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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
hep-ph/0310260 | Rupjyoti Gogoi | D.K.Choudhury and Rupjyoti Gogoi | Fractal Dimension of Proton at Small x | one tex file and 16 postscript figure files wrapped into a single zip
file | null | null | null | hep-ph | null | Recently the concept of self similarity in the structure of the proton at
small x has been introduced. We estimate the fractal dimension of proton in
analogy with classical monofractals.
| [
{
"created": "Wed, 22 Oct 2003 06:47:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Choudhury",
"D. K.",
""
],
[
"Gogoi",
"Rupjyoti",
""
]
] | Recently the concept of self similarity in the structure of the proton at small x has been introduced. We estimate the fractal dimension of proton in analogy with classical monofractals. |
hep-ph/9512248 | Ed Stoeffhaas | J.F. Amundson, O.J.P. E'boli, E.M. Gregores and F. Halzen | Colorless States in Perturbative QCD: Charmonium and Rapidity Gaps | 14 pages, plain Latex, 9 postscript figures included. Uses epsf.sty.
Postscript file of paper with figures also available at
http://phenom.physics.wisc.edu/pub/preprints/1995/madph-95-919.ps.Z or at
ftp://phenom.physics.wisc.edu/pub/preprints/1995/madph-95-919.ps.Z | Phys.Lett.B372:127-132,1996 | 10.1016/0370-2693(96)00035-4 | MADPH-95-919 | hep-ph | null | We point out that an unorthodox way to describe the production of rapidity
gaps in deep inelastic scattering, recently proposed by Buchm\"uller and
Hebecker, suggests a description of the production of heavy quark bound states
which is in agreement with data. The approach questions the conventional
treatment of the color quantum number in perturbative QCD.
| [
{
"created": "Wed, 6 Dec 1995 17:35:09 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Amundson",
"J. F.",
""
],
[
"E'boli",
"O. J. P.",
""
],
[
"Gregores",
"E. M.",
""
],
[
"Halzen",
"F.",
""
]
] | We point out that an unorthodox way to describe the production of rapidity gaps in deep inelastic scattering, recently proposed by Buchm\"uller and Hebecker, suggests a description of the production of heavy quark bound states which is in agreement with data. The approach questions the conventional treatment of the color quantum number in perturbative QCD. |
0908.3341 | Sandor D. Katz | Z. Fodor, S.D. Katz | The phase diagram of quantum chromodynamics | 48 pages, 33 figures. Accepted for publication in Landolt-Boernstein
Volume 1-23A. Originally submitted Nov.08; note added | null | null | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent results on the QCD phase diagram are reviewed. We begin with a
detailed introduction of lattice techniques. Then results at vanishing chemical
potential are presented. The order of the phase transition, the transition
temperature and the equation of state are discussed. At non-vanishing chemical
potential we study the mu-T phase line, the critical point as well as the
equation of state.
| [
{
"created": "Sun, 23 Aug 2009 22:19:43 GMT",
"version": "v1"
}
] | 2009-08-25 | [
[
"Fodor",
"Z.",
""
],
[
"Katz",
"S. D.",
""
]
] | Recent results on the QCD phase diagram are reviewed. We begin with a detailed introduction of lattice techniques. Then results at vanishing chemical potential are presented. The order of the phase transition, the transition temperature and the equation of state are discussed. At non-vanishing chemical potential we study the mu-T phase line, the critical point as well as the equation of state. |
hep-ph/9308282 | null | F. Pisano and V. Pleitez | Does $K_L-K_S$ mass difference constraints or \\ claims new physics
beyond the Standard Model? | Revtex, 9 pages (one figure avalaible on request), IFT-P.027/93 | null | null | null | hep-ph | null | The ratio $\Delta m_K/m_K$ within the standard model with 3 generations is
calculated as a function of the CP nonconserving phase $\delta_{13}$ and the
quark masses $m_c,m_t$ assuming the current values of the
Cabibbo-Kobayashi-Maskawa mixing angles. We have found that varying
$\delta_{13}$ and $m_c$ within the allowed range, not all the values for the
top quark mass fit the experimental value for that ratio.
| [
{
"created": "Mon, 16 Aug 1993 16:12:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pisano",
"F.",
""
],
[
"Pleitez",
"V.",
""
]
] | The ratio $\Delta m_K/m_K$ within the standard model with 3 generations is calculated as a function of the CP nonconserving phase $\delta_{13}$ and the quark masses $m_c,m_t$ assuming the current values of the Cabibbo-Kobayashi-Maskawa mixing angles. We have found that varying $\delta_{13}$ and $m_c$ within the allowed range, not all the values for the top quark mass fit the experimental value for that ratio. |
1802.04713 | Victor Goncalves | V. P. Goncalves, M. M. Jaime | Exclusive vector meson photoproduction in fixed - target collisions at
the LHC | 7 pages, 4 figures, 1 table. Enlarged and improved version published
in European Physical Journal C | null | 10.1140/epjc/s10052-018-6185-2 | null | hep-ph hep-ex nucl-ex nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The exclusive $\rho$, $\omega$ and $J/\Psi$ photoproduction in fixed - target
collisions at the LHC is investigated. We estimate, for the first time, the
rapidity and transverse momentum distributions of the vector meson
photoproduction in $p He$, $p Ar$, $Pb He$ and $Pb Ar$ fixed - target
collisions at the LHC using the STARlight Monte Carlo and present our results
for the total cross sections. Predictions for the kinematical range probed by
the LHCb detector are also presented. Our results indicate that the
experimental analysis of this process in fixed - target collisions at the LHC
is feasible. Such future analysis will probe the QCD dynamics in a kinematical
range complementary to that studied in the collider mode.
| [
{
"created": "Tue, 13 Feb 2018 16:27:42 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Sep 2018 16:15:35 GMT",
"version": "v2"
}
] | 2018-09-26 | [
[
"Goncalves",
"V. P.",
""
],
[
"Jaime",
"M. M.",
""
]
] | The exclusive $\rho$, $\omega$ and $J/\Psi$ photoproduction in fixed - target collisions at the LHC is investigated. We estimate, for the first time, the rapidity and transverse momentum distributions of the vector meson photoproduction in $p He$, $p Ar$, $Pb He$ and $Pb Ar$ fixed - target collisions at the LHC using the STARlight Monte Carlo and present our results for the total cross sections. Predictions for the kinematical range probed by the LHCb detector are also presented. Our results indicate that the experimental analysis of this process in fixed - target collisions at the LHC is feasible. Such future analysis will probe the QCD dynamics in a kinematical range complementary to that studied in the collider mode. |
1502.07011 | Sadataka Furui | Sadataka Furui | Cartan's Supersymmetry and the Decay of a $h^0$ with the mass
$m_{h^0}\simeq 11$GeV to $\Upsilon(1S)\gamma$ and to $\Upsilon(nS)\gamma
(n=1,2,3)$ | 8 pages, 3 figures. Trilinearities of quark antiquark and $\Upsilon$
couplings are corrected | null | null | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the LHCb detector at CERN, decays of $\chi_b(3P)$ meson to
$\Upsilon(1S)\gamma$ and $\Upsilon(2S)\gamma$ are reported at centre-of-mass
energy of $\sqrt s=7$ and 8 TeV. Following the success of the assignment of
$\chi_b(1P)\to\Upsilon(1S)\gamma$ of the mass of $m(\chi_b(1P))=9.8923$ GeV and
$\chi_b(2P)\to\Upsilon(1S)\gamma$ of the mass of $m(\chi_b(2P))=10.2547$ GeV,
the new state $\chi_b(3P)$ of the mass of 10.5157 GeV was assigned, but its
$J^{P}$ was not fixed.
We study the possibility that this boson is the light Higgs boson $h^0(0^+)$,
and study its decay modes to a $b\bar b$ which reduces to an $\Upsilon(mS)$
($m=1,2$ or 3) and $\bar q q$ which reduces to a $\gamma$, using the Cartan's
supersymmetry. Recent non observation of polarizations of $\Upsilon(nS)$ by the
CMS collaboration is consistent with the theory.
| [
{
"created": "Wed, 25 Feb 2015 00:01:56 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Feb 2016 10:12:45 GMT",
"version": "v2"
},
{
"created": "Sun, 22 May 2016 05:49:10 GMT",
"version": "v3"
},
{
"created": "Wed, 21 Sep 2016 13:05:41 GMT",
"version": "v4"
}
] | 2016-09-22 | [
[
"Furui",
"Sadataka",
""
]
] | In the LHCb detector at CERN, decays of $\chi_b(3P)$ meson to $\Upsilon(1S)\gamma$ and $\Upsilon(2S)\gamma$ are reported at centre-of-mass energy of $\sqrt s=7$ and 8 TeV. Following the success of the assignment of $\chi_b(1P)\to\Upsilon(1S)\gamma$ of the mass of $m(\chi_b(1P))=9.8923$ GeV and $\chi_b(2P)\to\Upsilon(1S)\gamma$ of the mass of $m(\chi_b(2P))=10.2547$ GeV, the new state $\chi_b(3P)$ of the mass of 10.5157 GeV was assigned, but its $J^{P}$ was not fixed. We study the possibility that this boson is the light Higgs boson $h^0(0^+)$, and study its decay modes to a $b\bar b$ which reduces to an $\Upsilon(mS)$ ($m=1,2$ or 3) and $\bar q q$ which reduces to a $\gamma$, using the Cartan's supersymmetry. Recent non observation of polarizations of $\Upsilon(nS)$ by the CMS collaboration is consistent with the theory. |
1112.0815 | Rafael Torrealba | Rafael Torrealba | "OPERA superluminal neutrinos explained by spontaneous emission and
stimulated absorption" | 6 pages, 2 fig | null | null | null | hep-ph hep-ex | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work it is shown, that for short 3ns neutrino pulses reported by
OPERA, a relativistic shape deforming effect of the neutrino distribution
function due to spontaneous emission, produces an earlier arrival of 65.8ns in
agreement with the reported 62.1ns\pm 3.7ns, with a RMS of 16.4ns explaining
the apparent superluminal effect. It is also shown, that early arrival of long
10500ns neutrinos pulse to Gran Sasso, by 57.8ns with respect to the speed of
light, could be explained by a shape deforming effect due to a combination of
stimulated absorption and spontaneous emission, while traveling by the decay
tunnel that acts as a LASER tube.
| [
{
"created": "Mon, 5 Dec 2011 00:12:53 GMT",
"version": "v1"
}
] | 2011-12-06 | [
[
"Torrealba",
"Rafael",
""
]
] | In this work it is shown, that for short 3ns neutrino pulses reported by OPERA, a relativistic shape deforming effect of the neutrino distribution function due to spontaneous emission, produces an earlier arrival of 65.8ns in agreement with the reported 62.1ns\pm 3.7ns, with a RMS of 16.4ns explaining the apparent superluminal effect. It is also shown, that early arrival of long 10500ns neutrinos pulse to Gran Sasso, by 57.8ns with respect to the speed of light, could be explained by a shape deforming effect due to a combination of stimulated absorption and spontaneous emission, while traveling by the decay tunnel that acts as a LASER tube. |
0810.2526 | Christian Fischer | Christian S. Fischer | Infrared behavior of QCD from the Dyson-Schwinger formalism | 7 pages, 2 figures, talk presented at the conference LIGHT CONE 2008,
July 7-11, 2008, Mulhouse, France | PoS LC2008:048,2008 | null | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the properties of two different types of infrared solutions of
Landau gauge Yang-Mills theory and argue for one of these (the 'scaling
solution'). We furthermore clarify the status of previously obtained results
from DSEs on a four-torus. Including quarks we discuss a relation between
confinement and dynamical chiral symmetry breaking based on the scaling
solution of Yang-Mills theory. An infrared singularity in the quark-gluon
vertex allows for a solution of the $U_A$(1) problem along the lines of a
mechanism suggested by Kogut and Susskind long ago.
| [
{
"created": "Tue, 14 Oct 2008 19:16:20 GMT",
"version": "v1"
}
] | 2009-03-31 | [
[
"Fischer",
"Christian S.",
""
]
] | We discuss the properties of two different types of infrared solutions of Landau gauge Yang-Mills theory and argue for one of these (the 'scaling solution'). We furthermore clarify the status of previously obtained results from DSEs on a four-torus. Including quarks we discuss a relation between confinement and dynamical chiral symmetry breaking based on the scaling solution of Yang-Mills theory. An infrared singularity in the quark-gluon vertex allows for a solution of the $U_A$(1) problem along the lines of a mechanism suggested by Kogut and Susskind long ago. |
2103.04698 | Chen Rui | Fu-Lai Wang, Xin-Dian Yang, Rui Chen, and Xiang Liu | Correlation of the hidden-charm molecular tetraquarks and the
charmoniumlike structures existing in the $B\to XYZ+K$ | 26 pages, 9 figures | Phys. Rev. D 104, 094010 (2021) | 10.1103/PhysRevD.104.094010 | null | hep-ph hep-ex | http://creativecommons.org/licenses/by/4.0/ | The molecular assignments to the three $P_c$ states and the similar
production mechanism between the $\Lambda_b\to P_c+K$ and $B\to XYZ+K$ convince
us the $B$ decaying to a charmonium state plus light mesons could be the
appropriate production process to search for the charmoniumlike molecular
tetraquarks. In this work, we systematically study the interactions between a
charmed (charmed-strange) meson and an anti-charmed (anti-charm-strange) meson,
which include the $D^{(*)}\bar{D}^{(*)}$, $\bar{D}^{(*)}\bar{D}_1$,
$D^{(*)}\bar{D}_2^*$, $D_s^{(*)}\bar{D}_s^{(*)}$, ${D}_s^{(*)}\bar{D}_{s0}^*$,
$D_s^{(*)}\bar{D}_{s1}^{\prime}$, ${D}_s^{(*)}\bar{D}_{s1}$,
$D_s^{(*)}\bar{D}_{s2}^*$ systems. After adopting the one-boson-exchange
effective potentials, our numerical results indicate that, on one hand, there
can exist a serial of isoscalar charmoniumlike $\mathcal{D}\bar{\mathcal{D}}$
and $\mathcal{D}_s\bar{\mathcal{D}}_s$ molecular states, on the other hand, we
can fully exclude the charged charmoniumlike states as the isovector
charmoniumlike molecules. Meanwhile, we discuss the two-body hidden-charm decay
channels for the obtained $\mathcal{D}\bar{\mathcal{D}}$ and
$\mathcal{D}_s\bar{\mathcal{D}}_s$ molecules, especially the $D^{*}\bar{D}^{*}$
molecular tetraquarks. By analyzing the experimental data collected from the
$B\to XYZ+K$ and the mass spectrum and two-body hidden-charm decay channels for
the obtained $\mathcal{D}\bar{\mathcal{D}}$ and
$\mathcal{D}_s\bar{\mathcal{D}}_s$ molecules, we find several possible hints of
the existence of the charmoniumlike molecular tetraquarks, i.e., a peculiar
characteristic mass spectrum of the isoscalar $D^*\bar{D}^*$ molecular systems
can be applied to identify the charmoniumlike molecule. We look forward to the
future experiments like the LHCb, Belle II, and BESIII Collaborations can test
our results with more precise experimental data.
| [
{
"created": "Mon, 8 Mar 2021 12:17:18 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Jul 2021 08:30:31 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Nov 2021 04:46:41 GMT",
"version": "v3"
}
] | 2021-11-11 | [
[
"Wang",
"Fu-Lai",
""
],
[
"Yang",
"Xin-Dian",
""
],
[
"Chen",
"Rui",
""
],
[
"Liu",
"Xiang",
""
]
] | The molecular assignments to the three $P_c$ states and the similar production mechanism between the $\Lambda_b\to P_c+K$ and $B\to XYZ+K$ convince us the $B$ decaying to a charmonium state plus light mesons could be the appropriate production process to search for the charmoniumlike molecular tetraquarks. In this work, we systematically study the interactions between a charmed (charmed-strange) meson and an anti-charmed (anti-charm-strange) meson, which include the $D^{(*)}\bar{D}^{(*)}$, $\bar{D}^{(*)}\bar{D}_1$, $D^{(*)}\bar{D}_2^*$, $D_s^{(*)}\bar{D}_s^{(*)}$, ${D}_s^{(*)}\bar{D}_{s0}^*$, $D_s^{(*)}\bar{D}_{s1}^{\prime}$, ${D}_s^{(*)}\bar{D}_{s1}$, $D_s^{(*)}\bar{D}_{s2}^*$ systems. After adopting the one-boson-exchange effective potentials, our numerical results indicate that, on one hand, there can exist a serial of isoscalar charmoniumlike $\mathcal{D}\bar{\mathcal{D}}$ and $\mathcal{D}_s\bar{\mathcal{D}}_s$ molecular states, on the other hand, we can fully exclude the charged charmoniumlike states as the isovector charmoniumlike molecules. Meanwhile, we discuss the two-body hidden-charm decay channels for the obtained $\mathcal{D}\bar{\mathcal{D}}$ and $\mathcal{D}_s\bar{\mathcal{D}}_s$ molecules, especially the $D^{*}\bar{D}^{*}$ molecular tetraquarks. By analyzing the experimental data collected from the $B\to XYZ+K$ and the mass spectrum and two-body hidden-charm decay channels for the obtained $\mathcal{D}\bar{\mathcal{D}}$ and $\mathcal{D}_s\bar{\mathcal{D}}_s$ molecules, we find several possible hints of the existence of the charmoniumlike molecular tetraquarks, i.e., a peculiar characteristic mass spectrum of the isoscalar $D^*\bar{D}^*$ molecular systems can be applied to identify the charmoniumlike molecule. We look forward to the future experiments like the LHCb, Belle II, and BESIII Collaborations can test our results with more precise experimental data. |
1001.4878 | Mauricio Bustamante | M. Bustamante (1 and 2), A.M. Gago (1), C. Pena-Garay (3) ((1) Lima,
Pont. U. Catolica, (2) Fermilab, (3) Valencia U., IFIC) | Energy-independent new physics in the flavour ratios of high-energy
astrophysical neutrinos | 28 pages, 8 figures. Fixes number of nucleon targets in ice and
Figure 8. More legible figures. Bibliography expanded. Matches version
accepted for publication in JHEP. | JHEP 1004:066,2010 | 10.1007/JHEP04(2010)066 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have studied the consequences of breaking the CPT symmetry in the neutrino
sector, using the expected high-energy neutrino flux from distant cosmological
sources such as active galaxies. For this purpose we have assumed three
different hypotheses for the neutrino production model, characterised by the
flavour fluxes at production \phi_e^0:\phi_\mu^0:\phi_\tau^0 = 1:2:0, 0:1:0,
and 1:0:0, and studied the theoretical and experimental expectations for the
muon-neutrino flux at Earth, \phi_\mu, and for the flavour ratios at Earth, R =
\phi_\mu/\phi_e and S = \phi_\tau/\phi_\mu. CPT violation (CPTV) has been
implemented by adding an energy-independent term to the standard neutrino
oscillation Hamiltonian. This introduces three new mixing angles, two new
eigenvalues and three new phases, all of which have currently unknown values.
We have varied the new mixing angles and eigenvalues within certain bounds,
together with the parameters associated to pure standard oscillations. Our
results indicate that, for the models 1:2:0 and 0:1:0, it might possible to
find large deviations for \phi_\mu, R, and S between the cases without and with
CPTV, provided the CPTV eigenvalues lie within 10^{-29}-10^{-27} GeV, or above.
Moreover, if CPTV exists, there are certain values of R and S that can be
accounted for by up to three production models. If no CPTV were observed, we
could set limits on the CPTV eigenvalues of the same order. Detection prospects
calculated using IceCube suggest that for the models 1:2:0 and 0:1:0, the
modifications due to CPTV are larger and more clearly separable from the
standard-oscillations predictions. We conclude that IceCube is potentially able
to detect CPTV but that, depending on the values of the CPTV parameters, there
could be a mis-determination of the neutrino production model.
| [
{
"created": "Wed, 27 Jan 2010 09:26:58 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Apr 2010 17:46:32 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Bustamante",
"M.",
"",
"1 and 2"
],
[
"Gago",
"A. M.",
""
],
[
"Pena-Garay",
"C.",
""
]
] | We have studied the consequences of breaking the CPT symmetry in the neutrino sector, using the expected high-energy neutrino flux from distant cosmological sources such as active galaxies. For this purpose we have assumed three different hypotheses for the neutrino production model, characterised by the flavour fluxes at production \phi_e^0:\phi_\mu^0:\phi_\tau^0 = 1:2:0, 0:1:0, and 1:0:0, and studied the theoretical and experimental expectations for the muon-neutrino flux at Earth, \phi_\mu, and for the flavour ratios at Earth, R = \phi_\mu/\phi_e and S = \phi_\tau/\phi_\mu. CPT violation (CPTV) has been implemented by adding an energy-independent term to the standard neutrino oscillation Hamiltonian. This introduces three new mixing angles, two new eigenvalues and three new phases, all of which have currently unknown values. We have varied the new mixing angles and eigenvalues within certain bounds, together with the parameters associated to pure standard oscillations. Our results indicate that, for the models 1:2:0 and 0:1:0, it might possible to find large deviations for \phi_\mu, R, and S between the cases without and with CPTV, provided the CPTV eigenvalues lie within 10^{-29}-10^{-27} GeV, or above. Moreover, if CPTV exists, there are certain values of R and S that can be accounted for by up to three production models. If no CPTV were observed, we could set limits on the CPTV eigenvalues of the same order. Detection prospects calculated using IceCube suggest that for the models 1:2:0 and 0:1:0, the modifications due to CPTV are larger and more clearly separable from the standard-oscillations predictions. We conclude that IceCube is potentially able to detect CPTV but that, depending on the values of the CPTV parameters, there could be a mis-determination of the neutrino production model. |
1906.01954 | Roman Poberezhnyuk | R. Poberezhnyuk, V. Vovchenko, A. Motornenko, M. I. Gorenstein, H.
