadrons, with the Schwinger-Dyson equation in the dual Ginzburg-Landau Theory. Magnetic monopole condensation, which provides quark confinement, is demonstrated responsible also for dynamical chiral-symmetry breaking. We discuss then the recovery of the chiral symmetry at finite temperature. |
hep-ph/0007231 | John R. Hiller | J.R. Hiller | Nonperturbative Calculation of Scattering Amplitudes | 9 pages, 1 figure; LaTeX, sprocl.sty, psfig.sty; to appear in the
proceedings of the fourth workshop on Continuous Advances in QCD,
Minneapolis, Minnesota, May 12-14, 2000 | null | null | UMN-D-00-3 | hep-ph | null | A method for the nonperturbative calculation of scattering amplitudes and
cross sections is discussed in the context of light-cone quantization. The
Lanczos-based recursion method of Haydock is suggested for the computation of
matrix elements of the resolvent for the light-cone Hamiltonian, from which the
T-matrix can be constructed. The scattering of composite particles is handled
by a generalization of a formulation given by Wick.
| [
{
"created": "Thu, 20 Jul 2000 19:54:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Hiller",
"J. R.",
""
]
] | A method for the nonperturbative calculation of scattering amplitudes and cross sections is discussed in the context of light-cone quantization. The Lanczos-based recursion method of Haydock is suggested for the computation of matrix elements of the resolvent for the light-cone Hamiltonian, from which the T-matrix can be constructed. The scattering of composite particles is handled by a generalization of a formulation given by Wick. |
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