Stoecker | Chemical freeze-out conditions and fluctuations of conserved charges in
heavy-ion collisions within quantum van der Waals model | 20 pages, 21 figures | Phys. Rev. C 100, 054904 (2019) | 10.1103/PhysRevC.100.054904 | null | hep-ph nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The chemical freeze-out parameters in central nucleus-nucleus collisions are
extracted consistently from hadron yield data within the quantum van der Waals
(QvdW) hadron resonance gas model. The beam energy dependences for skewness and
kurtosis of net baryon, net electric, and net strangeness charges are
predicted. The QvdW interactions in asymmetric matter, $Q/B \neq 0.5$, between
(anti)baryons yield a non-congruent liquid-gas phase transition, together with
a nuclear critical point (CP) with critical temperature of $T_c=19.5$ MeV. The
nuclear CP yields the collision energy dependence of the skewness and the
kurtosis to both deviate significantly from the ideal hadron resonance gas
baseline predictions even far away, in $(T,\mu_B)$-plane, from the CP. These
predictions can readily be tested by STAR and NA61/SHINE Collaborations at the
RHIC BNL and the SPS CERN, respectively, and by HADES at GSI. The results
presented here offer a broad opportunity for the search for signals of phase
transition in dense hadronic matter at the future NICA and FAIR high intensity
facilities.
| [
{
"created": "Wed, 5 Jun 2019 11:41:11 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Oct 2019 18:33:43 GMT",
"version": "v2"
}
] | 2019-11-20 | [
[
"Poberezhnyuk",
"R.",
""
],
[
"Vovchenko",
"V.",
""
],
[
"Motornenko",
"A.",
""
],
[
"Gorenstein",
"M. I.",
""
],
[
"Stoecker",
"H.",
""
]
] | The chemical freeze-out parameters in central nucleus-nucleus collisions are extracted consistently from hadron yield data within the quantum van der Waals (QvdW) hadron resonance gas model. The beam energy dependences for skewness and kurtosis of net baryon, net electric, and net strangeness charges are predicted. The QvdW interactions in asymmetric matter, $Q/B \neq 0.5$, between (anti)baryons yield a non-congruent liquid-gas phase transition, together with a nuclear critical point (CP) with critical temperature of $T_c=19.5$ MeV. The nuclear CP yields the collision energy dependence of the skewness and the kurtosis to both deviate significantly from the ideal hadron resonance gas baseline predictions even far away, in $(T,\mu_B)$-plane, from the CP. These predictions can readily be tested by STAR and NA61/SHINE Collaborations at the RHIC BNL and the SPS CERN, respectively, and by HADES at GSI. The results presented here offer a broad opportunity for the search for signals of phase transition in dense hadronic matter at the future NICA and FAIR high intensity facilities. |
2306.13320 | Michael Edmund Tobar | Michael E. Tobar, Anton V. Sokolov, Andreas Ringwald, Maxim Goryachev | Searching for GUT-scale QCD Axions and Monopoles with a High Voltage
Capacitor | Accepted version: For publication in Physical Review D | Physical Review D 108, 035024 (2023) | 10.1103/PhysRevD.108.035024 | DESY-23-084 | hep-ph astro-ph.IM gr-qc physics.ins-det | http://creativecommons.org/licenses/by/4.0/ | The QCD axion has been postulated to exist because it solves the strong CP
problem. Furthermore, if it exists axions should be created in the early
Universe and could account for all the observed dark matter. In particular,
axion masses of order $10^{-10}$ to $10^{-7}$ eV correspond to axions in the
vicinity of the GUT-scale. In this mass range many experiments have been
proposed to search for the axion through the standard QED coupling parameter
$g_{a\gamma\gamma}$. Recently axion electrodynamics has been expanded to
include two more coupling parameters, $g_{aEM}$ and $g_{aMM}$, which could
arise if heavy magnetic monopoles exist. In this work we show that both
$g_{aMM}$ and $g_{aEM}$ may be searched for using a high voltage capacitor.
Since the experiment is not sensitive to $g_{a\gamma\gamma}$, it gives a new
way to search for effects of heavy monopoles if the GUT-scale axion is shown to
exist, or to simultaneously search for both the axion and the monopole at the
same time.
| [
{
"created": "Fri, 23 Jun 2023 06:45:19 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Aug 2023 03:48:39 GMT",
"version": "v2"
}
] | 2023-09-14 | [
[
"Tobar",
"Michael E.",
""
],
[
"Sokolov",
"Anton V.",
""
],
[
"Ringwald",
"Andreas",
""
],
[
"Goryachev",
"Maxim",
""
]
] | The QCD axion has been postulated to exist because it solves the strong CP problem. Furthermore, if it exists axions should be created in the early Universe and could account for all the observed dark matter. In particular, axion masses of order $10^{-10}$ to $10^{-7}$ eV correspond to axions in the vicinity of the GUT-scale. In this mass range many experiments have been proposed to search for the axion through the standard QED coupling parameter $g_{a\gamma\gamma}$. Recently axion electrodynamics has been expanded to include two more coupling parameters, $g_{aEM}$ and $g_{aMM}$, which could arise if heavy magnetic monopoles exist. In this work we show that both $g_{aMM}$ and $g_{aEM}$ may be searched for using a high voltage capacitor. Since the experiment is not sensitive to $g_{a\gamma\gamma}$, it gives a new way to search for effects of heavy monopoles if the GUT-scale axion is shown to exist, or to simultaneously search for both the axion and the monopole at the same time. |
2009.03742 | Christian Br{\o}nnum-Hansen | Christian Br{\o}nnum-Hansen and Chen-Yu Wang | Contribution of third generation quarks to two-loop helicity amplitudes
for W boson pair production in gluon fusion | null | null | 10.1007/JHEP01(2021)170 | TTP20-031, P3H-20-045 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the contribution of third generation quarks ($t,\ b$) to the
two-loop amplitude for on-shell $W$ boson pair production in gluon fusion $gg
\to WW$. We present plots for the amplitude across partonic phase space as well
as reference values for two kinematic points. The master integrals are
efficiently evaluated by numerically solving a system of ordinary differential
equations.
| [
{
"created": "Tue, 8 Sep 2020 13:36:02 GMT",
"version": "v1"
}
] | 2021-02-24 | [
[
"Brønnum-Hansen",
"Christian",
""
],
[
"Wang",
"Chen-Yu",
""
]
] | We compute the contribution of third generation quarks ($t,\ b$) to the two-loop amplitude for on-shell $W$ boson pair production in gluon fusion $gg \to WW$. We present plots for the amplitude across partonic phase space as well as reference values for two kinematic points. The master integrals are efficiently evaluated by numerically solving a system of ordinary differential equations. |
hep-ph/0403048 | Antonio Pich | A. Pich | Chiral loop corrections and isospin violation effects in
epsilon'/epsilon | 6 pages. Proc. 10th International QCD Conference (QCD 03),
Montpellier, France, 2-9 July 2003. Nucl. Phys. B (Proc. Suppl.) (2004) in
press | Nucl.Phys.Proc.Suppl.133:233-238,2004 | 10.1016/j.nuclphysbps.2004.04.171 | IFIC/04-18, FTUV/04-0305 | hep-ph | null | A complete analysis of isospin breaking in $K\to 2\pi$ amplitudes, including
both strong and electromagnetic corrections at next-to-leading order in chiral
perturbation theory, has been achieved recently. We discuss the implication of
these effects, together with the previously known chiral loop corrections, on
the direct CP-violating ratio epsilon'/epsilon.
| [
{
"created": "Thu, 4 Mar 2004 16:39:15 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Pich",
"A.",
""
]
] | A complete analysis of isospin breaking in $K\to 2\pi$ amplitudes, including both strong and electromagnetic corrections at next-to-leading order in chiral perturbation theory, has been achieved recently. We discuss the implication of these effects, together with the previously known chiral loop corrections, on the direct CP-violating ratio epsilon'/epsilon. |
1110.6235 | Yu-Dai Tsai | Yu-Dai Tsai, Hsiang-nan Li, Qiang Zhao | $\eta_c$ mixing effects on charmonium and $B$ meson decays | 12 pages, version to appear in PRD | Phys. Rev. D 85, 034002 (2012) | 10.1103/PhysRevD.85.034002 | null | hep-ph hep-ex | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We include the $\eta_c$ meson into the $\eta$-$\eta'$-$G$ mixing formalism
constructed in our previous work, where $G$ represents the pseudoscalar
gluball. The mixing angles in this tetramixing matrix are constrained by
theoretical and experimental implications from relevant hadronic processes.
Especially, the angle between $\eta_c$ and $G$ is found to be about $11^\circ$
from the measured decay widths of the $\eta_c$ meson. The pseudoscalar glueball
mass $m_G$, the pseudoscalar densities $m_{qq,ss,cc}$ and the U(1) anomaly
matrix elements associated with the mixed states are solved from the anomalous
Ward identities. The solution $m_G\approx 1.4$ GeV obtained from the
$\eta$-$\eta'$-$G$ mixing is confirmed, while $m_{qq}$ grows to above the pion
mass, and thus increases perturbative QCD predictions for the branching ratios
$Br(B\to\eta'K)$. We then analyze the $\eta_c$-mixing effects on charmonium
magnetic dipole transitions, and on the $B\to\eta^{(\prime)}K_S$ branching
ratios and CP asymmetries, which further improve the consistency between
theoretical predictions and data. A predominant observation is that the
$\eta_c$ mixing enhances the perturbative QCD predictions for $Br(B\to\eta'K)$
by 18%, but does not alter those for $Br(B\to\eta K)$. The puzzle due to the
large $Br(B\to\eta'K)$ data is then resolved.
| [
{
"created": "Fri, 28 Oct 2011 02:33:06 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Jan 2012 17:03:52 GMT",
"version": "v2"
}
] | 2012-02-07 | [
[
"Tsai",
"Yu-Dai",
""
],
[
"Li",
"Hsiang-nan",
""
],
[
"Zhao",
"Qiang",
""
]
] | We include the $\eta_c$ meson into the $\eta$-$\eta'$-$G$ mixing formalism constructed in our previous work, where $G$ represents the pseudoscalar gluball. The mixing angles in this tetramixing matrix are constrained by theoretical and experimental implications from relevant hadronic processes. Especially, the angle between $\eta_c$ and $G$ is found to be about $11^\circ$ from the measured decay widths of the $\eta_c$ meson. The pseudoscalar glueball mass $m_G$, the pseudoscalar densities $m_{qq,ss,cc}$ and the U(1) anomaly matrix elements associated with the mixed states are solved from the anomalous Ward identities. The solution $m_G\approx 1.4$ GeV obtained from the $\eta$-$\eta'$-$G$ mixing is confirmed, while $m_{qq}$ grows to above the pion mass, and thus increases perturbative QCD predictions for the branching ratios $Br(B\to\eta'K)$. We then analyze the $\eta_c$-mixing effects on charmonium magnetic dipole transitions, and on the $B\to\eta^{(\prime)}K_S$ branching ratios and CP asymmetries, which further improve the consistency between theoretical predictions and data. A predominant observation is that the $\eta_c$ mixing enhances the perturbative QCD predictions for $Br(B\to\eta'K)$ by 18%, but does not alter those for $Br(B\to\eta K)$. The puzzle due to the large $Br(B\to\eta'K)$ data is then resolved. |
hep-ph/9605232 | Yousuf Musakhanov | M.M. Musakhanov, F. C. Khanna | The axial anomaly and the conversion of gluons into photons | gzip, tar, latex, 11 pages, 2 eps figures | null | null | Talk given at the Lake Louise Winter Institute, 18-24 February 1996 | hep-ph | null | The axial anomaly in the divergence of the singlet axial current in QCD $+$
QED leads to low-energy theorems for the matrix element of this operator
equation over vacuum and two--photon states and for the matrix element over
vacuum and two--gluon states. The solution of these theorems is related only to
the nonperturbative phenomena. These matrix elements are calculated in
instanton vacuum generated N-JL type quark model for arbitrary $N_f .$ It is
shown that this model does satisfy the low-energy theorems.
| [
{
"created": "Mon, 6 May 1996 17:52:06 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Musakhanov",
"M. M.",
""
],
[
"Khanna",
"F. C.",
""
]
] | The axial anomaly in the divergence of the singlet axial current in QCD $+$ QED leads to low-energy theorems for the matrix element of this operator equation over vacuum and two--photon states and for the matrix element over vacuum and two--gluon states. The solution of these theorems is related only to the nonperturbative phenomena. These matrix elements are calculated in instanton vacuum generated N-JL type quark model for arbitrary $N_f .$ It is shown that this model does satisfy the low-energy theorems. |
1711.10728 | Zhi-Gang Wang | Jun-Xia Zhang, Zhi-Gang Wang, Zun-Yan Di | Analysis of the $\frac{3}{2}^{\pm}$ pentaquark states in the diquark
model with QCD sum rules | 14 pages, 8 figures | Acta Phys.Polon. B48 (2017) 2013 | 10.5506/APhysPolB.48.2013 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we construct the
scalar-diquark-axialvector-diquark-antiquark type interpolating currents, and
study the masses and pole residues of the $J^{P}=\frac{3}{2}^{\pm}$
hidden-charmed pentaquark states with the QCD sum rules. In calculations, we
use the formula $\mu=\sqrt{M^2_{P}-(2{\mathbb{M}}_c)^2}$ to determine the
energy scales of the QCD spectral densities. We obtain the masses of the
hidden-charm pentaquark states with the strangeness $S=-1$ and $S=-2$, which
can be confronted to the experimental data in the future.
| [
{
"created": "Wed, 29 Nov 2017 08:52:01 GMT",
"version": "v1"
}
] | 2017-12-13 | [
[
"Zhang",
"Jun-Xia",
""
],
[
"Wang",
"Zhi-Gang",
""
],
[
"Di",
"Zun-Yan",
""
]
] | In this article, we construct the scalar-diquark-axialvector-diquark-antiquark type interpolating currents, and study the masses and pole residues of the $J^{P}=\frac{3}{2}^{\pm}$ hidden-charmed pentaquark states with the QCD sum rules. In calculations, we use the formula $\mu=\sqrt{M^2_{P}-(2{\mathbb{M}}_c)^2}$ to determine the energy scales of the QCD spectral densities. We obtain the masses of the hidden-charm pentaquark states with the strangeness $S=-1$ and $S=-2$, which can be confronted to the experimental data in the future. |
1109.1500 | Matteo Cacciari | Matteo Cacciari | Heavy quarks, from discovery to precision | 7 pages, talk given at "Rencontres de Physique de la Vallee d'Aoste",
La Thuile, Italy, March 2011, in honour of Mario Greco's 70th birthday. To
appear in the Proceedings | null | 10.1393/ncc/i2012-11112-2 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The discoveries of the heavy quarks are briefly reviewed, with a focus on the
role played by Mario Greco in the interpretation of the experimental
observations, and on his contributions to heavy quark precision phenomenology.
| [
{
"created": "Wed, 7 Sep 2011 15:54:32 GMT",
"version": "v1"
}
] | 2022-03-02 | [
[
"Cacciari",
"Matteo",
""
]
] | The discoveries of the heavy quarks are briefly reviewed, with a focus on the role played by Mario Greco in the interpretation of the experimental observations, and on his contributions to heavy quark precision phenomenology. |
hep-ph/0011037 | Vladimir Bytiev | E.Bartos, V.Bytev, E.Kuraev | P-violating effects in low-energy Compton scattering | 4 pages, Latex, no figures | null | null | null | hep-ph | null | Parity of effects induced by one loop corrections of Standard model of
Compton scattering are considered. We note the main effects arise from W
contributions. Keeping in the mind scheme independent gauge invariance
amplitude we calculated the one spin asymmetries for the case when initial
electron is polarized and the case of circular polarized photon. They are of
order $10^{-13}$.
| [
{
"created": "Thu, 2 Nov 2000 15:36:01 GMT",
"version": "v1"
}
] | 2016-09-06 | [
[
"Bartos",
"E.",
""
],
[
"Bytev",
"V.",
""
],
[
"Kuraev",
"E.",
""
]
] | Parity of effects induced by one loop corrections of Standard model of Compton scattering are considered. We note the main effects arise from W contributions. Keeping in the mind scheme independent gauge invariance amplitude we calculated the one spin asymmetries for the case when initial electron is polarized and the case of circular polarized photon. They are of order $10^{-13}$. |
1105.6214 | Oleg Selyugin | O.V. Selyugin | Gravitation interaction with extra dimension and periodic structure of
the hadron scattering amplitude | 9 pages, 8 figures, talk on the Intern. Workshop "Bogoliubov
Readings", Dubna (2010); updated references | Modern Physics Letters A, v. 26 (2011) | 10.1142/S0217732311036504 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The behavior of the hadron scattering amplitude determined by the gravitation
interaction of hadron at high energies with impact of the KK-modes in d-brane
models of gravity is examined. The possible periodic structure of the
scattering amplitude and its dependence on the number of additional dimensions
are analyzed. The effects of the gravitational hadron form factors obtained
from the hadron eneralized parton distributions (GPDs) on the behavior of the
interaction potential and the scattering amplitude are analyzed. It is shown
that in most part the periodic structure comes from the approximation of our
calculations.
| [
{
"created": "Tue, 31 May 2011 09:20:04 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Oct 2011 09:43:06 GMT",
"version": "v2"
}
] | 2015-05-28 | [
[
"Selyugin",
"O. V.",
""
]
] | The behavior of the hadron scattering amplitude determined by the gravitation interaction of hadron at high energies with impact of the KK-modes in d-brane models of gravity is examined. The possible periodic structure of the scattering amplitude and its dependence on the number of additional dimensions are analyzed. The effects of the gravitational hadron form factors obtained from the hadron eneralized parton distributions (GPDs) on the behavior of the interaction potential and the scattering amplitude are analyzed. It is shown that in most part the periodic structure comes from the approximation of our calculations. |
1210.4125 | Piotr Zenczykowski | Piotr Zenczykowski | Remark on Koide's Z3-symmetric parametrization of quark masses | 6 pages, 1 figure, minor improvements in wording | null | 10.1103/PhysRevD.86.117303 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The charged lepton masses may be parametrized in a Z3-symmetric language
appropriate to the discussions of Koide's formula. The phase parameter \delta_L
appearing in this parametrization is experimentally indistinguishable from 2/9.
We analyse Koide's parametrization for the up (U) and down (D) quarks and argue
that the data are suggestive of the low-energy values \delta_U=\delta_L/3=2/27
and \delta_D=2\delta_L/3=4/27.
| [
{
"created": "Thu, 11 Oct 2012 12:22:59 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Oct 2012 16:43:07 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Zenczykowski",
"Piotr",
""
]
] | The charged lepton masses may be parametrized in a Z3-symmetric language appropriate to the discussions of Koide's formula. The phase parameter \delta_L appearing in this parametrization is experimentally indistinguishable from 2/9. We analyse Koide's parametrization for the up (U) and down (D) quarks and argue that the data are suggestive of the low-energy values \delta_U=\delta_L/3=2/27 and \delta_D=2\delta_L/3=4/27. |
1904.04394 | Martin Hentschinski | A. Arroyo Garcia, M. Hentschinski, K. Kutak | QCD evolution based evidence for the onset of gluon saturation in
exclusive photo-production of vector mesons | 14 pages, 6 figures; references updated | null | 10.1016/j.physletb.2019.06.061 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate photo-production of vector mesons J/Psi and Upsilon measured
both at HERA and LHC, using 2 particular fits of inclusive unintegrated gluon
distributions, based on non-linear Balitsky-Kovchegov evolution (Kutak-Sapeta
gluon; KS) and next-to-leading order Balitsky-Fadin-Kuraev-Lipatov evolution
(Hentschinski-Sabio Vera-Salas gluon; HSS). We find that linear next-to-leading
order evolution can only describe production at highest energies, if
perturbative corrections are increased to unnaturally large values; rendering
this corrections to a perturbative size, the growth with energy is too strong
and the description fails. At the same time, the KS gluon, which we explore
both with and without non-linear corrections, requires the latter to achieve an
accurate description of the energy dependence of data. We interpret this
observation as a clear signal for the presence of high gluon densities in the
proton, characteristic for the onset of gluon saturation.
| [
{
"created": "Mon, 8 Apr 2019 23:26:57 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Aug 2019 15:47:30 GMT",
"version": "v2"
}
] | 2019-08-02 | [
[
"Garcia",
"A. Arroyo",
""
],
[
"Hentschinski",
"M.",
""
],
[
"Kutak",
"K.",
""
]
] | We investigate photo-production of vector mesons J/Psi and Upsilon measured both at HERA and LHC, using 2 particular fits of inclusive unintegrated gluon distributions, based on non-linear Balitsky-Kovchegov evolution (Kutak-Sapeta gluon; KS) and next-to-leading order Balitsky-Fadin-Kuraev-Lipatov evolution (Hentschinski-Sabio Vera-Salas gluon; HSS). We find that linear next-to-leading order evolution can only describe production at highest energies, if perturbative corrections are increased to unnaturally large values; rendering this corrections to a perturbative size, the growth with energy is too strong and the description fails. At the same time, the KS gluon, which we explore both with and without non-linear corrections, requires the latter to achieve an accurate description of the energy dependence of data. We interpret this observation as a clear signal for the presence of high gluon densities in the proton, characteristic for the onset of gluon saturation. |
1612.04843 | Patrick Huber | Patrick Huber | Prospects for neutrino oscillation parameters | 7 pages, proceedings for NOW2016 | null | null | null | hep-ph hep-ex nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this contribution we discuss the future of the global long-baseline
neutrino oscillation program. The case is made that our current lack of
understanding of neutrino-nucleus interactions is a serious challenge which
will need to be met with new experimental initiatives in neutrino scattering.
| [
{
"created": "Wed, 14 Dec 2016 21:17:13 GMT",
"version": "v1"
}
] | 2016-12-16 | [
[
"Huber",
"Patrick",
""
]
] | In this contribution we discuss the future of the global long-baseline neutrino oscillation program. The case is made that our current lack of understanding of neutrino-nucleus interactions is a serious challenge which will need to be met with new experimental initiatives in neutrino scattering. |
hep-ph/9806312 | S. Nandi | Duane A. Dicus, S. Gibbons and S. Nandi | Collider Production of Spin 3/2 Particles | 9 pages, 5 figures | null | null | DOE-ER-40757-109, OSU-HEP-98-3, UTEXAS-HEP-98-2 | hep-ph | null | We consider the production of spin 3/2 quarks in hadron-hadron and
photon-photon colliders. The cross sections at LHC energy is large enough to
observe such exotic quarks up to a mass of a few TeV.
| [
{
"created": "Mon, 8 Jun 1998 21:52:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dicus",
"Duane A.",
""
],
[
"Gibbons",
"S.",
""
],
[
"Nandi",
"S.",
""
]
] | We consider the production of spin 3/2 quarks in hadron-hadron and photon-photon colliders. The cross sections at LHC energy is large enough to observe such exotic quarks up to a mass of a few TeV. |
2405.09599 | Yu Hamada | Yu Hamada and Wakutaka Nakano | Gravitational wave spectrum from expanding string loops on domain walls:
Implication to nano-hertz pulsar timing array signal | 32 pages, 8 figures, v2: minor changes | null | null | KEK-TH-2619, DESY-24-067 | hep-ph astro-ph.CO gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analytically calculate the spectrum of stochastic gravitational waves
(GWs) emitted by expanding string loops on domain walls in the scenario where
domain walls decay by nucleation of string loops. By introducing macroscopic
parameters characterizing the nucleation of the loops, the stochastic GW
spectrum is derived in a way that is independent of the details of particle
physics models. In contrast to GWs emitted from bubble collisions of the false
vacuum decay, the string loops do radiate GWs even when they are perfectly
circular before their collisions, resulting in that more and more contribution
to the spectrum comes from the smaller and smaller loops compared to the
typical size of the collided loops. Consequently, the spectrum is linearly
proportional to the frequency at the high-frequency region, which is peculiar
to this GW source. Furthermore, the results are compared with the recent
nano-Hertz pulsar timing array signal, as well as the projected sensitivity
curves of future gravitational wave observatories.
| [
{
"created": "Wed, 15 May 2024 14:07:11 GMT",
"version": "v1"
},
{
"created": "Fri, 31 May 2024 16:31:07 GMT",
"version": "v2"
}
] | 2024-06-10 | [
[
"Hamada",
"Yu",
""
],
[
"Nakano",
"Wakutaka",
""
]
] | We analytically calculate the spectrum of stochastic gravitational waves (GWs) emitted by expanding string loops on domain walls in the scenario where domain walls decay by nucleation of string loops. By introducing macroscopic parameters characterizing the nucleation of the loops, the stochastic GW spectrum is derived in a way that is independent of the details of particle physics models. In contrast to GWs emitted from bubble collisions of the false vacuum decay, the string loops do radiate GWs even when they are perfectly circular before their collisions, resulting in that more and more contribution to the spectrum comes from the smaller and smaller loops compared to the typical size of the collided loops. Consequently, the spectrum is linearly proportional to the frequency at the high-frequency region, which is peculiar to this GW source. Furthermore, the results are compared with the recent nano-Hertz pulsar timing array signal, as well as the projected sensitivity curves of future gravitational wave observatories. |
hep-ph/9809286 | Hyungdo Kim | Kiwoon Choi and Hyungdo Kim | Small Instanton Contribution to the Axion Potential in Supersymmetric
Models | revtex, 19 pages, 2 tables | Phys.Rev.D59:072001,1999 | 10.1103/PhysRevD.59.072001 | KAIST-TH 98/18 | hep-ph | null | Small size QCD instantons may spoil the axion solution to the strong CP
problem if QCD is not asymptotically free at high energy scales. We examine
this issue in supersymmetric models using a manifestly supersymmetric scheme to
compute the axion potential induced by small size instantons. Applying this
scheme for a class of illustrative models, it is found that the resulting high
energy axion potential is highly model-dependent, but suppressed by more powers
of the soft supersymmetry breaking parameters and/or of the other small mass
scales than what is expected based on a naive instanton graph analysis. Our
analysis suggests that the axion solution is stable against the small QCD
instanton effects in a wide class of supersymmetric models even when QCD is not
asymtotically free at high energy scales.
| [
{
"created": "Mon, 7 Sep 1998 11:00:52 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Choi",
"Kiwoon",
""
],
[
"Kim",
"Hyungdo",
""
]
] | Small size QCD instantons may spoil the axion solution to the strong CP problem if QCD is not asymptotically free at high energy scales. We examine this issue in supersymmetric models using a manifestly supersymmetric scheme to compute the axion potential induced by small size instantons. Applying this scheme for a class of illustrative models, it is found that the resulting high energy axion potential is highly model-dependent, but suppressed by more powers of the soft supersymmetry breaking parameters and/or of the other small mass scales than what is expected based on a naive instanton graph analysis. Our analysis suggests that the axion solution is stable against the small QCD instanton effects in a wide class of supersymmetric models even when QCD is not asymtotically free at high energy scales. |
hep-ph/9807364 | Joao P. Silva | A. Amorim, Mario G. Santos and Joao P. Silva | New CP-violating parameters in cascade decays | 22 pages, latex, 5 figures, corrected missing signs in the discussion
of the CP conservation limit | Phys.Rev. D59 (1999) 056001 | 10.1103/PhysRevD.59.056001 | CFNUL/98-07 | hep-ph | null | We consider decay chains of the type P -> M + ... -> f + ..., where M is a
neutral meson that may mix with its antiparticle Mbar, before decaying into the
final state f. P may be either a heavier neutral meson or a charged meson. We
perform a rephasing-invariant analysis of the quantities that show up in such
cascade decays. If the decay P -> M + ... (or the decay P -> Mbar + ...) is
forbidden, we find the usual lambda_f parameters describing the interference
between the mixing of a neutral meson system and the decay from that system
into the final state f. However, when both the P -> M + ... and P -> Mbar + ...
decays are allowed, we find a new class of rephasing-invariant parameters,
xi_i, that measure the interference between the mixing of a neutral meson
system and the decay from the initial state *into that system*. We show that
the quantities lambda_f and xi_i are necessary and sufficient to describe all
the interference effects present in the most general cascade decay. We discuss
the various cascade decays in turn, highlighting the special features of each
one.
| [
{
"created": "Mon, 13 Jul 1998 22:14:53 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Sep 1998 19:54:07 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Amorim",
"A.",
""
],
[
"Santos",
"Mario G.",
""
],
[
"Silva",
"Joao P.",
""
]
] | We consider decay chains of the type P -> M + ... -> f + ..., where M is a neutral meson that may mix with its antiparticle Mbar, before decaying into the final state f. P may be either a heavier neutral meson or a charged meson. We perform a rephasing-invariant analysis of the quantities that show up in such cascade decays. If the decay P -> M + ... (or the decay P -> Mbar + ...) is forbidden, we find the usual lambda_f parameters describing the interference between the mixing of a neutral meson system and the decay from that system into the final state f. However, when both the P -> M + ... and P -> Mbar + ... decays are allowed, we find a new class of rephasing-invariant parameters, xi_i, that measure the interference between the mixing of a neutral meson system and the decay from the initial state *into that system*. We show that the quantities lambda_f and xi_i are necessary and sufficient to describe all the interference effects present in the most general cascade decay. We discuss the various cascade decays in turn, highlighting the special features of each one. |
2311.14389 | Aditya Pathak | Jack Holguin, Ian Moult, Aditya Pathak, Massimiliano Procura, Robert
Sch\"ofbeck, Dennis Schwarz | Precision Top Mass Measurement Using Energy Correlators | 6 pages, 5 figures, Proceedings of the European Physical Society
Conference on High Energy Physics (EPS-HEP2023) 21-25 August 2023, Hamburg,
Germany | null | null | DESY-23-189 | hep-ph hep-ex | http://creativecommons.org/licenses/by/4.0/ | Precision top mass measurements at hadron colliders have been notoriously
difficult. The fundamental challenge in the current approaches lies in
achieving simultaneously high top mass sensitivity and good theoretical
control. Inspired by the use of standard candles in cosmology, we overcome this
problem by showing that a single energy correlator-based observable can be
constructed that reflects the characteristic angular scales associated with
both the $W$-boson and top quark. This gives direct access to the dimensionless
quantity $m_{t}/m_{W}$, from which $m_{t}$ can be extracted in a well-defined
short-distance mass scheme as a function of the well-known $m_{W}$. A
Monte-Carlo-based study is performed to demonstrate the properties of our
observable and the statistical feasibility of its extraction from the Run 2 and
3 and High-Luminosity LHC data sets. The resulting $m_t$ has remarkably small
uncertainties from hadronization effects and is insensitive to the underlying
event and parton distribution functions.
Our proposed observable provides a road map for a rich program to achieve a
top mass determination at the LHC with record precision.
| [
{
"created": "Fri, 24 Nov 2023 10:10:37 GMT",
"version": "v1"
}
] | 2023-11-27 | [
[
"Holguin",
"Jack",
""
],
[
"Moult",
"Ian",
""
],
[
"Pathak",
"Aditya",
""
],
[
"Procura",
"Massimiliano",
""
],
[
"Schöfbeck",
"Robert",
""
],
[
"Schwarz",
"Dennis",
""
]
] | Precision top mass measurements at hadron colliders have been notoriously difficult. The fundamental challenge in the current approaches lies in achieving simultaneously high top mass sensitivity and good theoretical control. Inspired by the use of standard candles in cosmology, we overcome this problem by showing that a single energy correlator-based observable can be constructed that reflects the characteristic angular scales associated with both the $W$-boson and top quark. This gives direct access to the dimensionless quantity $m_{t}/m_{W}$, from which $m_{t}$ can be extracted in a well-defined short-distance mass scheme as a function of the well-known $m_{W}$. A Monte-Carlo-based study is performed to demonstrate the properties of our observable and the statistical feasibility of its extraction from the Run 2 and 3 and High-Luminosity LHC data sets. The resulting $m_t$ has remarkably small uncertainties from hadronization effects and is insensitive to the underlying event and parton distribution functions. Our proposed observable provides a road map for a rich program to achieve a top mass determination at the LHC with record precision. |
hep-ph/0610325 | Mary Hall Reno | M. H. Reno (University of Iowa), I. Sarcevic and J. Uscinski
(University of Arizona) | Weak interactions and quasi-stable particle energy loss | 4 pages, 4 figures, to appear in the proceedings of the Second
Workshop on TeV Particle Astrophysics (August 2006, Madison, WI) | J.Phys.Conf.Ser.60:203-206,2007 | 10.1088/1742-6596/60/1/042 | null | hep-ph | null | We discuss the interplay between electromagnetic energy loss and weak
interactions in the context of quasistable particle particle propagation
through materials. As specific examples, we consider staus, where weak
interactions may play a role, and taus, where they don't.
| [
{
"created": "Tue, 24 Oct 2006 21:24:43 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Reno",
"M. H.",
"",
"University of Iowa"
],
[
"Sarcevic",
"I.",
"",
"University of Arizona"
],
[
"Uscinski",
"J.",
"",
"University of Arizona"
]
] | We discuss the interplay between electromagnetic energy loss and weak interactions in the context of quasistable particle particle propagation through materials. As specific examples, we consider staus, where weak interactions may play a role, and taus, where they don't. |
1109.0031 | C. A. de S. Pires | J. G. Ferreira Jr, P. R. D. Pinheiro, C. A. de S. Pires, P. S.
Rodrigues da Silva | The minimal 3-3-1 model with only two Higgs triplets | about 20 pages, no figure | Phys. Rev. D 84, 095019 (2011) | 10.1103/PhysRevD.84.095019 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The simplest non-abelian gauge extension of the electroweak standard model,
the $SU(3)_c\otimes SU(3)_L\otimes U(1)_N$, known as 3-3-1 model, has a minimal
version which demands the least possible fermionic content to account for the
whole established phenomenology for the well known particles and interactions.
Nevertheless, in its original form the minimal 3-3-1 model was proposed with a
set of three scalar triplets and one sextet in order to yield the spontaneous
breaking of the gauge symmetry and generate the observed fermion masses. Such a
huge scalar sector turns the task of clearly identifying the physical scalar
spectrum a clumsy labor. It not only adds an obstacle for the development of
its phenomenology but implies a scalar potential plagued with new free coupling
constants. In this work we show that the framework of the minimal 3-3-1 model
can be built with only two scalar triplets, but still triggering the desired
pattern of spontaneous symmetry breaking and generating the correct fermion
masses. We present the exact physical spectrum and also show all the
interactions involving the scalars, obtaining a neat minimal 3-3-1 model far
more suited for phenomenological studies at the current Large Hadron Collider.
| [
{
"created": "Wed, 31 Aug 2011 20:34:55 GMT",
"version": "v1"
}
] | 2013-08-14 | [
[
"Ferreira",
"J. G.",
"Jr"
],
[
"Pinheiro",
"P. R. D.",
""
],
[
"Pires",
"C. A. de S.",
""
],
[
"da Silva",
"P. S. Rodrigues",
""
]
] | The simplest non-abelian gauge extension of the electroweak standard model, the $SU(3)_c\otimes SU(3)_L\otimes U(1)_N$, known as 3-3-1 model, has a minimal version which demands the least possible fermionic content to account for the whole established phenomenology for the well known particles and interactions. Nevertheless, in its original form the minimal 3-3-1 model was proposed with a set of three scalar triplets and one sextet in order to yield the spontaneous breaking of the gauge symmetry and generate the observed fermion masses. Such a huge scalar sector turns the task of clearly identifying the physical scalar spectrum a clumsy labor. It not only adds an obstacle for the development of its phenomenology but implies a scalar potential plagued with new free coupling constants. In this work we show that the framework of the minimal 3-3-1 model can be built with only two scalar triplets, but still triggering the desired pattern of spontaneous symmetry breaking and generating the correct fermion masses. We present the exact physical spectrum and also show all the interactions involving the scalars, obtaining a neat minimal 3-3-1 model far more suited for phenomenological studies at the current Large Hadron Collider. |
hep-ph/0011396 | Jonathan R. Ellis | John Ellis (CERN) | Highlights of CP 2000 | 12 pages, 6 figures, talk at International Conference On CP Violation
Physics, Ferrara, Sept. 2000 | Nucl.Phys.Proc.Suppl.99B:331-342,2001 | 10.1016/S0920-5632(01)80043-8 | CERN-TH/2000-297 | hep-ph | null | Various developing topics in CP violation are reviewed. There are many
theoretical reasons to hope that the CKM paradigm may be incomplete. It is
surely too soon to be claiming new physics in \epsilon^\prime/\epsilon or in
D^0-\bar D^0 mixing, but rare K decays offer interesting places to search for
new physics. It is probably also premature to see a clash between global CKM
fits and current estimates of sin \beta and \gamma, where much more precise
data will soon be available. There are interesting possibilities to look for CP
violation in neutrino oscillations and in Higgs physics. Rapid progress can be
expected now that CP violation is moving to the top of the particle physics
agenda.
| [
{
"created": "Thu, 30 Nov 2000 20:45:50 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Ellis",
"John",
"",
"CERN"
]
] | Various developing topics in CP violation are reviewed. There are many theoretical reasons to hope that the CKM paradigm may be incomplete. It is surely too soon to be claiming new physics in \epsilon^\prime/\epsilon or in D^0-\bar D^0 mixing, but rare K decays offer interesting places to search for new physics. It is probably also premature to see a clash between global CKM fits and current estimates of sin \beta and \gamma, where much more precise data will soon be available. There are interesting possibilities to look for CP violation in neutrino oscillations and in Higgs physics. Rapid progress can be expected now that CP violation is moving to the top of the particle physics agenda. |
2110.03694 | Tyler Corbett | T. Corbett, T. Rasmussen | Higgs decays to two leptons and a photon beyond leading order in the
SMEFT | 22 pages excl Appendices, 4 Tables, 7 Figures | SciPost Phys. 13, 112 (2022) | 10.21468/SciPostPhys.13.5.112 | null | hep-ph | http://creativecommons.org/licenses/by/4.0/ | We present the three-body decay of the Higgs boson into two leptons and a
photon to dimension-eight in the Standard Model Effective Field Theory (SMEFT).
In order to obtain this result we interfere the full one-loop Standard Model
result with the tree-level result in the SMEFT. This is the first calculation
of the partial width of the Higgs boson into two leptons and a photon in the
SMEFT to incorporate the full one-loop dependence for the Standard Model as
well as the full tree level dimension-eight dependence in the SMEFT. We find
that this channel can aid in distinguishing strongly interacting and weakly
interacting UV completions of the SMEFT under standard assumptions. We also
find that this channel presents the opportunity to distinguish different
operator Classes within the SMEFT, potentially including contact
$H\bar\ell\ell\gamma$ operators which are first generated only at
dimension-eight in the SMEFT.
| [
{
"created": "Thu, 7 Oct 2021 18:00:00 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Dec 2021 11:40:52 GMT",
"version": "v2"
},
{
"created": "Sun, 1 May 2022 13:26:06 GMT",
"version": "v3"
}
] | 2022-11-23 | [
[
"Corbett",
"T.",
""
],
[
"Rasmussen",
"T.",
""
]
] | We present the three-body decay of the Higgs boson into two leptons and a photon to dimension-eight in the Standard Model Effective Field Theory (SMEFT). In order to obtain this result we interfere the full one-loop Standard Model result with the tree-level result in the SMEFT. This is the first calculation of the partial width of the Higgs boson into two leptons and a photon in the SMEFT to incorporate the full one-loop dependence for the Standard Model as well as the full tree level dimension-eight dependence in the SMEFT. We find that this channel can aid in distinguishing strongly interacting and weakly interacting UV completions of the SMEFT under standard assumptions. We also find that this channel presents the opportunity to distinguish different operator Classes within the SMEFT, potentially including contact $H\bar\ell\ell\gamma$ operators which are first generated only at dimension-eight in the SMEFT. |
hep-ph/9511319 | J. Gunion | J. Dai (U.C. San Diego), J.F. Gunion (U.C. Davis) and R. Vega (SMU) | Detection of the Minimal Supersymmetric Model Higgs Boson $H^0$ in its
$h^0h^0\to 4b$ and $A^0A^0\to 4b$ Decay Channels | 12 pages, full uuencoded postscript file has been submitted, full
postscript file also available via anonymous ftp at
ftp://ucdhep.ucdavis.edu/gunion/hlhl.ps | Phys.Lett. B371 (1996) 71-77 | 10.1016/0370-2693(95)01543-4 | UCD-95-25 | hep-ph hep-ex | null | We demonstrate that detection of the heavier minimal supersymmetric model
CP-even Higgs boson $H^0$ will be possible at the LHC via its $H^0\to h^0h^0\to
4b$ and/or $H^0\to A^0A^0\to 4b$ decay channels for significant portions of the
$( m_{A^0},\tan\beta)$ model parameter space. At low $ m_{A^0}$ ($\lsim
60\gev$), {\it both} the $H^0\to A^0A^0\to 4b$ and $H^0\to h^0h^0\to 4b$ modes
yield a viable signal for most $\tan\beta$ values; viability for the $h^0h^0$
channel extends up to $\mhh\sim 2\mt$ when the model parameter $\tan\beta$ is
not large. At the Tevatron, the $h^0h^0$ and $A^0A^0$ channels are both
potentially viable at low $ m_{A^0}$ for sufficiently good $b$-tagging
efficiency and purity.
| [
{
"created": "Wed, 15 Nov 1995 06:14:40 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Dai",
"J.",
"",
"U.C. San Diego"
],
[
"Gunion",
"J. F.",
"",
"U.C. Davis"
],
[
"Vega",
"R.",
"",
"SMU"
]
] | We demonstrate that detection of the heavier minimal supersymmetric model CP-even Higgs boson $H^0$ will be possible at the LHC via its $H^0\to h^0h^0\to 4b$ and/or $H^0\to A^0A^0\to 4b$ decay channels for significant portions of the $( m_{A^0},\tan\beta)$ model parameter space. At low $ m_{A^0}$ ($\lsim 60\gev$), {\it both} the $H^0\to A^0A^0\to 4b$ and $H^0\to h^0h^0\to 4b$ modes yield a viable signal for most $\tan\beta$ values; viability for the $h^0h^0$ channel extends up to $\mhh\sim 2\mt$ when the model parameter $\tan\beta$ is not large. At the Tevatron, the $h^0h^0$ and $A^0A^0$ channels are both potentially viable at low $ m_{A^0}$ for sufficiently good $b$-tagging efficiency and purity. |
1804.08344 | Ilidio Lopes | Il\'idio Lopes | The spectroscopy of solar sterile neutrinos | 11 pages, 11 figures and 1 table. Open access article | Eur. Phys. J. C, 78 4 (2018) 327. Published online: 21 April 2018 | 10.1140/epjc/s10052-018-5770-8 | null | hep-ph astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We predict the sterile neutrino spectrum of some of the key solar nuclear
reactions and discuss the possibility of these being observed by the next
generation of solar neutrino experiments. By using an up-to-date standard solar
model with good agreement with current helioseismology and solar neutrino flux
data sets, we found that from solar neutrino fluxes arriving on Earth only
3\%-4\% correspond to the sterile neutrino. The most intense solar sources of
sterile neutrinos are the $pp$ and $^7Be$ nuclear reactions with a total flux
of $2.2\times 10^{9}\;{\rm cm^2 s^{-1}}$ and $1.8\times 10^{8}\;{\rm cm^2
s^{-1}}$, followed by the $^{13}N$ and $^{15}O$ nuclear reactions with a total
flux of $1.9\times 10^{7}\;{\rm cm^2 s^{-1}}$ and $1.7\times 10^{7}\;{\rm cm^2
s^{-1}}$. Moreover, we compute the sterile neutrino spectra of the nuclear
proton-proton nuclear reactions -- $pp$, $hep$ and $^8B$ and the
carbon-nitrogen-oxygen -- $^{13}N$, $^{15}O$ and $^{17}F$ and the spectral
lines of $^7Be$.
| [
{
"created": "Mon, 23 Apr 2018 11:28:34 GMT",
"version": "v1"
}
] | 2018-04-24 | [
[
"Lopes",
"Ilídio",
""
]
] | We predict the sterile neutrino spectrum of some of the key solar nuclear reactions and discuss the possibility of these being observed by the next generation of solar neutrino experiments. By using an up-to-date standard solar model with good agreement with current helioseismology and solar neutrino flux data sets, we found that from solar neutrino fluxes arriving on Earth only 3\%-4\% correspond to the sterile neutrino. The most intense solar sources of sterile neutrinos are the $pp$ and $^7Be$ nuclear reactions with a total flux of $2.2\times 10^{9}\;{\rm cm^2 s^{-1}}$ and $1.8\times 10^{8}\;{\rm cm^2 s^{-1}}$, followed by the $^{13}N$ and $^{15}O$ nuclear reactions with a total flux of $1.9\times 10^{7}\;{\rm cm^2 s^{-1}}$ and $1.7\times 10^{7}\;{\rm cm^2 s^{-1}}$. Moreover, we compute the sterile neutrino spectra of the nuclear proton-proton nuclear reactions -- $pp$, $hep$ and $^8B$ and the carbon-nitrogen-oxygen -- $^{13}N$, $^{15}O$ and $^{17}F$ and the spectral lines of $^7Be$. |
1305.6898 | Jon Chkareuli | J.L. Chkareuli | Gauge Fields as Goldstone Bosons Triggered by Spontaneously Broken
Supersymmetry | 55 pages, published version: Phys. Rev. D 90, 065015 (2014) | null | 10.1103/PhysRevD.90.065015 | null | hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The emergent gauge theories are reconsidered in light of supersymmetry and an
appropriate emergence conjecture is formulated. Accordingly, it might be
expected that only global symmetries are fundamental symmetries of Nature,
whereas local symmetries and associated massless gauge fields could solely
emerge due to spontaneous breaking of underlying spacetime symmetries involved,
such as relativistic invariance and supersymmetry. We further argue that this
breaking, taken in the form of the nonlinear sigma-model type pattern for
vector fields or superfields, puts essential restrictions on geometrical
degrees of freedom of a physical field system that makes it to adjust itself in
such a way that its global internal symmetry G turns into the local symmetry
G_{loc}. Remarkably, this emergence process may naturally be triggered by
supersymmetry, as is illustrated in detail by an example of a general
supersymmetric QED model which is then extended to the Standard Model and GUTs.
The requirement of vacuum stability in such class of models makes both Lorentz
invariance and supersymmetry to become spontaneously broken in the visible
sector. As a consequence, massless photon and other gauge bosons appear as the
corresponding Goldstone and pseudo-Goldstone zero modes and special local
invariance is simultaneously generated. Due to this invariance all possible
Lorentz violations are turned out to be completely cancelled out among
themselves. However, broken supersymmetry effects related to an existence of a
light pseudo-goldstino (being essentially a photino) are still left in the
theory. It typically appears in the low-energy particle spectrum as the eV
scale stable LSP or the electroweak scale long-lived NLSP, being in both cases
accompanied by a very light gravitino, that could be considered as some
observational signature in favor of emergent supersymmetric theories.
| [
{
"created": "Wed, 29 May 2013 18:31:06 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jul 2013 15:11:05 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Jun 2014 13:30:37 GMT",
"version": "v3"
},
{
"created": "Thu, 25 Sep 2014 12:56:35 GMT",
"version": "v4"
}
] | 2015-06-16 | [
[
"Chkareuli",
"J. L.",
""
]
] | The emergent gauge theories are reconsidered in light of supersymmetry and an appropriate emergence conjecture is formulated. Accordingly, it might be expected that only global symmetries are fundamental symmetries of Nature, whereas local symmetries and associated massless gauge fields could solely emerge due to spontaneous breaking of underlying spacetime symmetries involved, such as relativistic invariance and supersymmetry. We further argue that this breaking, taken in the form of the nonlinear sigma-model type pattern for vector fields or superfields, puts essential restrictions on geometrical degrees of freedom of a physical field system that makes it to adjust itself in such a way that its global internal symmetry G turns into the local symmetry G_{loc}. Remarkably, this emergence process may naturally be triggered by supersymmetry, as is illustrated in detail by an example of a general supersymmetric QED model which is then extended to the Standard Model and GUTs. The requirement of vacuum stability in such class of models makes both Lorentz invariance and supersymmetry to become spontaneously broken in the visible sector. As a consequence, massless photon and other gauge bosons appear as the corresponding Goldstone and pseudo-Goldstone zero modes and special local invariance is simultaneously generated. Due to this invariance all possible Lorentz violations are turned out to be completely cancelled out among themselves. However, broken supersymmetry effects related to an existence of a light pseudo-goldstino (being essentially a photino) are still left in the theory. It typically appears in the low-energy particle spectrum as the eV scale stable LSP or the electroweak scale long-lived NLSP, being in both cases accompanied by a very light gravitino, that could be considered as some observational signature in favor of emergent supersymmetric theories. |
0707.3300 | Soren Wiesenfeldt | Soren Wiesenfeldt and Scott Willenbrock | Perturbative SO(10) GUT and the Minimal Higgs Sector | v2: discussion about gauge coupling unification extended; figure
added; to appear in Phys. Lett. B | Phys.Lett.B661:268-272,2008 | 10.1016/j.physletb.2008.02.022 | null | hep-ph | null | The breaking of SO(10) to SU(3)_C x U(1)_EM can be accomplished by just four
Higgs fields: the symmetric rank-two tensor, S(54); a pair of spinors, C(16)
and Cbar(16bar); and a vector, T(10). This setup is also able to generate
realistic fermion masses. The heavy color triplets in the vector and spinor
fields mediate proton decay via dimension-five operators. The experimental
bounds on proton decay constrain the structure and size of the Yukawa
operators.
| [
{
"created": "Mon, 23 Jul 2007 01:34:46 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Feb 2008 17:17:21 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Wiesenfeldt",
"Soren",
""
],
[
"Willenbrock",
"Scott",
""
]
] | The breaking of SO(10) to SU(3)_C x U(1)_EM can be accomplished by just four Higgs fields: the symmetric rank-two tensor, S(54); a pair of spinors, C(16) and Cbar(16bar); and a vector, T(10). This setup is also able to generate realistic fermion masses. The heavy color triplets in the vector and spinor fields mediate proton decay via dimension-five operators. The experimental bounds on proton decay constrain the structure and size of the Yukawa operators. |
hep-ph/9708422 | Andrei Shuvaev | A.Shuvaev (St.Petersburg Nuclear Physics Institute) | Multiple soft pion production within nonlinear chiral sigma model | 17 pages, LaTeX, no figures | Z.Phys. A359 (1997) 445-452 | 10.1007/s002180050425 | null | hep-ph | null | Multiple soft pion production in the baryon scattering reactions is
considered in the framework of chiral nonlinear sigma model neglecting the pion
mass. Treating baryons in the eikonal approximation as classical sources, a set
of analytical solutions for the pion field is found. A tree S-matrix is
constructed on the basis of these solutions describing the emission (or
absorption) of any number of soft pions. Then the contribution of soft virtual
pions is taken into account in a closed form. It is shown that the loop
corrections strongly suppress the pion radiation, and for the two limiting
cases of nonrelativistic and ultra-relativistic baryon scatterings there is no
pion emission from the "ends". Thus, the mechanism similar to the soft photon
bremsstrahlung in the quantum electrodynamics seems to be unable to create a
state with a large number of the soft pions.
| [
{
"created": "Thu, 21 Aug 1997 09:10:49 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Shuvaev",
"A.",
"",
"St.Petersburg Nuclear Physics Institute"
]
] | Multiple soft pion production in the baryon scattering reactions is considered in the framework of chiral nonlinear sigma model neglecting the pion mass. Treating baryons in the eikonal approximation as classical sources, a set of analytical solutions for the pion field is found. A tree S-matrix is constructed on the basis of these solutions describing the emission (or absorption) of any number of soft pions. Then the contribution of soft virtual pions is taken into account in a closed form. It is shown that the loop corrections strongly suppress the pion radiation, and for the two limiting cases of nonrelativistic and ultra-relativistic baryon scatterings there is no pion emission from the "ends". Thus, the mechanism similar to the soft photon bremsstrahlung in the quantum electrodynamics seems to be unable to create a state with a large number of the soft pions. |
1211.1947 | Miguel G. Echevarria | Miguel G. Echevarria, Ahmad Idilbi, Ignazio Scimemi | Soft and Collinear Factorization and Transverse Momentum Dependent
Parton Distribution Functions | 9 pages, 3 figures. We modified the discussion about the equivalence
between Collins (JCC) and Echevarria-Idilbi-Scimemi (EIS) definitions of
TMDPDF. The results remain intact. Version to appear in Phys. Lett. B | null | 10.1016/j.physletb.2013.09.003 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we consider how a parton distribution function, with an explicit
transverse momentum dependence can be properly defined in a
regularization-scheme independent manner. We argue that by considering a
factorized form of the transverse momentum dependent spectrum for the
production of a heavy lepton pair in Drell-Yan reaction, one should first split
the relevant soft function into two boost invariant contributions. When those
soft contributions are added to the pure collinear contributions, well-defined
hadronic matrix elements emerge, i.e., the transverse momentum dependent
distributions. We also perform a comparison with Collins' definition.
| [
{
"created": "Thu, 8 Nov 2012 19:06:47 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Mar 2013 19:16:00 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Sep 2013 21:56:49 GMT",
"version": "v3"
}
] | 2015-06-12 | [
[
"Echevarria",
"Miguel G.",
""
],
[
"Idilbi",
"Ahmad",
""
],
[
"Scimemi",
"Ignazio",
""
]
] | In this work we consider how a parton distribution function, with an explicit transverse momentum dependence can be properly defined in a regularization-scheme independent manner. We argue that by considering a factorized form of the transverse momentum dependent spectrum for the production of a heavy lepton pair in Drell-Yan reaction, one should first split the relevant soft function into two boost invariant contributions. When those soft contributions are added to the pure collinear contributions, well-defined hadronic matrix elements emerge, i.e., the transverse momentum dependent distributions. We also perform a comparison with Collins' definition. |
2406.00675 | Gennady Kozlov | G.A. Kozlov | Intuitive study to the scalar boson stars formation | 17 pages | null | null | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the feebly interacting dark matter with the Standard Model fields,
where the preceding and the latter ones are the constituents of the bosonic
cosmological objects, the scalar boson stars (BS). The scalar dark matter (SDM)
massive fields can form the macroscopic scalar bound state when minimally
coupled to gravity (GR). The star may have approximately a stationary form with
an asymptotically flat geometry, and the maximal mass of the BS is larger than
the solar mass. We consider an effective description of a more complete model
with the (thermo)dynamic potential of the BS at finite temperature. The
formation of the BS may also be explained in terms of the electric fluxes of
the hidden vector field under the influence of the SDM field as the
cosmological dynamical quantity minimally coupled to GR. The SDM fields may
fluctuate with the temperature and is established around the equilibrium state
at some weak background scale.
| [
{
"created": "Sun, 2 Jun 2024 09:04:57 GMT",
"version": "v1"
}
] | 2024-06-04 | [
[
"Kozlov",
"G. A.",
""
]
] | We study the feebly interacting dark matter with the Standard Model fields, where the preceding and the latter ones are the constituents of the bosonic cosmological objects, the scalar boson stars (BS). The scalar dark matter (SDM) massive fields can form the macroscopic scalar bound state when minimally coupled to gravity (GR). The star may have approximately a stationary form with an asymptotically flat geometry, and the maximal mass of the BS is larger than the solar mass. We consider an effective description of a more complete model with the (thermo)dynamic potential of the BS at finite temperature. The formation of the BS may also be explained in terms of the electric fluxes of the hidden vector field under the influence of the SDM field as the cosmological dynamical quantity minimally coupled to GR. The SDM fields may fluctuate with the temperature and is established around the equilibrium state at some weak background scale. |
hep-ph/9909397 | Jaume Guasch | J. A. Coarasa, Jaume Guasch, Joan Sola | Top quark and charged Higgs at the Tevatron-Run II | LaTeX, 7 pages, 3 figures included using epsfig, uses amssymb.sty.
Updated talk presented in: Physics at Run II Workshop on Supersymmetry/Higgs,
Fermilab, to appear in the proceedings | null | null | UAB-FT-471, KA-TP-13-1999 | hep-ph | null | We shortly review the top quark decay into charged Higgs, and present new
results on its production at the upgraded Tevatron. We have computed the MSSM
cross-section for single charged Higgs in association with the top quark beyond
the regime of on-shell t t-bar production followed by the decay t -> H+ b. Our
results are higher than recent results in the literature. In the case where H+
belongs to the Higgs sector of the MSSM, we show that the leading
supersymmetric radiative corrections may substantially increase the
cross-section. Overall we find that the charged Higgs production process can be
complementary to the neutral Higgs production processes W\Phi and b b-bar\Phi,
which have been studied under similar circumstances. Since the neutral and
charged Higgs channels are enhanced in the same region of the parameter space,
the simultaneous detection of all these processes could be essential for an
effective experimental underpinning of the nature of these Higgs particles at
the Tevatron-Run II.
| [
{
"created": "Thu, 16 Sep 1999 11:21:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Coarasa",
"J. A.",
""
],
[
"Guasch",
"Jaume",
""
],
[
"Sola",
"Joan",
""
]
] | We shortly review the top quark decay into charged Higgs, and present new results on its production at the upgraded Tevatron. We have computed the MSSM cross-section for single charged Higgs in association with the top quark beyond the regime of on-shell t t-bar production followed by the decay t -> H+ b. Our results are higher than recent results in the literature. In the case where H+ belongs to the Higgs sector of the MSSM, we show that the leading supersymmetric radiative corrections may substantially increase the cross-section. Overall we find that the charged Higgs production process can be complementary to the neutral Higgs production processes W\Phi and b b-bar\Phi, which have been studied under similar circumstances. Since the neutral and charged Higgs channels are enhanced in the same region of the parameter space, the simultaneous detection of all these processes could be essential for an effective experimental underpinning of the nature of these Higgs particles at the Tevatron-Run II. |
2212.14401 | Aleksandra Lelek | Aleksandra Lelek | A parton branching algorithm with transverse momentum dependent
splitting functions | Presented at "Diffraction and Low-$x$ 2022'', Corigliano Calabro
(Italy), September 24-30, 2022, Submission to Acta Physica Polonica B | null | null | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Parton branching methods underlie the Monte Carlo (MC) generators, being
therefore of key importance for obtaining high energy physics predictions. We
construct a new parton branching algorithm which for the first time
incorporates the off-shell, transverse-momentum dependent (TMD) splitting
functions, defined from the high-energy limit of partonic decay amplitudes.
Based on these TMD splitting functions we construct a new TMD Sudakov form
factor. We present the first MC implementation of the algorithm for the
evolution of the TMD and integrated parton distribution functions (PDFs). We
use this implementation to evaluate small-$x$ corrections to the distributions
and to verify the momentum sum rule. The presented study is a first step
towards a full TMD MC generator covering the small-$x$ phase space.
| [
{
"created": "Thu, 29 Dec 2022 18:15:37 GMT",
"version": "v1"
}
] | 2023-01-02 | [
[
"Lelek",
"Aleksandra",
""
]
] | Parton branching methods underlie the Monte Carlo (MC) generators, being therefore of key importance for obtaining high energy physics predictions. We construct a new parton branching algorithm which for the first time incorporates the off-shell, transverse-momentum dependent (TMD) splitting functions, defined from the high-energy limit of partonic decay amplitudes. Based on these TMD splitting functions we construct a new TMD Sudakov form factor. We present the first MC implementation of the algorithm for the evolution of the TMD and integrated parton distribution functions (PDFs). We use this implementation to evaluate small-$x$ corrections to the distributions and to verify the momentum sum rule. The presented study is a first step towards a full TMD MC generator covering the small-$x$ phase space. |
2406.01691 | Tom\'as O'Shea | Tom\'as O'Shea, Anne-Christine Davis, Maurizio Giannotti, Sunny
Vagnozzi, Luca Visinelli, Julia K. Vogel | Solar chameleons: novel channels (I) | 17 pages, 6 figures | null | null | null | hep-ph astro-ph.HE astro-ph.SR gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the flux of chameleons (light scalar particles which could play a
role in the dark energy phenomenon) produced in the interior of the Sun. Our
novel analysis incorporates various important details and new processes that
have previously been overlooked, including the impact of the bulk magnetic
field profile, as well as Primakoff production of chameleons in the electric
fields of electrons and ions. In this paper we consider only the contributions
of transverse photons. The production of chameleons from longitudinal
electromagnetic excitations will be presented in a dedicated follow-up work.
Demanding that the total flux of chameleons does not exceed 3% of the solar
luminosity leads to the stringent upper limit on the chameleon-photon conformal
coupling $\beta_\gamma \lesssim 10^{10}$, assuming that the height of the
chameleon potential is set to the dark energy scale $\Lambda = 2.4$ meV, and
independently of other couplings to matter. Although this bound is tighter than
current upper limits on $\beta_{\gamma}$ from the CAST helioscope, these limits
will have to be reassessed in terms of the updated solar chameleon flux we have
computed. We argue that solar chameleons, potentially detectable in
next-generation helioscopes such as IAXO, can be used to probe a region of
chameleon parameter space that has yet to be covered.
| [
{
"created": "Mon, 3 Jun 2024 18:00:03 GMT",
"version": "v1"
}
] | 2024-06-05 | [
[
"O'Shea",
"Tomás",
""
],
[
"Davis",
"Anne-Christine",
""
],
[
"Giannotti",
"Maurizio",
""
],
[
"Vagnozzi",
"Sunny",
""
],
[
"Visinelli",
"Luca",
""
],
[
"Vogel",
"Julia K.",
""
]
] | We revisit the flux of chameleons (light scalar particles which could play a role in the dark energy phenomenon) produced in the interior of the Sun. Our novel analysis incorporates various important details and new processes that have previously been overlooked, including the impact of the bulk magnetic field profile, as well as Primakoff production of chameleons in the electric fields of electrons and ions. In this paper we consider only the contributions of transverse photons. The production of chameleons from longitudinal electromagnetic excitations will be presented in a dedicated follow-up work. Demanding that the total flux of chameleons does not exceed 3% of the solar luminosity leads to the stringent upper limit on the chameleon-photon conformal coupling $\beta_\gamma \lesssim 10^{10}$, assuming that the height of the chameleon potential is set to the dark energy scale $\Lambda = 2.4$ meV, and independently of other couplings to matter. Although this bound is tighter than current upper limits on $\beta_{\gamma}$ from the CAST helioscope, these limits will have to be reassessed in terms of the updated solar chameleon flux we have computed. We argue that solar chameleons, potentially detectable in next-generation helioscopes such as IAXO, can be used to probe a region of chameleon parameter space that has yet to be covered. |
hep-ph/9311211 | Roberto Ugoccioni | R. Ugoccioni, A. Giovannini and S. Lupia | The Generalized Simplified Parton Shower Model | (uuencoded, gzip-compressed postscript file, 6 pages) DFTT 52/93.
[Talk presented at XXIII Int'l. Symposium on Multiparticle Dynamics, Aspen,
CO, USA, 12-17 September 1993] | null | null | null | hep-ph | null | We explore the consequences of considering clans real physical objects in the
framework of a generalized version of the Simplified Parton Shower model for a
single jet. We predict that the average number of clans at fixed energy grows
linearly in rapidity and slowly decreases with energy in a fixed rapidity
interval.
| [
{
"created": "Tue, 2 Nov 1993 16:50:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ugoccioni",
"R.",
""
],
[
"Giovannini",
"A.",
""
],
[
"Lupia",
"S.",
""
]
] | We explore the consequences of considering clans real physical objects in the framework of a generalized version of the Simplified Parton Shower model for a single jet. We predict that the average number of clans at fixed energy grows linearly in rapidity and slowly decreases with energy in a fixed rapidity interval. |
2209.14246 | Maximilian Berbig | Maximilian Berbig | The Type II Dirac Seesaw Portal to the mirror sector: Connecting
neutrino masses and a solution to the strong CP problem | version 1: 8 pages + 2 pages of appendices, comments always welcome!,
version 2: 10 pages + 6 pages of appendices, details and clarifications
added, layout optimized, matches published version | Phys. Rev. D 106, 115018 (2022) | 10.1103/PhysRevD.106.115018 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a version of the Type II Seesaw mechanism for parametrically small
Dirac neutrino masses. Our model starts from an $\text{SU}(2)_\text{L} \otimes
\text{SU}(2)'\otimes \text{U}(1)_\text{X}$ gauge extension of the Standard
Model involving a sector of mirror fermions. A bidoublet scalar with a very
small vacuum expectation value connects the SM leptons with their mirror
counterparts and we can identify the mirror neutrino with the right-handed
neutrino. Similar to the conventional Type II Seesaw, our particle spectrum
features singly- and doubly-charged scalars. The strong CP problem is solved by
a discrete exchange symmetry between the two sectors that forces the
contributions of quarks and mirror quarks to the strong CP phase to cancel each
other. We discuss the low-energy phenomenology, comment on the cosmological
implications of this scenario and indicate how to realize successful Dirac
leptogenesis.
| [
{
"created": "Wed, 28 Sep 2022 17:06:15 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Dec 2022 16:07:44 GMT",
"version": "v2"
}
] | 2022-12-20 | [
[
"Berbig",
"Maximilian",
""
]
] | We present a version of the Type II Seesaw mechanism for parametrically small Dirac neutrino masses. Our model starts from an $\text{SU}(2)_\text{L} \otimes \text{SU}(2)'\otimes \text{U}(1)_\text{X}$ gauge extension of the Standard Model involving a sector of mirror fermions. A bidoublet scalar with a very small vacuum expectation value connects the SM leptons with their mirror counterparts and we can identify the mirror neutrino with the right-handed neutrino. Similar to the conventional Type II Seesaw, our particle spectrum features singly- and doubly-charged scalars. The strong CP problem is solved by a discrete exchange symmetry between the two sectors that forces the contributions of quarks and mirror quarks to the strong CP phase to cancel each other. We discuss the low-energy phenomenology, comment on the cosmological implications of this scenario and indicate how to realize successful Dirac leptogenesis. |
1106.1204 | Krzysztof M. Graczyk | Krzysztof M. Graczyk | Two-Photon Exchange Effect Studied with Neural Networks | 9 pages, 4 figures, the manuscript is divided into 4 sections, 5
appendixes are added, the text is enriched by the more detailed description
of the Bayesian formalism, one new figure is also added | null | 10.1103/PhysRevC.84.034314 | null | hep-ph nucl-ex nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An approach to the extraction of the two-photon exchange (TPE) correction
from elastic $ep$ scattering data is presented. The cross section, polarization
transfer (PT), and charge asymmetry data are considered. It is assumed that the
TPE correction to the PT data is negligible. The form factors and TPE
correcting term are given by one multidimensional function approximated by the
feed forward neural network (NN). To find a model-independent approximation the
Bayesian framework for the NNs is adapted. A large number of different
parametrizations is considered. The most optimal model is indicated by the
Bayesian algorithm. The obtained fit of the TPE correction behaves linearly in
epsilon but it has a nontrivial Q2 dependence. A strong dependence of the TPE
fit on the choice of parametrization is observed.
| [
{
"created": "Mon, 6 Jun 2011 21:54:57 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Aug 2011 18:20:33 GMT",
"version": "v2"
}
] | 2015-05-28 | [
[
"Graczyk",
"Krzysztof M.",
""
]
] | An approach to the extraction of the two-photon exchange (TPE) correction from elastic $ep$ scattering data is presented. The cross section, polarization transfer (PT), and charge asymmetry data are considered. It is assumed that the TPE correction to the PT data is negligible. The form factors and TPE correcting term are given by one multidimensional function approximated by the feed forward neural network (NN). To find a model-independent approximation the Bayesian framework for the NNs is adapted. A large number of different parametrizations is considered. The most optimal model is indicated by the Bayesian algorithm. The obtained fit of the TPE correction behaves linearly in epsilon but it has a nontrivial Q2 dependence. A strong dependence of the TPE fit on the choice of parametrization is observed. |
1805.01353 | Christian Reuschle | Diogenes Figueroa, Steven Honeywell, Seth Quackenbush, Laura Reina,
Christian Reuschle, Doreen Wackeroth | Electroweak and QCD corrections to $Z$-boson production with one $b$ jet
in a massive 5 Flavor Scheme | 32 pages, 7 figures, 2 tables. V3: Version to appear in PRD | Phys. Rev. D 98, 093002 (2018) | 10.1103/PhysRevD.98.093002 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the $O(\alpha_s \alpha^2)$ and $O(\alpha_s^2 \alpha)$
contributions to the production cross section of a $Z$ boson with one $b$ jet
at the Large Hadron Collider (LHC), and study their phenomenological relevance
for LHC physics. The accurate prediction of hadronic $Z+b$-jet production is
needed to control a background that greatly affects both the measurement of
Higgs-boson properties and searches of new physics at the LHC. At the same time
it could enable the first precise measurement of the $b$-quark parton
distribution function. In this context $b$-quark mass effects become relevant
and need to be studied with care, both at the level of the hard process and at
the level of the initial- and final-state parton evolution. It is the aim of
this paper to explore some of these issues in the framework of a massive 5
Flavor Scheme and to assess the need for both the inclusion of electroweak
corrections, in addition to QCD corrections, and $b$-quark mass effects in the
prediction of total and differential cross sections for hadronic $Z+b$-jet
production.
| [
{
"created": "Thu, 3 May 2018 15:05:12 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Jun 2018 18:45:17 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Jan 2019 14:26:09 GMT",
"version": "v3"
}
] | 2019-01-10 | [
[
"Figueroa",
"Diogenes",
""
],
[
"Honeywell",
"Steven",
""
],
[
"Quackenbush",
"Seth",
""
],
[
"Reina",
"Laura",
""
],
[
"Reuschle",
"Christian",
""
],
[
"Wackeroth",
"Doreen",
""
]
] | We compute the $O(\alpha_s \alpha^2)$ and $O(\alpha_s^2 \alpha)$ contributions to the production cross section of a $Z$ boson with one $b$ jet at the Large Hadron Collider (LHC), and study their phenomenological relevance for LHC physics. The accurate prediction of hadronic $Z+b$-jet production is needed to control a background that greatly affects both the measurement of Higgs-boson properties and searches of new physics at the LHC. At the same time it could enable the first precise measurement of the $b$-quark parton distribution function. In this context $b$-quark mass effects become relevant and need to be studied with care, both at the level of the hard process and at the level of the initial- and final-state parton evolution. It is the aim of this paper to explore some of these issues in the framework of a massive 5 Flavor Scheme and to assess the need for both the inclusion of electroweak corrections, in addition to QCD corrections, and $b$-quark mass effects in the prediction of total and differential cross sections for hadronic $Z+b$-jet production. |
hep-ph/9508316 | Mihir Worah | Mihir P. Worah (EFI and U Chicago) | Cosmological Baryon Asymmetry and Kaon CP Violation from a Common Source | 26 pages, Latex. 6 figures submitted as uuencoded file, uses
epsfig.sty | Phys.Rev. D53 (1996) 3902-3912 | 10.1103/PhysRevD.53.3902 | EFI 95-43 | hep-ph | null | We extend an earlier model for radiatively generated fermion masses based on
the Pati-Salam group to include CP violation. Spontaneous CP violation in the
early universe gives rise to a complex mass matrix for heavy sterile neutrinos.
The out-of-equilibrium decay of these neutrinos generates a $B-L$ asymmetry.
The sterile neutrinos also act as a mass seed in generating one-loop (complex)
mass matrices for the quarks. Thus, the two low energy manifestations of CP
violation -- the CKM phase and the baryon number asymmetry -- can both be
traced in a calculable way to a common source.
| [
{
"created": "Wed, 16 Aug 1995 22:06:16 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Worah",
"Mihir P.",
"",
"EFI and U Chicago"
]
] | We extend an earlier model for radiatively generated fermion masses based on the Pati-Salam group to include CP violation. Spontaneous CP violation in the early universe gives rise to a complex mass matrix for heavy sterile neutrinos. The out-of-equilibrium decay of these neutrinos generates a $B-L$ asymmetry. The sterile neutrinos also act as a mass seed in generating one-loop (complex) mass matrices for the quarks. Thus, the two low energy manifestations of CP violation -- the CKM phase and the baryon number asymmetry -- can both be traced in a calculable way to a common source. |
2307.09873 | Miguel Albaladejo | M. Albaladejo, A. Feijoo, I. Vida\~na, J. Nieves, E. Oset | Inverse problem in femtoscopic correlation functions: The
$T_{cc}(3875)^+$ state | null | null | null | null | hep-ph hep-ex nucl-ex nucl-th | http://creativecommons.org/licenses/by/4.0/ | We study here the inverse problem of starting from the femtoscopic
correlation functions of related channels and analyze them with an efficient
tool to extract the maximum information possible on the interaction of the
components of these channels, and the existence of possible bound states tied
to this interaction. The method is flexible enough to accommodate non-molecular
components and the effect of missing channels relevant for the interaction. We
apply the method to realistic correlation functions for the $D^{*+}D^0$ and
$D^{*0}D^+$ channels derived consistently from the properties of the
$T_{cc}(3875)^+$ and find that we can extract the existence of a bound state,
its nature as a molecular state of the $D^{*+}D^0$ and $D^{*0}D^+$ channels,
the probabilities of each channel, as well as scattering lengths and effective
ranges for the channels, together with the size of the source function, all of
them with a relatively good precision.
| [
{
"created": "Wed, 19 Jul 2023 10:04:56 GMT",
"version": "v1"
}
] | 2023-07-20 | [
[
"Albaladejo",
"M.",
""
],
[
"Feijoo",
"A.",
""
],
[
"Vidaña",
"I.",
""
],
[
"Nieves",
"J.",
""
],
[
"Oset",
"E.",
""
]
] | We study here the inverse problem of starting from the femtoscopic correlation functions of related channels and analyze them with an efficient tool to extract the maximum information possible on the interaction of the components of these channels, and the existence of possible bound states tied to this interaction. The method is flexible enough to accommodate non-molecular components and the effect of missing channels relevant for the interaction. We apply the method to realistic correlation functions for the $D^{*+}D^0$ and $D^{*0}D^+$ channels derived consistently from the properties of the $T_{cc}(3875)^+$ and find that we can extract the existence of a bound state, its nature as a molecular state of the $D^{*+}D^0$ and $D^{*0}D^+$ channels, the probabilities of each channel, as well as scattering lengths and effective ranges for the channels, together with the size of the source function, all of them with a relatively good precision. |
hep-ph/9902406 | Carlos Antonio De Sousa Pires | C. A de S. Pires | Remark on the vectorlike nature of the electromagnetism and the electric
charge quantization | 17 pages, latex, no figures | Phys.Rev. D60 (1999) 075013 | 10.1103/PhysRevD.60.075013 | null | hep-ph | null | In this work we study the structure of the electromagnetic interactions and
the electric charge quantization in gauge theories of electroweak interactions
based on semi-simple groups. We show that in the standard model of the
electroweak interactions the structure of the electromagnetic interactions is
strongly correlated to the quantization pattern of the electric charges. We
examine these two questions also in all possible chiral bilepton gauge models
of the electroweak interactions. In all they we can explain the vectorlike
nature of the electromagnetic interactions and the electric charge quantization
together demanding nonvanishing fermion masses and the anomaly cancellations.
| [
{
"created": "Fri, 19 Feb 1999 17:05:47 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Pires",
"C. A de S.",
""
]
] | In this work we study the structure of the electromagnetic interactions and the electric charge quantization in gauge theories of electroweak interactions based on semi-simple groups. We show that in the standard model of the electroweak interactions the structure of the electromagnetic interactions is strongly correlated to the quantization pattern of the electric charges. We examine these two questions also in all possible chiral bilepton gauge models of the electroweak interactions. In all they we can explain the vectorlike nature of the electromagnetic interactions and the electric charge quantization together demanding nonvanishing fermion masses and the anomaly cancellations. |
1409.1669 | Taku Hayakawa | Keisuke Harigaya, Taku Hayakawa, Masahiro Kawasaki, Shuichiro Yokoyama | CDM/baryon isocurvature perturbations in a sneutrino curvaton model | 20 pages, 4 figures | null | 10.1088/1475-7516/2014/10/068 | ICRR-Report-692-2014-18, IPMU-14-0301, RUP-14-14 | hep-ph astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Matter isocurvature perturbations are strictly constrained from cosmic
microwave background observations. We study a sneutrino curvaton model where
both cold dark matter (CDM)/baryon isocurvature perturbations are generated. In
our model, total matter isocurvature perturbations are reduced since the
CDM/baryon isocurvature perturbations compensate for each other. We show that
this model can not only avoid the stringent observational constraints but also
suppress temperature anisotropies on large scales, which leads to improved
agreement with observations.
| [
{
"created": "Fri, 5 Sep 2014 06:44:34 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Harigaya",
"Keisuke",
""
],
[
"Hayakawa",
"Taku",
""
],
[
"Kawasaki",
"Masahiro",
""
],
[
"Yokoyama",
"Shuichiro",
""
]
] | Matter isocurvature perturbations are strictly constrained from cosmic microwave background observations. We study a sneutrino curvaton model where both cold dark matter (CDM)/baryon isocurvature perturbations are generated. In our model, total matter isocurvature perturbations are reduced since the CDM/baryon isocurvature perturbations compensate for each other. We show that this model can not only avoid the stringent observational constraints but also suppress temperature anisotropies on large scales, which leads to improved agreement with observations. |
hep-ph/0110398 | Alexei A. Pivovarov | A.A. Pivovarov | Heavy quark production near the threshold in QCD | Talk given at 10th Lomonosov conference on Elementary Particle
Physics, August 2001, Moscow, Russia, 9 pages, Latex | null | null | MZ-TH/01-29 | hep-ph | null | Theoretical results for the cross section of heavy quark production near the
threshold at NNLO of NRQCD are briefly overviewed.
| [
{
"created": "Wed, 31 Oct 2001 09:37:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pivovarov",
"A. A.",
""
]
] | Theoretical results for the cross section of heavy quark production near the threshold at NNLO of NRQCD are briefly overviewed. |
hep-ph/9610493 | null | Louis J. Clavelli and Levan R. Surguladze | Light Gluino Contribution in Hadronic Decays of Z boson and tau lepton
to O(alpha_s^3) | 7 pages, RevTex, 1 Postscript figure | Phys.Rev.Lett. 78 (1997) 1632-1635 | 10.1103/PhysRevLett.78.1632 | UAHEP967 | hep-ph | null | The results of calculation of light gluino contributions to
Gamma(Z--->hadrons) and Gamma(tau--->hadrons) to O(alpha_s^3) are presented.
The net effect in the case of Z decay is noticeable. For the tau width the
effect is very large and, if a light gluino exists, suggests that alpha_s
increases by more than 15% relative to the Standard Model analysis.
| [
{
"created": "Fri, 25 Oct 1996 21:04:46 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Clavelli",
"Louis J.",
""
],
[
"Surguladze",
"Levan R.",
""
]
] | The results of calculation of light gluino contributions to Gamma(Z--->hadrons) and Gamma(tau--->hadrons) to O(alpha_s^3) are presented. The net effect in the case of Z decay is noticeable. For the tau width the effect is very large and, if a light gluino exists, suggests that alpha_s increases by more than 15% relative to the Standard Model analysis. |
2204.03961 | Sergey Salnikov | A.E. Bondar, A.I. Milstein, R.V. Mizuk, S.G. Salnikov | Effects of isospin violation in the $e^+e^- \rightarrow B^{(*)}\bar
B^{(*)}$ cross sections | 6 pages, 2 figures | J. High Energ. Phys. 2022, 170 (2022) | 10.1007/JHEP05(2022)170 | null | hep-ph hep-ex | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Model estimates are obtained for the influence of Coulomb effects on the
ratio of the cross sections for the production of charged and neutral $B\bar B$
and $B^*\bar B^*$ pairs in $e^+e^-$ annihilation. It is shown that the
difference between the masses of charged and neutral mesons obtained under the
assumption that this ratio is constant on a scale of the order of the beam
energy spread can differ from the true one by $\delta M \sim 0.03\,\mbox{MeV}$
at the energy of $\Upsilon (5S)$ and by $\delta M \sim 0.4\,\mbox{MeV}$ at the
energy of $\Upsilon (4S)$. Thus, the errors given in the PDG for the difference
between the masses of charged and neutral $B$ mesons, based on the results
obtained at the energy of $\Upsilon (4S)$, are strongly underestimated. Similar
measurements at the energy of $\Upsilon (5S)$ will have an order of magnitude
smaller systematic shift for the mass difference. This circumstance should be
taken into account when planning future experiments at the $B$ factory in KEK.
| [
{
"created": "Fri, 8 Apr 2022 09:36:35 GMT",
"version": "v1"
}
] | 2022-10-11 | [
[
"Bondar",
"A. E.",
""
],
[
"Milstein",
"A. I.",
""
],
[
"Mizuk",
"R. V.",
""
],
[
"Salnikov",
"S. G.",
""
]
] | Model estimates are obtained for the influence of Coulomb effects on the ratio of the cross sections for the production of charged and neutral $B\bar B$ and $B^*\bar B^*$ pairs in $e^+e^-$ annihilation. It is shown that the difference between the masses of charged and neutral mesons obtained under the assumption that this ratio is constant on a scale of the order of the beam energy spread can differ from the true one by $\delta M \sim 0.03\,\mbox{MeV}$ at the energy of $\Upsilon (5S)$ and by $\delta M \sim 0.4\,\mbox{MeV}$ at the energy of $\Upsilon (4S)$. Thus, the errors given in the PDG for the difference between the masses of charged and neutral $B$ mesons, based on the results obtained at the energy of $\Upsilon (4S)$, are strongly underestimated. Similar measurements at the energy of $\Upsilon (5S)$ will have an order of magnitude smaller systematic shift for the mass difference. This circumstance should be taken into account when planning future experiments at the $B$ factory in KEK. |
1007.3696 | Yudi Santoso | Bhaskar Dutta, Yukihiro Mimura and Yudi Santoso | CP Violating Lepton Asymmetry from B Decays in Supersymmetric Grand
Unified Theories | 23 pages, 5 figures | Phys.Rev.D82:055017,2010 | 10.1103/PhysRevD.82.055017 | MIFPA-10-31 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the effect of the dimuon CP asymmetry from the B decay modes,
recently observed at 3.2 sigma deviation from the Standard Model (SM) by the D0
collaboration, in the context of SU(5) and SO(10) GUT models. We exhibit that a
large amount of flavor violation between the second and the third generation is
generated due to the large neutrino atmospheric mixing angle and this flavor
violation can be responsible for the observed large CP asymmetry due to the
presence of new phases (not present in the CKM matrix) in the Yukawa couplings.
We also study the implication of the parameter space in these GUT models with
large CP violating lepton asymmetry for different phenomenologies, e.g., Br(tau
-> mu + gamma), Br(B_s -> mu + mu) at the Fermilab, direct detection of dark
matter (DM) in the ongoing detectors and measurement of muon flux from solar
neutrinos at the IceCube experiment.
| [
{
"created": "Wed, 21 Jul 2010 17:06:57 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Dutta",
"Bhaskar",
""
],
[
"Mimura",
"Yukihiro",
""
],
[
"Santoso",
"Yudi",
""
]
] | We investigate the effect of the dimuon CP asymmetry from the B decay modes, recently observed at 3.2 sigma deviation from the Standard Model (SM) by the D0 collaboration, in the context of SU(5) and SO(10) GUT models. We exhibit that a large amount of flavor violation between the second and the third generation is generated due to the large neutrino atmospheric mixing angle and this flavor violation can be responsible for the observed large CP asymmetry due to the presence of new phases (not present in the CKM matrix) in the Yukawa couplings. We also study the implication of the parameter space in these GUT models with large CP violating lepton asymmetry for different phenomenologies, e.g., Br(tau -> mu + gamma), Br(B_s -> mu + mu) at the Fermilab, direct detection of dark matter (DM) in the ongoing detectors and measurement of muon flux from solar neutrinos at the IceCube experiment. |
1509.04068 | Yuta Orikasa | Hiroshi Okada, Yuta Orikasa | Two-loop Neutrino Model with Exotic Leptons | 20 pages, 1 figure, 4 tables | Phys. Rev. D 93, 013008 (2016) | 10.1103/PhysRevD.93.013008 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a two-loop induced neutrino mass model, in which we show some
bench mark points to satisfy the observed neutrino oscillation, the constraints
of lepton flavor violations, and the relic density in the co-annihilation
system satisfying the current upper bound on the spin independent scattering
cross section with nuclei. We also discuss new sources of muon anomalous
magnetic moment.
| [
{
"created": "Mon, 14 Sep 2015 12:53:47 GMT",
"version": "v1"
}
] | 2016-01-20 | [
[
"Okada",
"Hiroshi",
""
],
[
"Orikasa",
"Yuta",
""
]
] | We propose a two-loop induced neutrino mass model, in which we show some bench mark points to satisfy the observed neutrino oscillation, the constraints of lepton flavor violations, and the relic density in the co-annihilation system satisfying the current upper bound on the spin independent scattering cross section with nuclei. We also discuss new sources of muon anomalous magnetic moment. |
hep-ph/9703279 | Peter Morawitz | H. Dreiner, P. Morawitz | High Q2-Anomaly at HERA and Supersymmetry | In our original manuscript we made a mistake in the cross-section
computation. The correction has lead to changes in the allowed solutions.
Also corrected typos in the Appendix. 29 pages, 6 figures | Nucl.Phys. B503 (1997) 55-78 | 10.1016/S0550-3213(97)00401-X | null | hep-ph | null | We discuss the recently observed excess of high Q2 neutral current deep
inelastic scattering events at HERA in the light of supersymmetry with broken
R-parity. We find more than one possible solution. We consider the
possibilities for testing these hypotheses at HERA, the TEVATRON and at LEP.
One lepton-number violating operator can account for both the HERA data and the
four-jet anomaly seen by ALEPH at LEP.
| [
{
"created": "Mon, 10 Mar 1997 01:48:07 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Mar 1997 17:15:05 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Dreiner",
"H.",
""
],
[
"Morawitz",
"P.",
""
]
] | We discuss the recently observed excess of high Q2 neutral current deep inelastic scattering events at HERA in the light of supersymmetry with broken R-parity. We find more than one possible solution. We consider the possibilities for testing these hypotheses at HERA, the TEVATRON and at LEP. One lepton-number violating operator can account for both the HERA data and the four-jet anomaly seen by ALEPH at LEP. |
hep-ph/0501200 | Arkady Vainshtein | M. Shifman and A. Vainshtein | Comments on Diquarks, Strong Binding and a Large Hidden QCD Scale | 18 pages, 3 figures; journal version, minor changes | Phys.Rev. D71 (2005) 074010 | 10.1103/PhysRevD.71.074010 | FTPI-MINN-05/02, UMN-TH-2343/05, NSF-KITP-05-03 | hep-ph | null | We present arguments regarding diquarks possible role in low-energy hadron
phenomenology that escaped theorists' attention so far. Good diquarks, i.e. the
$0^{+}$ states of two quarks, are argued to have a two-component structure with
one of the components peaking at distances several times shorter than a typical
hadron size (a short-range core). This can play a role in solving two old
puzzles of the 't Hooft 1/N expansion: strong quark mass dependence of the
vacuum energy density and strong violations of the Okubo-Zweig-Iizuka (OZI)
rule in the quark-antiquark $0^\pm$ channels. In both cases empiric data defy
't Hooft's 1/N suppression. If good diquarks play a role at an intermediate
energy scale they ruin 't Hoofts planarity because of their mixed-flavor
composition. This new scale associated with the good diquarks may be related to
a numerically large scale discovered in [V. Novikov, M. Shifman, A. Vainshtein
and V. Zakharov, Nucl. Phys. B 191, 301 (1981)] in a number of phenomena mostly
related to vacuum quantum numbers and $0^\pm$ glueball channels. If SU(3)$_{\rm
color}$ of bona fide QCD is replaced by SU(2)$_{\rm color}$, diquarks become
well-defined gauge invariant objects. Moreover, there is an exact symmetry
relating them to pions. In this limit predictions regarding good diquarks are
iron-clad. If passage from SU(2)$_{\rm color}$ to SU(3)$_{\rm color}$ does not
lead to dramatic disturbances, these predictions remain qualitatively valid in
bona fide QCD.
| [
{
"created": "Fri, 21 Jan 2005 02:41:46 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Jan 2005 00:22:30 GMT",
"version": "v2"
},
{
"created": "Fri, 18 Feb 2005 02:52:11 GMT",
"version": "v3"
},
{
"created": "Tue, 3 May 2005 21:51:28 GMT",
"version": "v4"
}
] | 2009-11-11 | [
[
"Shifman",
"M.",
""
],
[
"Vainshtein",
"A.",
""
]
] | We present arguments regarding diquarks possible role in low-energy hadron phenomenology that escaped theorists' attention so far. Good diquarks, i.e. the $0^{+}$ states of two quarks, are argued to have a two-component structure with one of the components peaking at distances several times shorter than a typical hadron size (a short-range core). This can play a role in solving two old puzzles of the 't Hooft 1/N expansion: strong quark mass dependence of the vacuum energy density and strong violations of the Okubo-Zweig-Iizuka (OZI) rule in the quark-antiquark $0^\pm$ channels. In both cases empiric data defy 't Hooft's 1/N suppression. If good diquarks play a role at an intermediate energy scale they ruin 't Hoofts planarity because of their mixed-flavor composition. This new scale associated with the good diquarks may be related to a numerically large scale discovered in [V. Novikov, M. Shifman, A. Vainshtein and V. Zakharov, Nucl. Phys. B 191, 301 (1981)] in a number of phenomena mostly related to vacuum quantum numbers and $0^\pm$ glueball channels. If SU(3)$_{\rm color}$ of bona fide QCD is replaced by SU(2)$_{\rm color}$, diquarks become well-defined gauge invariant objects. Moreover, there is an exact symmetry relating them to pions. In this limit predictions regarding good diquarks are iron-clad. If passage from SU(2)$_{\rm color}$ to SU(3)$_{\rm color}$ does not lead to dramatic disturbances, these predictions remain qualitatively valid in bona fide QCD. |
hep-ph/0509319 | Masayasu Harada | Masayasu Harada | Vector Manifestation and the Hidden Local Symmetry | Contribution to the proceedings of ``International Conference on QCD
and Hadronic Physics'' (June 16-20, 2005, Beijing, China) | Int.J.Mod.Phys. A21 (2006) 946-949 | 10.1142/S0217751X06032381 | DPNU-05-17 | hep-ph nucl-th | null | In this write-up, I summarize the key ingredients of the vector manifestaion
formulated in the hidden local symmetry theory, in which the $\rho$ meson
becomes massless degenerated with the pion at the chiral phase transition
point.
| [
{
"created": "Wed, 28 Sep 2005 09:35:35 GMT",
"version": "v1"
}
] | 2016-09-06 | [
[
"Harada",
"Masayasu",
""
]
] | In this write-up, I summarize the key ingredients of the vector manifestaion formulated in the hidden local symmetry theory, in which the $\rho$ meson becomes massless degenerated with the pion at the chiral phase transition point. |
hep-ph/0005144 | Christopher D. Carone | Carl E. Carlson and Christopher D. Carone (William and Mary) | Predictions for Decays of Radially Excited Baryons | 11 pages RevTeX, 1 eps figure. One minor revision | Phys.Lett. B484 (2000) 260-266 | 10.1016/S0370-2693(00)00646-8 | WM-00-105 | hep-ph | null | We consider the strong decays of the lowest-lying radially excited baryons,
in SU(6) language the states comprising the first excited 56-plet. Assuming a
single-quark decay approximation, and negligible configuration mixing, we make
model-independent predictions for the partial decay widths to final states with
a single meson. Masses of unobserved states are predicted using results from
large-N_c QCD, and the momentum dependence of the one-body decay amplitude is
determined phenomenologically by fitting to observed decays, so that the baryon
spatial wave functions are not assumed. We point out that comparison of these
predictions to experiment may shed light on whether the Roper resonance can be
consistently interpreted as a three-quark state.
| [
{
"created": "Mon, 15 May 2000 21:06:11 GMT",
"version": "v1"
},
{
"created": "Wed, 24 May 2000 14:47:29 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Carlson",
"Carl E.",
"",
"William and Mary"
],
[
"Carone",
"Christopher D.",
"",
"William and Mary"
]
] | We consider the strong decays of the lowest-lying radially excited baryons, in SU(6) language the states comprising the first excited 56-plet. Assuming a single-quark decay approximation, and negligible configuration mixing, we make model-independent predictions for the partial decay widths to final states with a single meson. Masses of unobserved states are predicted using results from large-N_c QCD, and the momentum dependence of the one-body decay amplitude is determined phenomenologically by fitting to observed decays, so that the baryon spatial wave functions are not assumed. We point out that comparison of these predictions to experiment may shed light on whether the Roper resonance can be consistently interpreted as a three-quark state. |
hep-ph/9507469 | null | Bo-Qiang Ma and Tao Huang | Consequence of the Wigner Rotation: Perturbative QCD Analysis of the
Pion Form Factor | 18 Latex pages, two postscript figures included | J.Phys. G21 (1995) 765-7776 | 10.1088/0954-3899/21/6/006 | null | hep-ph | null | We analyse the perturbative contributions from the higher helicity
($\lambda_{1}+\lambda_{1}=\pm 1$) components, which should be naturally
contained in the light-cone wave function for the pion as a consequence of the
Wigner rotation, in the QCD calculation of the pion form factor. It is pointed
out that the contributions may provide the other fraction needed to fit the
pion form factor data besides the perturbative contributions from the ordinary
helicity components evaluated using the factorization formula with the
asymptotic form of the distribution amplitude. We suggest a way to test the
higher helicity state contributions.
| [
{
"created": "Tue, 1 Aug 1995 15:37:39 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Ma",
"Bo-Qiang",
""
],
[
"Huang",
"Tao",
""
]
] | We analyse the perturbative contributions from the higher helicity ($\lambda_{1}+\lambda_{1}=\pm 1$) components, which should be naturally contained in the light-cone wave function for the pion as a consequence of the Wigner rotation, in the QCD calculation of the pion form factor. It is pointed out that the contributions may provide the other fraction needed to fit the pion form factor data besides the perturbative contributions from the ordinary helicity components evaluated using the factorization formula with the asymptotic form of the distribution amplitude. We suggest a way to test the higher helicity state contributions. |
hep-ph/9704457 | null | Howard Baer, Chih-hao Chen, Manuel Drees, Frank Paige and Xerxes Tata | Collider Phenomenology for Supersymmetry at Large $tan\beta$ | 8 page REVTEX file with 2 EPS figures | Phys.Rev.Lett.79:986-989,1997; Erratum-ibid.80:642,1998 | 10.1103/PhysRevLett.79.986 | FSU-HEP-970501, UCD 97-12, APCTP 97-09, UH-511-870-97 | hep-ph | null | If the parameter $tan \beta$ of the minimal supersymmetric model is large,
then $b$ and $\tau$ Yukawa interactions are important. These can significantly
modify the masses and decays of sparticles. We describe new calculations which
allow a reliable exploration of large $tan \beta$ values, and discuss
implications for collider experiments. For large values of $tan \beta$,
charginos and neutralinos may dominantly decay to $\tau$-leptons or $b$-quarks.
The usual cross sections for multilepton signatures may be greatly reduced, but
SUSY may be detectable via new signals involving $\tau$'s or $b$'s in the final
state.
| [
{
"created": "Wed, 30 Apr 1997 21:32:36 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Baer",
"Howard",
""
],
[
"Chen",
"Chih-hao",
""
],
[
"Drees",
"Manuel",
""
],
[
"Paige",
"Frank",
""
],
[
"Tata",
"Xerxes",
""
]
] | If the parameter $tan \beta$ of the minimal supersymmetric model is large, then $b$ and $\tau$ Yukawa interactions are important. These can significantly modify the masses and decays of sparticles. We describe new calculations which allow a reliable exploration of large $tan \beta$ values, and discuss implications for collider experiments. For large values of $tan \beta$, charginos and neutralinos may dominantly decay to $\tau$-leptons or $b$-quarks. The usual cross sections for multilepton signatures may be greatly reduced, but SUSY may be detectable via new signals involving $\tau$'s or $b$'s in the final state. |
hep-ph/9712399 | Oleg Yakovlev | S. Weinzierl and O. Yakovlev | |V_{ub}| and Perturbative QCD Effects in the $B\to\pi$ Transition Form
Factor | 7 pages, Latex, 3 figures included, Talk given by O. Yakovlev at IV
Int. Workshop on Progress in Heavy Quark Physics, Rostock, September 20-22 | null | null | WUE-ITP-97-050, SPhT-T97/139 | hep-ph | null | We report on recent improvements for the $B\to\pi$ form factor. The updated
value of $|V_{ub}|$ is presented.
| [
{
"created": "Tue, 16 Dec 1997 17:31:32 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Weinzierl",
"S.",
""
],
[
"Yakovlev",
"O.",
""
]
] | We report on recent improvements for the $B\to\pi$ form factor. The updated value of $|V_{ub}|$ is presented. |
2110.13865 | Bingrong Yu | Yilin Wang, Bingrong Yu, Shun Zhou | Reply to "Comment on 'Flavor invariants and renormalization-group
equations in the leptonic sector with massive Majorana neutrinos'" | 4 pages, a brief reply to the incorrect and misleading comments on
our original paper | null | null | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the preprint arXiv:2110.08210, some comments on our paper recently
published in JHEP \textbf{09} (2021) 053 have been made. Since some of the
comments are completely wrong and others are quite misleading, we decide to
clarify the relevant issues in a formal reply. First of all, nothing is wrong
about our calculations and physical results in the original paper. Second,
there is no logical gap to fill at all. The fact that the $N$-dimensional
unitary group over the field of complex numbers ${\rm U}(N,\mathbb{C})$ is not
a linear algebraic group is actually irrelevant for the validity of the
Molien-Weyl formula. As we shall explain in this reply, all the comments in
arXiv:2110.08210 arise from the misunderstanding and misinterpretation of our
discussions and results.
| [
{
"created": "Tue, 26 Oct 2021 17:17:32 GMT",
"version": "v1"
}
] | 2021-10-27 | [
[
"Wang",
"Yilin",
""
],
[
"Yu",
"Bingrong",
""
],
[
"Zhou",
"Shun",
""
]
] | In the preprint arXiv:2110.08210, some comments on our paper recently published in JHEP \textbf{09} (2021) 053 have been made. Since some of the comments are completely wrong and others are quite misleading, we decide to clarify the relevant issues in a formal reply. First of all, nothing is wrong about our calculations and physical results in the original paper. Second, there is no logical gap to fill at all. The fact that the $N$-dimensional unitary group over the field of complex numbers ${\rm U}(N,\mathbb{C})$ is not a linear algebraic group is actually irrelevant for the validity of the Molien-Weyl formula. As we shall explain in this reply, all the comments in arXiv:2110.08210 arise from the misunderstanding and misinterpretation of our discussions and results. |
hep-ph/9912411 | Kazutaka Sudou | Kazutaka Sudoh and Toshiyuki Morii (Kobe Univ.) | Two-Spin Asymmetry for $\psi^{\prime}$ Photoproduction with Color-Octet
Mechanism | 8 pages including 4 eps-figures, use epsfig.tex, Latex | Phys.Rev.D62:057501,2000 | 10.1103/PhysRevD.62.057501 | KOBE-FHD-99-05 | hep-ph | null | We studied the photoproduction of $\psi^{\prime}$ in the forward regions in
polarized $\gamma p$ collisions at relevant HERA energies. We found that this
reaction is very effective to test the color-octet mechanism which is based on
the NRQCD factorization formalism. Furthermore we found that the value of the
NRQCD matrix elements can be severely constrained by measuring the two-spin
asymmetry, though the process depends on the polarized gluon distribution
$\Delta g(x)$.
| [
{
"created": "Sat, 18 Dec 1999 01:38:47 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Feb 2000 06:32:11 GMT",
"version": "v2"
}
] | 2011-03-23 | [
[
"Sudoh",
"Kazutaka",
"",
"Kobe Univ."
],
[
"Morii",
"Toshiyuki",
"",
"Kobe Univ."
]
] | We studied the photoproduction of $\psi^{\prime}$ in the forward regions in polarized $\gamma p$ collisions at relevant HERA energies. We found that this reaction is very effective to test the color-octet mechanism which is based on the NRQCD factorization formalism. Furthermore we found that the value of the NRQCD matrix elements can be severely constrained by measuring the two-spin asymmetry, though the process depends on the polarized gluon distribution $\Delta g(x)$. |
1304.3787 | Sourendu Gupta | Partha Pratim Bhaduri and Sourendu Gupta | Fractal structure of near-threshold quarkonium production off cold
nuclear matter | 2 figures | null | null | TIFR/TH/13-09 | hep-ph nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate near-threshold production of quarkonium resonances in cold
nuclear matter through a scaling theory with two exponents which are fixed by
existing data on near-threshold J/psi production in proton-nucleus collisions.
Interestingly, it seems possible to extend one of the multifractal dimensions
to the production of other mesons in cold nuclear matter. The scaling theory
can be tested and refined in experiments at the upcoming high-intensity FAIR
accelerator complex in GSI.
| [
{
"created": "Sat, 13 Apr 2013 07:58:23 GMT",
"version": "v1"
}
] | 2013-04-16 | [
[
"Bhaduri",
"Partha Pratim",
""
],
[
"Gupta",
"Sourendu",
""
]
] | We investigate near-threshold production of quarkonium resonances in cold nuclear matter through a scaling theory with two exponents which are fixed by existing data on near-threshold J/psi production in proton-nucleus collisions. Interestingly, it seems possible to extend one of the multifractal dimensions to the production of other mesons in cold nuclear matter. The scaling theory can be tested and refined in experiments at the upcoming high-intensity FAIR accelerator complex in GSI. |
2304.04680 | Bodo Lampe | Bodo Lampe | On the Relations between Fermion Masses and Isospin Couplings in the
Microscopic Model | 48 pages | null | null | null | hep-ph | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Quark and lepton masses and mixings are considered in the framework of the
microscopic model. The most general ansatz for the interactions among tetrons
leads to a Hamiltonian $H_T$ involving Dzyaloshinskii-Moriya (DM), Heisenberg
and torsional isospin forces. Diagonalization of the Hamiltonian provides for
24 eigenvalues which are identified as the quark and lepton masses. While the
masses of the third and second family arise from DM and Heisenberg type of
isospin interactions, light family masses are related to torsional interactions
among tetrons. Neutrino masses turn out to be special in that they are given in
terms of tiny isospin non-conserving DM, Heisenberg and torsional couplings.
The approach not only leads to masses, but also allows to calculate the quark
and lepton eigenstates, an issue, which is important for the determination of
the CKM and PMNS mixing matrices. Compact expressions for the eigenfunctions of
$H_T$ are given. The almost exact isospin conservation of the system dictates
the form of the lepton states and makes them independent of all the couplings
in $H_T$. Much in contrast, there is a strong dependence of the quark states on
the coupling strengths, and a promising hierarchy between the quark families
shows up.
| [
{
"created": "Thu, 30 Mar 2023 19:25:26 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Sep 2023 08:25:15 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Mar 2024 10:10:39 GMT",
"version": "v3"
}
] | 2024-03-22 | [
[
"Lampe",
"Bodo",
""
]
] | Quark and lepton masses and mixings are considered in the framework of the microscopic model. The most general ansatz for the interactions among tetrons leads to a Hamiltonian $H_T$ involving Dzyaloshinskii-Moriya (DM), Heisenberg and torsional isospin forces. Diagonalization of the Hamiltonian provides for 24 eigenvalues which are identified as the quark and lepton masses. While the masses of the third and second family arise from DM and Heisenberg type of isospin interactions, light family masses are related to torsional interactions among tetrons. Neutrino masses turn out to be special in that they are given in terms of tiny isospin non-conserving DM, Heisenberg and torsional couplings. The approach not only leads to masses, but also allows to calculate the quark and lepton eigenstates, an issue, which is important for the determination of the CKM and PMNS mixing matrices. Compact expressions for the eigenfunctions of $H_T$ are given. The almost exact isospin conservation of the system dictates the form of the lepton states and makes them independent of all the couplings in $H_T$. Much in contrast, there is a strong dependence of the quark states on the coupling strengths, and a promising hierarchy between the quark families shows up. |
2307.10637 | Michael Sarrazin | Michael Sarrazin, Coraline Stasser | Violation of C/CP Symmetry Induced by a Scalar Field Emerging from a
Two-Brane Universe: A Gateway to Baryogenesis | 12 pages, 5 figures. Final version, accepted for publication in
Physical Review D | Phys. Rev. D 110, 023520 (2024) | 10.1103/PhysRevD.110.023520 | null | hep-ph astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A model of baryogenesis is introduced where our usual visible Universe is a
3-brane coevolving with a hidden 3-brane in a multidimensional bulk. The
visible matter and antimatter sectors are naturally coupled with the hidden
matter and antimatter sectors, breaking the C/CP invariance and leading to
baryogenesis occurring after the quark-gluon era. The issue of leptogenesis is
also discussed. The symmetry breaking spontaneously occurs due to the presence
of an extra scalar field supported by the $U(1)\otimes U(1)$ gauge group, which
extends the conventional electromagnetic gauge field in the two-brane universe.
Observational consequences are discussed.
| [
{
"created": "Thu, 20 Jul 2023 07:05:25 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Aug 2023 16:10:20 GMT",
"version": "v2"
},
{
"created": "Sun, 5 Nov 2023 11:40:26 GMT",
"version": "v3"
},
{
"created": "Mon, 17 Jun 2024 15:56:13 GMT",
"version": "v4"
}
] | 2024-07-17 | [
[
"Sarrazin",
"Michael",
""
],
[
"Stasser",
"Coraline",
""
]
] | A model of baryogenesis is introduced where our usual visible Universe is a 3-brane coevolving with a hidden 3-brane in a multidimensional bulk. The visible matter and antimatter sectors are naturally coupled with the hidden matter and antimatter sectors, breaking the C/CP invariance and leading to baryogenesis occurring after the quark-gluon era. The issue of leptogenesis is also discussed. The symmetry breaking spontaneously occurs due to the presence of an extra scalar field supported by the $U(1)\otimes U(1)$ gauge group, which extends the conventional electromagnetic gauge field in the two-brane universe. Observational consequences are discussed. |
hep-ph/9806314 | Piet Mulders | P.J. Mulders and T. Sloan | Spin physics in deep inelastic scattering | 15 pages with 2 figures, LaTex, uses sprocl.sty and epsfig.sty.
Summary talk of Spin Physics working group at the $6^{th}$ International
Workshop on Deep Inelastic Scattering and QCD, Brussels (1998). Corrected
some typos and added a reference | null | null | VUTH 98-17, LANCS/HEP/9806 | hep-ph | null | The problem of our understanding of the spin structure of the nucleon has
been with us since the publication of the EMC measurements of the polarised
structure function of the proton in 1987. In this talk a brief history of the
subject is given followed by a review of the results presented in this workshop
and the progress made to date.
| [
{
"created": "Tue, 9 Jun 1998 11:35:00 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Jun 1998 10:18:34 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Mulders",
"P. J.",
""
],
[
"Sloan",
"T.",
""
]
] | The problem of our understanding of the spin structure of the nucleon has been with us since the publication of the EMC measurements of the polarised structure function of the proton in 1987. In this talk a brief history of the subject is given followed by a review of the results presented in this workshop and the progress made to date. |
hep-ph/9611245 | Charles A. Nelson | Charles A. Nelson | Tau Decays Beyond the Standard Model | 9 pages, latex, no figures Talk at TAU96 workshop | null | 10.1016/S0920-5632(97)00224-7 | SUNY BING 10/30/96 | hep-ph | null | In a recent paper, 8 semileptonic parameters were defined to specify the most
general Lorentz-invariant spin correlation functions for 2-body tau decays.
These parameters can be used to search for anomalous longitudinal-versus
transverse polarized-partial widths, for non-CKM-type leptonic CP violation,
and for leptonic T violation. They can also be used to bound the effective-mass
scales ``Lambda" for new physics arising from additional Lorentz structures,
e.g. from lepton compositeness, tau weak magnetism, weak electricity, or
second-class currents. It is emphasized that (i) for these tests ``different
modes have different merits" and that (ii) the parameters can be measured
either by using spin-correlation techniques without polarized beams, or with
longitudinally polarized beams.
| [
{
"created": "Tue, 5 Nov 1996 17:13:35 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Nelson",
"Charles A.",
""
]
] | In a recent paper, 8 semileptonic parameters were defined to specify the most general Lorentz-invariant spin correlation functions for 2-body tau decays. These parameters can be used to search for anomalous longitudinal-versus transverse polarized-partial widths, for non-CKM-type leptonic CP violation, and for leptonic T violation. They can also be used to bound the effective-mass scales ``Lambda" for new physics arising from additional Lorentz structures, e.g. from lepton compositeness, tau weak magnetism, weak electricity, or second-class currents. It is emphasized that (i) for these tests ``different modes have different merits" and that (ii) the parameters can be measured either by using spin-correlation techniques without polarized beams, or with longitudinally polarized beams. |
2405.19190 | Mohamed Krab | Wei-Shu Hou, Mohamed Krab | Reconstructing the general 2HDM charged Higgs boson at the LHC | v2: 5 pages, 5 figures, matches version accepted for publication in
PRD | null | null | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the discovery prospects for a charged Higgs boson via the $b g\to c
H^- \to c \bar t b$ process at the Large Hadron Collider (LHC). Focusing on the
general Two Higgs Doublet Model (G2HDM) that possesses extra Yukawa couplings,
the process is controlled by extra top couplings $\rho_{tc}$ and $\rho_{tt}$,
which can drive electroweak baryogenesis (EWBG) to account for the baryon
asymmetry of the Universe (BAU). We propose benchmark points (BPs) and
demonstrate that evidence could emerge at 14 TeV LHC and luminosity of 300
fb$^{-1}$, with discovery potential at 600 fb$^{-1}$.
| [
{
"created": "Wed, 29 May 2024 15:30:14 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jul 2024 16:12:35 GMT",
"version": "v2"
}
] | 2024-07-11 | [
[
"Hou",
"Wei-Shu",
""
],
[
"Krab",
"Mohamed",
""
]
] | We study the discovery prospects for a charged Higgs boson via the $b g\to c H^- \to c \bar t b$ process at the Large Hadron Collider (LHC). Focusing on the general Two Higgs Doublet Model (G2HDM) that possesses extra Yukawa couplings, the process is controlled by extra top couplings $\rho_{tc}$ and $\rho_{tt}$, which can drive electroweak baryogenesis (EWBG) to account for the baryon asymmetry of the Universe (BAU). We propose benchmark points (BPs) and demonstrate that evidence could emerge at 14 TeV LHC and luminosity of 300 fb$^{-1}$, with discovery potential at 600 fb$^{-1}$. |
hep-ph/0505166 | Yadong Yang | Yadong Yang, Hongjun Hao and Fang Su | Testing the chirality of b to u current with B^0 \to \rho^ - \ell^+ \nu | 9 pages, 4 eps figures. To be published in PLB | Phys.Lett. B618 (2005) 97-102 | 10.1016/j.physletb.2005.05.009 | null | hep-ph | null | We study the effects of a modest V+A admixture strength in $b\tou$ current in
the decay $B \to\rho l \nu$. We have shown that the decay rate, lepton
forward-backward distribution asymmetry $A_{FB}$ and polarization ratio are
sensitive to the admixture. Future experimental studies of the decay at BaBar
and BELLE could clarify the chirality of $b\to u$ current and might reveal
hints for New Physics with right-handed quark currents.
| [
{
"created": "Thu, 19 May 2005 02:35:31 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Yang",
"Yadong",
""
],
[
"Hao",
"Hongjun",
""
],
[
"Su",
"Fang",
""
]
] | We study the effects of a modest V+A admixture strength in $b\tou$ current in the decay $B \to\rho l \nu$. We have shown that the decay rate, lepton forward-backward distribution asymmetry $A_{FB}$ and polarization ratio are sensitive to the admixture. Future experimental studies of the decay at BaBar and BELLE could clarify the chirality of $b\to u$ current and might reveal hints for New Physics with right-handed quark currents. |
hep-ph/0201115 | Elena Gubankova | Elena Gubankova | Solving QCD Hamiltonian for Bound States | 50 pages | null | null | null | hep-ph | null | We consider the eigenstate problem for a Hamiltonian operator of the field
theory. Methods of construction the effective field theoretical Hamiltonians
for which the eigenstate problem may be solved are discussed. In particular, we
discuss the method of flow equations from a general perspective as well as in
application to the gauge field theories. Flow equations transform the
Hamiltonian to a block-diagonal form with the number of particles conserved in
each block and thus reduce the original bound state problem to a set of coupled
eigenstate equations with an effective Hamiltonian in each sector.
Applications of flow equations to the Hamiltonians of QED and QCD in the
light-front gauge and the QCD Hamiltonian in the Coulomb gauge are considered.
Using flow equations, we derive the effective Hamiltonians as well as the
renormalized gap equations and the Bethe-Salpeter equations for the bound
states in these theories. We show that the obtained equations are finite in
both UV and IR regions and are completely renormalized in UV, i.e. the
corresponding solutions do not depend on the cut-off $\Lambda$.
We calculate positronium spectrum, glueball masses, $\pi-\rho$ mass
splitting, gluon and chiral quark condensates and compare our results with the
covariant calculations and experimental results. Use of flow equations to
calculate the dynamical terms is critical to achive good agreement with
experimental results.
| [
{
"created": "Mon, 14 Jan 2002 04:18:07 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gubankova",
"Elena",
""
]
] | We consider the eigenstate problem for a Hamiltonian operator of the field theory. Methods of construction the effective field theoretical Hamiltonians for which the eigenstate problem may be solved are discussed. In particular, we discuss the method of flow equations from a general perspective as well as in application to the gauge field theories. Flow equations transform the Hamiltonian to a block-diagonal form with the number of particles conserved in each block and thus reduce the original bound state problem to a set of coupled eigenstate equations with an effective Hamiltonian in each sector. Applications of flow equations to the Hamiltonians of QED and QCD in the light-front gauge and the QCD Hamiltonian in the Coulomb gauge are considered. Using flow equations, we derive the effective Hamiltonians as well as the renormalized gap equations and the Bethe-Salpeter equations for the bound states in these theories. We show that the obtained equations are finite in both UV and IR regions and are completely renormalized in UV, i.e. the corresponding solutions do not depend on the cut-off $\Lambda$. We calculate positronium spectrum, glueball masses, $\pi-\rho$ mass splitting, gluon and chiral quark condensates and compare our results with the covariant calculations and experimental results. Use of flow equations to calculate the dynamical terms is critical to achive good agreement with experimental results. |
hep-ph/0101135 | David Rainwater | D. Rainwater (Fermilab) | Precision Higgs Physics at a Future Linear Collider | 10 pp, 4 eps fig, econf, invited talk at RADCOR 2000 (Carmel, CA,
Sept 2000), includes additional comments and citations on multiple Higgs
production | null | null | null | hep-ph | null | Assuming that a Higgs sector is responsible for electroweak symmetry
breaking, we attempt to address two important questions: How much better
precision are various measurements of Higgs boson properties at a future linear
collider than at the LHC? What can a future linear collider do for Higgs
physics that the LHC cannot?
| [
{
"created": "Fri, 12 Jan 2001 20:25:39 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Feb 2001 20:52:16 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Rainwater",
"D.",
"",
"Fermilab"
]
] | Assuming that a Higgs sector is responsible for electroweak symmetry breaking, we attempt to address two important questions: How much better precision are various measurements of Higgs boson properties at a future linear collider than at the LHC? What can a future linear collider do for Higgs physics that the LHC cannot? |
hep-ph/0504092 | Radja Boughezal | R.Boughezal, J.B.Tausk, J.J.van der Bij | Three-loop electroweak corrections to the W-boson mass and sin^2
theta_eff in the large Higgs mass limit | 12 pages, two Figures | Nucl.Phys. B725 (2005) 3-14 | 10.1016/j.nuclphysb.2005.07.013 | Freiburg-THEP 05/02 | hep-ph | null | We present an analytical calculation of the leading three-loop radiative
correction to the S-parameter in the Standard Model in the large Higgs mass
limit. Numerically, S^(3) = 1.1105*g^4/(1024 pi^3)*m_H^4/M_W^4. When combined
with the corresponding three-loop correction to the rho-parameter, this leads
to shifts of Delta^(3) sin^2 theta_eff = 4.6*10^-9*m_H^4/M_W^4 in the effective
weak mixing angle and Delta^(3) M_W = -6.3*10^-4*MeV*m_H^4/M_W^4 in the W boson
mass. For both of these observables, the sign of the three-loop correction is
equal to that of the one-loop correction.
| [
{
"created": "Tue, 12 Apr 2005 18:56:27 GMT",
"version": "v1"
}
] | 2010-04-05 | [
[
"Boughezal",
"R.",
""
],
[
"Tausk",
"J. B.",
""
],
[
"van der Bij",
"J. J.",
""
]
] | We present an analytical calculation of the leading three-loop radiative correction to the S-parameter in the Standard Model in the large Higgs mass limit. Numerically, S^(3) = 1.1105*g^4/(1024 pi^3)*m_H^4/M_W^4. When combined with the corresponding three-loop correction to the rho-parameter, this leads to shifts of Delta^(3) sin^2 theta_eff = 4.6*10^-9*m_H^4/M_W^4 in the effective weak mixing angle and Delta^(3) M_W = -6.3*10^-4*MeV*m_H^4/M_W^4 in the W boson mass. For both of these observables, the sign of the three-loop correction is equal to that of the one-loop correction. |
hep-ph/0011043 | Gonzalo Parente Bermudez | J.A. Castro Pena, G. Parente and E. Zas (Universidade de Santiago de
Compostela) | Measuring the BFKL Pomeron in Neutrino Telescopes | 12 pages, Latex, figures as 7 postscript files | Phys.Lett. B500 (2001) 125-132 | 10.1016/S0370-2693(01)00068-5 | US-FT/9-00 | hep-ph | null | We present a new method for obtaining information on the small x behavior of
the structure function F2 outside the kinematic range of present acelerators
from the mean inelasticity parameter in UHE neutrino-nucleon DIS interactions
which could be measured in neutrino telescopes.
| [
{
"created": "Thu, 2 Nov 2000 19:37:26 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Pena",
"J. A. Castro",
"",
"Universidade de Santiago de\n Compostela"
],
[
"Parente",
"G.",
"",
"Universidade de Santiago de\n Compostela"
],
[
"Zas",
"E.",
"",
"Universidade de Santiago de\n Compostela"
]
] | We present a new method for obtaining information on the small x behavior of the structure function F2 outside the kinematic range of present acelerators from the mean inelasticity parameter in UHE neutrino-nucleon DIS interactions which could be measured in neutrino telescopes. |
hep-ph/0111035 | null | F.V.Tkachov (INR, Moscow) | A verification of the Optimal Jet Finder | 2p PS | null | null | null | hep-ph hep-ex | null | The fortran-77 code [hep-ph/9912415] of the jet algorithm based on the
optimal jet definition [hep-ph/9901444] has been successfully verified (up to a
few interface bugs) using an independently evolved code written in the
object-oriented language Component Pascal [http://www.oberon.ch]. The final
fortran code OJF_014 is available on the Web.
| [
{
"created": "Mon, 5 Nov 2001 10:04:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Tkachov",
"F. V.",
"",
"INR, Moscow"
]
] | The fortran-77 code [hep-ph/9912415] of the jet algorithm based on the optimal jet definition [hep-ph/9901444] has been successfully verified (up to a few interface bugs) using an independently evolved code written in the object-oriented language Component Pascal [http://www.oberon.ch]. The final fortran code OJF_014 is available on the Web. |
1910.08574 | Jose Miguel No | D. Barducci, K. Mimasu, J. M. No, C. Vernieri and J. Zurita | Enlarging the scope of resonant di-Higgs searches: Hunting for
Higgs-to-Higgs cascades in $4b$ final states at the LHC and future colliders | 37 pages, 16 figures, 1 improved b-tagging Delphes card on demand | null | 10.1007/JHEP02(2020)002 | null | hep-ph hep-ex | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the coverage of resonant di-Higgs searches in the $b \bar{b} b
\bar{b}$ final state to the process $p p \to H_1 \to H_2 H_2 \to b \bar{b} b
\bar{b}$, where both $H_{1,2}$ are spin-$0$ states beyond the Standard Model.
Such a process constitutes a joint discovery mode for the new states $H_1$ and
$H_2$. We present the first sensitivity study of this channel, using public LHC
data to validate our analysis. We also provide a first estimate of the
sensitivity of the search for the HL-LHC and future facilities like the HE-LHC
and FCC-hh. We analyze the discovery potential of this search for several
non-minimal scalar sector scenarios: an extension of the SM with two extra
singlet scalar fields, the two-Higgs-doublet model and a two-Higgs doublet
model plus a singlet, which captures the scalar potential features of the
NMSSM. We find that this channel represents a novel, very powerful probe for
extended Higgs sectors, offering complementary sensitivity to existing
analyses.
| [
{
"created": "Fri, 18 Oct 2019 18:15:06 GMT",
"version": "v1"
}
] | 2020-03-18 | [
[
"Barducci",
"D.",
""
],
[
"Mimasu",
"K.",
""
],
[
"No",
"J. M.",
""
],
[
"Vernieri",
"C.",
""
],
[
"Zurita",
"J.",
""
]
] | We extend the coverage of resonant di-Higgs searches in the $b \bar{b} b \bar{b}$ final state to the process $p p \to H_1 \to H_2 H_2 \to b \bar{b} b \bar{b}$, where both $H_{1,2}$ are spin-$0$ states beyond the Standard Model. Such a process constitutes a joint discovery mode for the new states $H_1$ and $H_2$. We present the first sensitivity study of this channel, using public LHC data to validate our analysis. We also provide a first estimate of the sensitivity of the search for the HL-LHC and future facilities like the HE-LHC and FCC-hh. We analyze the discovery potential of this search for several non-minimal scalar sector scenarios: an extension of the SM with two extra singlet scalar fields, the two-Higgs-doublet model and a two-Higgs doublet model plus a singlet, which captures the scalar potential features of the NMSSM. We find that this channel represents a novel, very powerful probe for extended Higgs sectors, offering complementary sensitivity to existing analyses. |
hep-ph/0011298 | Ramona Vogt | R. Vogt | Physics of the Nucleon Sea Quark Distributions | 83 pages LaTeX, 28 .eps figures, style files included | Prog.Part.Nucl.Phys.45:S105-S169,2000 | 10.1016/S0146-6410(00)90012-7 | LBNL-45333 | hep-ph | null | Sea quark distributions in the nucleon have naively been expected to be
generated perturbatively by gluon splitting. In this case, there is no reason
for the light quark and anti-quark sea distributions to be different. No
asymmetries in the strange or heavy quark sea distributions are predicted in
the improved parton model. However, recent experiments have called these naive
expectations into question. A violation of the Gottfried sum rule has been
measured in several experiments, suggesting that $\bar u < \bar d$ in the
proton. Additionally, other measurements, while not definitive, show that there
may be an asymmetry in the strange and anti-strange quark sea distributions.
These effects may require nonperturbative explanations. In this review we first
discuss the perturbative aspects of the sea quark distributions. We then
describe the experiments that could point to nonperturbative contributions to
the nucleon sea. Current phenomenological models that could explain some of
these effects are reviewed.
| [
{
"created": "Fri, 24 Nov 2000 13:14:01 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Vogt",
"R.",
""
]
] | Sea quark distributions in the nucleon have naively been expected to be generated perturbatively by gluon splitting. In this case, there is no reason for the light quark and anti-quark sea distributions to be different. No asymmetries in the strange or heavy quark sea distributions are predicted in the improved parton model. However, recent experiments have called these naive expectations into question. A violation of the Gottfried sum rule has been measured in several experiments, suggesting that $\bar u < \bar d$ in the proton. Additionally, other measurements, while not definitive, show that there may be an asymmetry in the strange and anti-strange quark sea distributions. These effects may require nonperturbative explanations. In this review we first discuss the perturbative aspects of the sea quark distributions. We then describe the experiments that could point to nonperturbative contributions to the nucleon sea. Current phenomenological models that could explain some of these effects are reviewed. |
hep-ph/0309140 | Oswald Michaela | Michaela Oswald | The kinetic energy for the static SU(2) Polyakov line | 9 pages, 3 figures. Proceedings for Cracow School of Theoretical
Physics, Zakopane, May 30 - June 08, 2003 | Acta Phys.Polon. B34 (2003) 5847-5856 | null | null | hep-ph | null | At very high temperatures Yang--Mills theories can be described through
perturbation theory. At the tree level the time components of the gluon fields
decouple and yield a dimensionally reduced theory. The expectation value of the
Polyakov loop then assumes values of the Z(N) center group. At intermediate
temperatures, however, this is not true anymore. The time dependence shows up
in loops. In a recent work we integrated out fast varying quantum fluctuations
around background A_i and static A_4 fields. We assumed that these fields are
slowly varying but that the amplitude of A_4 is arbitrary. As a result we
obtained the kinetic energy terms for the Polyakov loop both for the electric
and the magnetic sector of SU(2).
| [
{
"created": "Fri, 12 Sep 2003 11:02:40 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Oswald",
"Michaela",
""
]
] | At very high temperatures Yang--Mills theories can be described through perturbation theory. At the tree level the time components of the gluon fields decouple and yield a dimensionally reduced theory. The expectation value of the Polyakov loop then assumes values of the Z(N) center group. At intermediate temperatures, however, this is not true anymore. The time dependence shows up in loops. In a recent work we integrated out fast varying quantum fluctuations around background A_i and static A_4 fields. We assumed that these fields are slowly varying but that the amplitude of A_4 is arbitrary. As a result we obtained the kinetic energy terms for the Polyakov loop both for the electric and the magnetic sector of SU(2). |
1902.11254 | Shaikh Saad | Shaikh Saad | On the Origin of Two-Loop Neutrino Mass from SU(5) Grand Unification | 29 pages, 5 figures; replacement to match with the published version | Phys. Rev. D 99, 115016 (2019) | 10.1103/PhysRevD.99.115016 | OSU-HEP-19-02 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we propose a renormalizable model based on the $SU(5)$ gauge
group where neutrino mass originates at the two-loop level without extending
the fermionic content of the Standard Model (SM). Unlike the conventional
$SU(5)$ models, in this proposed scenario, neutrino mass is intertwined with
the charged fermion masses. In addition to correctly reproducing the SM charged
fermion masses and mixings, neutrino mass is generated at the quantum level,
hence naturally explains the smallness of neutrino masses. In this set-up, we
provide examples of gauge coupling unification that simultaneously satisfy the
proton decay constraints. This model has the potential to be tested
experimentally by measuring the proton decay in the future experiments. Scalar
leptoquarks that are naturally contained within this framework can accommodate
the recent B-physics anomalies.
| [
{
"created": "Thu, 28 Feb 2019 17:57:07 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Jun 2019 16:12:34 GMT",
"version": "v2"
}
] | 2019-06-19 | [
[
"Saad",
"Shaikh",
""
]
] | In this work we propose a renormalizable model based on the $SU(5)$ gauge group where neutrino mass originates at the two-loop level without extending the fermionic content of the Standard Model (SM). Unlike the conventional $SU(5)$ models, in this proposed scenario, neutrino mass is intertwined with the charged fermion masses. In addition to correctly reproducing the SM charged fermion masses and mixings, neutrino mass is generated at the quantum level, hence naturally explains the smallness of neutrino masses. In this set-up, we provide examples of gauge coupling unification that simultaneously satisfy the proton decay constraints. This model has the potential to be tested experimentally by measuring the proton decay in the future experiments. Scalar leptoquarks that are naturally contained within this framework can accommodate the recent B-physics anomalies. |
hep-ph/0601148 | Chong Sheng Li | Zhao Li, Chong Sheng Li, Qiang Li | Associated Production of Neutral Higgs Boson with Squark Pair in the
Minimal Supersymmetric Standard Model with Explicit CP Violation at the CERN
LHC | 4 pages, 7 figures, version to appear in PRD | Phys.Rev. D73 (2006) 077701 | 10.1103/PhysRevD.73.077701 | null | hep-ph | null | We investigate the associated production of neutral Higgs boson with squark
pair in the minimal supersymmetric standard model with and without explicit CP
violation, respectively. We show that the dominant productions in both cases
are always ones of the lightest neutral Higgs boson associated with the
lightest stop pair, which can reach a few pb, in the ranges of parameters
allowed by constraints from the electric dipole moment experiments. In most of
the parameter space, the total cross sections in the case with explicit CP
violation are significantly enhanced, compared with ones without explicit CP
violation. For some special parameters, several orders of magnitude enhancement
can be obtained.
| [
{
"created": "Wed, 18 Jan 2006 14:30:06 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Jan 2006 03:27:33 GMT",
"version": "v2"
},
{
"created": "Sun, 9 Apr 2006 07:46:26 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Li",
"Zhao",
""
],
[
"Li",
"Chong Sheng",
""
],
[
"Li",
"Qiang",
""
]
] | We investigate the associated production of neutral Higgs boson with squark pair in the minimal supersymmetric standard model with and without explicit CP violation, respectively. We show that the dominant productions in both cases are always ones of the lightest neutral Higgs boson associated with the lightest stop pair, which can reach a few pb, in the ranges of parameters allowed by constraints from the electric dipole moment experiments. In most of the parameter space, the total cross sections in the case with explicit CP violation are significantly enhanced, compared with ones without explicit CP violation. For some special parameters, several orders of magnitude enhancement can be obtained. |
0807.0708 | Stefan Kallweit | Stefan Dittmaier, Stefan Kallweit, Peter Uwer | NLO QCD corrections to pp->WW+jet+X | 6 pages, latex, 5 figures, 7 eps-files, to appear in the proceedings
of 9th Workshop on Elementary Particle Theory: Loops and Legs in Quantum
Field Theory, Sondershausen, Germany, 20-25 Apr 2008 | Nucl.Phys.Proc.Suppl.183:279-284,2008 | 10.1016/j.nuclphysbps.2008.09.117 | MPP-2008-73 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report on a calculation of the next-to-leading order QCD corrections to
the production of W-boson pairs in association with a hard jet at hadron
colliders, which is an important source of background for Higgs and new-physics
searches at the LHC. If a veto against the emission of a second hard jet is
applied, the corrections stabilize the leading-order prediction for the cross
section considerably.
| [
{
"created": "Fri, 4 Jul 2008 09:55:06 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Dittmaier",
"Stefan",
""
],
[
"Kallweit",
"Stefan",
""
],
[
"Uwer",
"Peter",
""
]
] | We report on a calculation of the next-to-leading order QCD corrections to the production of W-boson pairs in association with a hard jet at hadron colliders, which is an important source of background for Higgs and new-physics searches at the LHC. If a veto against the emission of a second hard jet is applied, the corrections stabilize the leading-order prediction for the cross section considerably. |
hep-ph/9412320 | Kim Milton | Kimball A. Milton | Absence of Species Doubling in Finite-Element Quantum Electrodynamics | 13 pages, revtex, 1 uuencoded figure | Lett.Math.Phys. 34 (1995) 285-294 | 10.1007/BF01872782 | OKHEP-94-13 | hep-ph hep-lat | null | In this letter it will be demonstrated explicitly that the finite-element
formulation of quantum electrodynamics is free from fermion doubling. We do
this by (1) examining the lattice fermion propagator and using it to compute
the one-loop vacuum polarization on the lattice, and (2) by an explict
computation of vector and axial-vector current anomalies for an arbitrary
rectangular lattice in the Schwinger model. There it is shown that requiring
that the vector current be conserved necessitates the use of a square lattice,
in which case the axial-vector current is anomalous.
| [
{
"created": "Mon, 19 Dec 1994 07:41:36 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Milton",
"Kimball A.",
""
]
] | In this letter it will be demonstrated explicitly that the finite-element formulation of quantum electrodynamics is free from fermion doubling. We do this by (1) examining the lattice fermion propagator and using it to compute the one-loop vacuum polarization on the lattice, and (2) by an explict computation of vector and axial-vector current anomalies for an arbitrary rectangular lattice in the Schwinger model. There it is shown that requiring that the vector current be conserved necessitates the use of a square lattice, in which case the axial-vector current is anomalous. |
hep-ph/9504212 | Fabian Franke | F. Franke and T. Woehrmann | Production of Supersymmetric Higgs Bosons at LEP x LHC | 8 pages, LATEX, 4 figures (not included). The complete paper
(including figures) can be obtained at
ftp://ftp.physik.uni-wuerzburg.de/pub/preprint/WUE-ITP-95-004.ps.gz | Phys.Lett. B358 (1995) 281-286 | 10.1016/0370-2693(95)01001-7 | WUE-ITP-95-004, UH-511-823-95 | hep-ph | null | Within the Minimal Supersymmetric Standard Model (MSSM), we study the
production of the neutral scalar and pseudoscalar as well as the charged Higgs
bosons together with fermions or sfermions in deep inelastic $ep$ scattering at
$\sqrt{s}=1.6$ TeV. We focus on the parameter space where a Higgs particle is
likely to be invisible at LEP2 and LHC. Although we choose gaugino/higgsino
mixing scenarios that maximize the corresponding production rates we find only
for the production of the scalar Higgs bosons in the non-supersymmetric
channels non-negligible cross sections of the order of $10^2$ fb.
| [
{
"created": "Mon, 3 Apr 1995 22:27:19 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Franke",
"F.",
""
],
[
"Woehrmann",
"T.",
""
]
] | Within the Minimal Supersymmetric Standard Model (MSSM), we study the production of the neutral scalar and pseudoscalar as well as the charged Higgs bosons together with fermions or sfermions in deep inelastic $ep$ scattering at $\sqrt{s}=1.6$ TeV. We focus on the parameter space where a Higgs particle is likely to be invisible at LEP2 and LHC. Although we choose gaugino/higgsino mixing scenarios that maximize the corresponding production rates we find only for the production of the scalar Higgs bosons in the non-supersymmetric channels non-negligible cross sections of the order of $10^2$ fb. |
1602.00215 | Carlo Giunti Dr. | C. Giunti | On the implementation of CVC in weak charged-current proton-neutron
transitions | null | null | null | null | hep-ph hep-ex | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the standard expression of the vector part of the hadronic
matrix element in weak charged-current proton-neutron transitions is in
agreement with the CVC hypothesis, contrary to a different claim in a recent
paper.
| [
{
"created": "Sun, 31 Jan 2016 09:52:46 GMT",
"version": "v1"
}
] | 2016-02-02 | [
[
"Giunti",
"C.",
""
]
] | It is shown that the standard expression of the vector part of the hadronic matrix element in weak charged-current proton-neutron transitions is in agreement with the CVC hypothesis, contrary to a different claim in a recent paper. |
2001.06233 | Manoel Messias Ferreira Junior | Jonas B. Araujo, Victor E. Mouchrek-Santos, Frederico E. P. dos
Santos, Pedro D. S. Silva, and Manoel M. Ferreira Jr | Constraining EDM and MDM lepton dimension five interactions in the
electroweak sector | It contains 9 pages, 6 tables | null | 10.1016/j.physletb.2020.135839 | null | hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate dimension five Lorentz-violating nonminimal interactions in
the electroweak sector, in connection with the possible generation of electric
dipole moment (EDM), weak electric dipole moment (WEDM), magnetic dipole moment
(MDM) and weak magnetic dipole moment (WMDM) for leptons. These couplings are
composed of the physical fields and LV tensors of ranks ranging from 1 to 4.
The CPT-odd couplings do no generate EDM\ behavior and do not provide the
correct MDM\ signature, while the CPT-even ones yield EDM and MDM\ behavior,
being subject to improved constraining. Tau lepton experimental data is used to
constrain the WEDM\ and WMDM couplings to the level of $10^{-4}\left(
\text{GeV}\right) ^{-1},$ whereas electron MDM and EDM data is employed to
improve constraints to the level of $10^{-17}\left( \text{GeV}\right) ^{-1}$
and $10^{-11}\left( \text{GeV}\right) ^{-1},$ respectively.
| [
{
"created": "Fri, 17 Jan 2020 10:54:50 GMT",
"version": "v1"
}
] | 2020-10-07 | [
[
"Araujo",
"Jonas B.",
""
],
[
"Mouchrek-Santos",
"Victor E.",
""
],
[
"Santos",
"Frederico E. P. dos",
""
],
[
"Silva",
"Pedro D. S.",
""
],
[
"Ferreira",
"Manoel M.",
"Jr"
]
] | We investigate dimension five Lorentz-violating nonminimal interactions in the electroweak sector, in connection with the possible generation of electric dipole moment (EDM), weak electric dipole moment (WEDM), magnetic dipole moment (MDM) and weak magnetic dipole moment (WMDM) for leptons. These couplings are composed of the physical fields and LV tensors of ranks ranging from 1 to 4. The CPT-odd couplings do no generate EDM\ behavior and do not provide the correct MDM\ signature, while the CPT-even ones yield EDM and MDM\ behavior, being subject to improved constraining. Tau lepton experimental data is used to constrain the WEDM\ and WMDM couplings to the level of $10^{-4}\left( \text{GeV}\right) ^{-1},$ whereas electron MDM and EDM data is employed to improve constraints to the level of $10^{-17}\left( \text{GeV}\right) ^{-1}$ and $10^{-11}\left( \text{GeV}\right) ^{-1},$ respectively. |
hep-ph/9906454 | Dmitri Khokhlov | D.L. Khokhlov | Mass hierarchy of leptons and hadrons within the framework of
electrodynamics | 4 pages, LaTeX | null | null | null | hep-ph | null | Structure of leptons and hadrons within the framework of electrodynamics is
considered. Muon and tau-lepton have the structure of 3 electrons. The mass of
muon is defined by the section of two-photon annihilation. The mass of
tau-lepton is defined by the section of three-photon annihilation. Hadrons are
characterized by the structure of 5 electrons. The masses of hadrons are
defined via the masses of muon and tau-lepton.
| [
{
"created": "Tue, 22 Jun 1999 16:14:40 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Khokhlov",
"D. L.",
""
]
] | Structure of leptons and hadrons within the framework of electrodynamics is considered. Muon and tau-lepton have the structure of 3 electrons. The mass of muon is defined by the section of two-photon annihilation. The mass of tau-lepton is defined by the section of three-photon annihilation. Hadrons are characterized by the structure of 5 electrons. The masses of hadrons are defined via the masses of muon and tau-lepton. |
0809.2933 | Kirill Tuchin | Dmitri Kharzeev, Eugene Levin, Marzia Nardi and Kirill Tuchin | J/Psi production in heavy ion collisions and gluon saturation | 25 pages, 13 figures; v2: many typos corrected, presentation improved | null | 10.1016/j.nuclphysa.2009.06.016 | TAUP-2883-08, RBRC-752 | hep-ph nucl-ex nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the inclusive J/Psi production in heavy ion collisions including
the effects of gluon saturation in the wave functions of the colliding nuclei.
We argue that the dominant production mechanism in proton--nucleus and
nucleus--nucleus collisions for heavy nuclei is different from the one in
hadron-hadron interactions. We find that the rapidity distribution of primary
J/Psi production is more peaked around midrapidity than the analogous
distribution in elementary pp collisions. We discuss the consequences of this
fact on the experimentally observed J/Psi suppression in Au-Au collisions at
RHIC energies.
| [
{
"created": "Wed, 17 Sep 2008 14:10:02 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jun 2009 13:53:03 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Kharzeev",
"Dmitri",
""
],
[
"Levin",
"Eugene",
""
],
[
"Nardi",
"Marzia",
""
],
[
"Tuchin",
"Kirill",
""
]
] | We calculate the inclusive J/Psi production in heavy ion collisions including the effects of gluon saturation in the wave functions of the colliding nuclei. We argue that the dominant production mechanism in proton--nucleus and nucleus--nucleus collisions for heavy nuclei is different from the one in hadron-hadron interactions. We find that the rapidity distribution of primary J/Psi production is more peaked around midrapidity than the analogous distribution in elementary pp collisions. We discuss the consequences of this fact on the experimentally observed J/Psi suppression in Au-Au collisions at RHIC energies. |
hep-ph/9607289 | Stefano Forte | Richard D. Ball and Stefano Forte | Inclusive Measurement of the Strong Coupling at HERA | 6 pages, plain TeX with epsf, 7 figures | null | null | Edinburgh 96/10, DFTT 36/96 | hep-ph | null | We describe the measurement of the strong coupling alpha_s from data on
inclusive DIS at high energies. We present new results using the 1994 data from
H1, and confirm directly the expected running of alpha_s.
| [
{
"created": "Thu, 11 Jul 1996 15:44:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ball",
"Richard D.",
""
],
[
"Forte",
"Stefano",
""
]
] | We describe the measurement of the strong coupling alpha_s from data on inclusive DIS at high energies. We present new results using the 1994 data from H1, and confirm directly the expected running of alpha_s. |
2304.04439 | Duc Ninh Le | Duc Ninh Le, Van Dung Le, Duc Truyen Le, Van Cuong Le | Unparticle effects at the MUonE experiment | 16 pages, 6 figures, 3 tables; matches journal version | null | null | null | hep-ph hep-ex | http://creativecommons.org/licenses/by/4.0/ | We investigate possible effects of unparticles at the MUonE experiment by
considering a general model for unparticle with broken scale invariance,
characterized by the scaling dimension $d$ and the energy scale $\mu$ at which
the scale invariance is broken. Taking into account available relevant
constraints on the couplings of the unparticles with the Standard Model (SM)
leptons, we found that the MUonE experiment at the level of 10 ppm systematic
accuracy is sensitive to such effects if $1<d\lesssim 1.4$ and $1\le \mu
\lesssim 12$ GeV for vector unparticles. The effects of scalar unparticles are
too feeble to be detected. The vector unparticles can induce a significant
shift on the best-fit value of $a_\mu^\text{had}$ at the MUonE, thereby
providing an opportunity to detect unparticles or to obtain a new bound on the
unparticle-SM couplings in the case of no anomaly.
| [
{
"created": "Mon, 10 Apr 2023 07:53:03 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Nov 2023 17:05:12 GMT",
"version": "v2"
}
] | 2023-11-22 | [
[
"Le",
"Duc Ninh",
""
],
[
"Le",
"Van Dung",
""
],
[
"Le",
"Duc Truyen",
""
],
[
"Le",
"Van Cuong",
""
]
] | We investigate possible effects of unparticles at the MUonE experiment by considering a general model for unparticle with broken scale invariance, characterized by the scaling dimension $d$ and the energy scale $\mu$ at which the scale invariance is broken. Taking into account available relevant constraints on the couplings of the unparticles with the Standard Model (SM) leptons, we found that the MUonE experiment at the level of 10 ppm systematic accuracy is sensitive to such effects if $1<d\lesssim 1.4$ and $1\le \mu \lesssim 12$ GeV for vector unparticles. The effects of scalar unparticles are too feeble to be detected. The vector unparticles can induce a significant shift on the best-fit value of $a_\mu^\text{had}$ at the MUonE, thereby providing an opportunity to detect unparticles or to obtain a new bound on the unparticle-SM couplings in the case of no anomaly. |
1812.07719 | Larbi Rahili | Brahim Ait Ouazghour, Abdesslam Arhrib, Rachid Benbrik, Mohamed Chabab
and Larbi Rahili | Theory and Phenomenology of Two Higgs Doublet Type-II Seesaw Model at
the LHC Run-2 | 42 pages, 11 figures, references added | Phys. Rev. D 100, 035031 (2019) | 10.1103/PhysRevD.100.035031 | null | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the most popular scalar extension of the Standard Model, namely the
Two Higgs doublet model, extended by a complex triplet scalar (2HDMcT). Such
considering model with a very small vacuum expectation value, provides a
solution to the massive neutrinos through the so-called type II seesaw
mechanism. We show that the 2HDMcT enlarged parameter space allow for a rich
and interesting phenomenology compatible with current experimental constraints.
In this paper the 2HDMcT is subject to a detailed scrutiny. Indeed, a complete
set of tree level unitarity constraints on the coupling parameters of the
potential is determined, and the exact tree-level boundedness from below
constraints on these couplings are generated for all directions. We then
perform an extensive parameter scan in the 2HDMcT parameter space, delimited by
the above derived theoretical constraints as well as by experimental limits. We
find that an important triplet admixtures are still compatible with the Higgs
data and investigate which observables will allow to restrict the triplet
nature most effectively in the next runs of the LHC. Finally, we emphasize new
production and decay channels and their phenomenological relevance and
treatment at the LHC.
| [
{
"created": "Mon, 17 Dec 2018 00:28:36 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Feb 2019 14:54:49 GMT",
"version": "v2"
}
] | 2019-09-04 | [
[
"Ouazghour",
"Brahim Ait",
""
],
[
"Arhrib",
"Abdesslam",
""
],
[
"Benbrik",
"Rachid",
""
],
[
"Chabab",
"Mohamed",
""
],
[
"Rahili",
"Larbi",
""
]
] | We study the most popular scalar extension of the Standard Model, namely the Two Higgs doublet model, extended by a complex triplet scalar (2HDMcT). Such considering model with a very small vacuum expectation value, provides a solution to the massive neutrinos through the so-called type II seesaw mechanism. We show that the 2HDMcT enlarged parameter space allow for a rich and interesting phenomenology compatible with current experimental constraints. In this paper the 2HDMcT is subject to a detailed scrutiny. Indeed, a complete set of tree level unitarity constraints on the coupling parameters of the potential is determined, and the exact tree-level boundedness from below constraints on these couplings are generated for all directions. We then perform an extensive parameter scan in the 2HDMcT parameter space, delimited by the above derived theoretical constraints as well as by experimental limits. We find that an important triplet admixtures are still compatible with the Higgs data and investigate which observables will allow to restrict the triplet nature most effectively in the next runs of the LHC. Finally, we emphasize new production and decay channels and their phenomenological relevance and treatment at the LHC. |
2307.14301 | Rodrigo Alonso Dr | Rodrigo Alonso | A primer on Higgs Effective Field Theory with Geometry | 34 pages, 5 figures, 11 exercises for students to try | null | null | IPPP/23/38 | hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | These lecture notes, prepared for the 2022 QUC summer school at KIAS, provide
an introduction to Higgs Effective Field Theory and the use of field geometry
in Quantum Field Theory. While not sounding the depths of any of these topics,
we will cover and give a sense of the inner workings of: the action for
Goldstone bosons, the independence of scattering amplitudes from field
parametrisations, linear vs non-linear realizations --their `geography' and
experimental prospects to tell them apart--, ultra-violet completions and the
LSZ formula for fields in curved space.
| [
{
"created": "Wed, 26 Jul 2023 17:02:29 GMT",
"version": "v1"
}
] | 2023-07-27 | [
[
"Alonso",
"Rodrigo",
""
]
] | These lecture notes, prepared for the 2022 QUC summer school at KIAS, provide an introduction to Higgs Effective Field Theory and the use of field geometry in Quantum Field Theory. While not sounding the depths of any of these topics, we will cover and give a sense of the inner workings of: the action for Goldstone bosons, the independence of scattering amplitudes from field parametrisations, linear vs non-linear realizations --their `geography' and experimental prospects to tell them apart--, ultra-violet completions and the LSZ formula for fields in curved space. |
0807.0605 | Thomas Binoth Dr. | T. Binoth, A. Guffanti, J.-Ph. Guillet, G. Heinrich, S. Karg, N.
Kauer, P. Mertsch, T. Reiter, J. Reuter, G. Sanguinetti | Precise predictions for LHC using a GOLEM | Contribution to the Proceedings of the 9th DESY workshop on "Loops
and Legs in Quantum Field Theory", Sondershausen, April 2008. 6 pages latex,
5 eps figures included, replaced with final version, references updated | Nucl.Phys.Proc.Suppl.183:91-96,2008 | 10.1016/j.nuclphysbps.2008.09.088 | Edinburgh 2008/24, IPPP/08/49, DCPT/08/98, LAPTH/CONF-1260/08, PITHA
08/17 | hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this talk we present recent next-to-leading order results relevant for LHC
phenomenology obtained with the GOLEM method. After reviewing the status of
this Feynman diagrammatic approach for multi-leg one-loop calculations we
discuss three applications: the loop-induced process gg -> Z^*Z^* and the
virtual corrections to the five and six point processes qq -> ZZg and u ubar ->
s sbar c cbar. We demonstrate that our method leads to representations of such
amplitudes which allow for efficient phase space integration. In this context
we propose a reweighting technique of the leading order unweighted events by
local K-factors.
| [
{
"created": "Thu, 3 Jul 2008 17:47:20 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Aug 2008 09:07:58 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Binoth",
"T.",
""
],
[
"Guffanti",
"A.",
""
],
[
"Guillet",
"J. -Ph.",
""
],
[
"Heinrich",
"G.",
""
],
[
"Karg",
"S.",
""
],
[
"Kauer",
"N.",
""
],
[
"Mertsch",
"P.",
""
],
[
"Reiter",
"T.",
... | In this talk we present recent next-to-leading order results relevant for LHC phenomenology obtained with the GOLEM method. After reviewing the status of this Feynman diagrammatic approach for multi-leg one-loop calculations we discuss three applications: the loop-induced process gg -> Z^*Z^* and the virtual corrections to the five and six point processes qq -> ZZg and u ubar -> s sbar c cbar. We demonstrate that our method leads to representations of such amplitudes which allow for efficient phase space integration. In this context we propose a reweighting technique of the leading order unweighted events by local K-factors. |
hep-ph/0206026 | Takeo Moroi | Takeo Moroi and Tomo Takahashi | Cosmic Density Perturbations from Late-Decaying Scalar Condensations | 31pages, 14figures | Phys.Rev.D66:063501,2002 | 10.1103/PhysRevD.66.063501 | TU-654 | hep-ph astro-ph | null | We study the cosmic density perturbations induced from fluctuation of the
amplitude of late-decaying scalar condensations (called \phi) in the scenario
where the scalar field \phi once dominates the universe. In such a scenario,
the cosmic microwave background (CMB) radiation originates to decay products of
the scalar condensation and hence its anisotropy is affected by the fluctuation
of \phi. It is shown that the present cosmic density perturbations can be
dominantly induced from the primordial fluctuation of \phi, not from the
fluctuation of the inflaton field. This scenario may change constraints on the
source of the density perturbations, like inflation. In addition, a correlated
mixture of adiabatic and isocurvature perturbations may arise in such a
scenario; possible signals in the CMB power spectrum are discussed. We also
show that the simplest scenario of generating the cosmic density perturbations
only from the primordial fluctuation of \phi (i.e., so-called ``curvaton''
scenario) is severely constrained by the current measurements of the CMB
angular power spectrum if correlated mixture of the adiabatic and isocurvature
perturbations are generated.
| [
{
"created": "Tue, 4 Jun 2002 07:38:55 GMT",
"version": "v1"
}
] | 2011-05-05 | [
[
"Moroi",
"Takeo",
""
],
[
"Takahashi",
"Tomo",
""
]
] | We study the cosmic density perturbations induced from fluctuation of the amplitude of late-decaying scalar condensations (called \phi) in the scenario where the scalar field \phi once dominates the universe. In such a scenario, the cosmic microwave background (CMB) radiation originates to decay products of the scalar condensation and hence its anisotropy is affected by the fluctuation of \phi. It is shown that the present cosmic density perturbations can be dominantly induced from the primordial fluctuation of \phi, not from the fluctuation of the inflaton field. This scenario may change constraints on the source of the density perturbations, like inflation. In addition, a correlated mixture of adiabatic and isocurvature perturbations may arise in such a scenario; possible signals in the CMB power spectrum are discussed. We also show that the simplest scenario of generating the cosmic density perturbations only from the primordial fluctuation of \phi (i.e., so-called ``curvaton'' scenario) is severely constrained by the current measurements of the CMB angular power spectrum if correlated mixture of the adiabatic and isocurvature perturbations are generated. |
0707.3379 | Dieter Schildknecht | Dieter Schildknecht | The ratio of sigma_L/sigma_T in DIS at low x | 4 pages, 4 figures, contribution to the proceedings of DIS2007 | null | null | null | hep-ph | null | Assuming helicity independence for q-qbar scattering in the color-dipole
picture, or, equivalently proportionality of sea quark and gluon distributions,
we find R(W^2,Q^2) = 0.5 (approximately) at large Q^2, where R(W^2,Q^2) denotes
the ratio of the longitudinal and transverse photoabsorption cross sections.
The forthcoming direct measurements of R(W^2,Q^2) allow one to test the
underlying hypotheses.
| [
{
"created": "Mon, 23 Jul 2007 13:29:21 GMT",
"version": "v1"
}
] | 2007-07-24 | [
[
"Schildknecht",
"Dieter",
""
]
] | Assuming helicity independence for q-qbar scattering in the color-dipole picture, or, equivalently proportionality of sea quark and gluon distributions, we find R(W^2,Q^2) = 0.5 (approximately) at large Q^2, where R(W^2,Q^2) denotes the ratio of the longitudinal and transverse photoabsorption cross sections. The forthcoming direct measurements of R(W^2,Q^2) allow one to test the underlying hypotheses. |
hep-ph/9611459 | Hnlong | Hoang Ngoc Long, (Theory Division, CERN, Geneva and Institute of
Theoretical Physics, Hanoi, Vietnam) | Resonant scattering of ultrahigh-energy neutrinos in the SU(3)_C X
SU(3)_L X U(1)_N model | 5 pages, Latex | In*Beijing 1997, Proceedings, Seventh Asia-Pacific Physics
Conference* 170-171. | null | CERN-TH/96-333 | hep-ph | null | The lepton family-number changing \Delta L = 2 neutrino reactions in the
framework of the SU(3)_C X SU(3)_L X U(1)_N model with right-handed neutrinos
are presented. These processes have a much-enhanced cross section as a result
of s-channnel resonant bilepton Y production and they should be added to
ultrahigh-energy neutrino interactions.
| [
{
"created": "Thu, 28 Nov 1996 13:06:50 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Long",
"Hoang Ngoc",
""
]
] | The lepton family-number changing \Delta L = 2 neutrino reactions in the framework of the SU(3)_C X SU(3)_L X U(1)_N model with right-handed neutrinos are presented. These processes have a much-enhanced cross section as a result of s-channnel resonant bilepton Y production and they should be added to ultrahigh-energy neutrino interactions. |
2202.11152 | Iver Brevik | Iver Brevik | Axion Electrodynamics and the Axionic Casimir Effect | 8 pages, latex | Universe 7, 133 (2021) | 10.3390/universe7050133 | null | hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | A general scheme for axion electrodynamics is given, in which a surrounding
medium of constant permittivity and permeability is assumed. Then, as an
application we give simple numerical estimates for the electromagnetic current
density produced by the electrically neutral time-dependent axions $a=a(t)$ in
a strong magnetic field. As is known, the assumption $a=a(t)$ is common under
astrophysical conditions. In the third part of the paper, we consider the
implications by assuming instead an axion amplitude $a(z)$ depending on one
coordinate $z$ only. If such an axion field is contained within two large metal
plates one obtains an axion-generated splitting of the eigenmodes for the
dispersion relation. These modes yield equal, though opposite, contributions to
the pressure on the plates. We calculate the magnitude of the splitting effect,
in a simple one-dimensional model.
| [
{
"created": "Tue, 22 Feb 2022 20:07:13 GMT",
"version": "v1"
}
] | 2022-02-24 | [
[
"Brevik",
"Iver",
""
]
] | A general scheme for axion electrodynamics is given, in which a surrounding medium of constant permittivity and permeability is assumed. Then, as an application we give simple numerical estimates for the electromagnetic current density produced by the electrically neutral time-dependent axions $a=a(t)$ in a strong magnetic field. As is known, the assumption $a=a(t)$ is common under astrophysical conditions. In the third part of the paper, we consider the implications by assuming instead an axion amplitude $a(z)$ depending on one coordinate $z$ only. If such an axion field is contained within two large metal plates one obtains an axion-generated splitting of the eigenmodes for the dispersion relation. These modes yield equal, though opposite, contributions to the pressure on the plates. We calculate the magnitude of the splitting effect, in a simple one-dimensional model. |
hep-ph/0607067 | Ambar Ghosal | Debasish Majumdar and Ambar Ghosal | Dark Matter candidate in a Heavy Higgs Model - Direct Detection Rates | 10 pages, 9 figures, figures unchanged, text modified, version to
appear in Mod. Phys. Lett. A | Mod.Phys.Lett.A23:2011-2022,2008 | 10.1142/S0217732308025954 | null | hep-ph | null | We investigate direct detection rates for Dark Matter candidates arise in a
$SU(2)_L\times U(1)_Y$ with an additional doublet Higgs proposed by Barbieri,
Hall and Rychkov. We refer this model as `Heavy Higgs Model'. The Standard
Model Higgs mass comes out in this model very heavy adopting the few per cent
chance that there is no Higgs boson mass below 200 GeV. The additional Higgs
boson develops neither any VEV due to the choice of coefficient of the scalar
potential of the model nor it has any coupling with fermions due to the
incorporation of a discrete parity symmetry. Thus, the neutral components of
the extra doublet are stable and can be considered as probable candidate of
Cold Dark Matter. We have made calculations for three different types of Dark
Matter experiments, namely, $^{76}$Ge (like GENIUS), DAMA (NaI) and XENON
($^{131}$Xe). Also demonstrated the annual variation of Dark Matter detection
in case of all three detectors considered.
| [
{
"created": "Thu, 6 Jul 2006 13:08:47 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Nov 2007 07:28:50 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Majumdar",
"Debasish",
""
],
[
"Ghosal",
"Ambar",
""
]
] | We investigate direct detection rates for Dark Matter candidates arise in a $SU(2)_L\times U(1)_Y$ with an additional doublet Higgs proposed by Barbieri, Hall and Rychkov. We refer this model as `Heavy Higgs Model'. The Standard Model Higgs mass comes out in this model very heavy adopting the few per cent chance that there is no Higgs boson mass below 200 GeV. The additional Higgs boson develops neither any VEV due to the choice of coefficient of the scalar potential of the model nor it has any coupling with fermions due to the incorporation of a discrete parity symmetry. Thus, the neutral components of the extra doublet are stable and can be considered as probable candidate of Cold Dark Matter. We have made calculations for three different types of Dark Matter experiments, namely, $^{76}$Ge (like GENIUS), DAMA (NaI) and XENON ($^{131}$Xe). Also demonstrated the annual variation of Dark Matter detection in case of all three detectors considered. |
1905.02396 | Van Que Tran | Cheng-Tse Huang, Raymundo Ramos, Van Que Tran, Yue-Lin Sming Tsai and
Tzu-Chiang Yuan | Consistency of Gauged Two Higgs Doublet Model: Gauge Sector | 51 pages, 11 figures, update references and correct typos | null | 10.1007/JHEP09(2019)048 | null | hep-ph | http://creativecommons.org/licenses/by/4.0/ | We study the constraints on the new parameters in the gauge sector of gauged
two Higgs doublet model using the electroweak precision test data collected
from the Large Electron Positron Collider (LEP) at and off the Z-pole as well
as the current Drell-Yan and high-mass dilepton resonance data from the Large
Hadron Collider (LHC). Impacts on the new parameters by the projected
sensitivities of various electroweak observables at the Circular Electron
Positron Collider (CEPC) proposed to be built in China are also discussed. We
also clarify why the St\"{u}eckelberg mass $M_Y$ for the hypercharge $U(1)_Y$
is set to be zero in the model by showing that it would otherwise lead to the
violation of the standard charge assignments for the elementary quarks and
leptons.
| [
{
"created": "Tue, 7 May 2019 08:07:25 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jun 2019 06:22:52 GMT",
"version": "v2"
}
] | 2019-10-02 | [
[
"Huang",
"Cheng-Tse",
""
],
[
"Ramos",
"Raymundo",
""
],
[
"Tran",
"Van Que",
""
],
[
"Tsai",
"Yue-Lin Sming",
""
],
[
"Yuan",
"Tzu-Chiang",
""
]
] | We study the constraints on the new parameters in the gauge sector of gauged two Higgs doublet model using the electroweak precision test data collected from the Large Electron Positron Collider (LEP) at and off the Z-pole as well as the current Drell-Yan and high-mass dilepton resonance data from the Large Hadron Collider (LHC). Impacts on the new parameters by the projected sensitivities of various electroweak observables at the Circular Electron Positron Collider (CEPC) proposed to be built in China are also discussed. We also clarify why the St\"{u}eckelberg mass $M_Y$ for the hypercharge $U(1)_Y$ is set to be zero in the model by showing that it would otherwise lead to the violation of the standard charge assignments for the elementary quarks and leptons. |
2012.14139 | Eugene Levin | E. Gotsman (Tel Aviv U.), Yu. Ivanov (JINR/UTFSM) and E. Levin (Tel
Aviv U./UTFSM) | High energy evolution for Gribov-Zwanziger confinement: solution to the
equation | 23 pp 31 figures in pdf files | Phys. Rev. D 103, 096017 (2021) | 10.1103/PhysRevD.103.096017 | null | hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper we solved the new evolution equation for high energy scattering
amplitudethat stems from the Gribov-Zwanziger approach to the confinement of
quarks and gluons. We found that (1) the energy dependence of the scattering
amplitude turns out to be the same as for QCD BFKL evolution; (2) the spectrum
of the new equation does not depend on the details of the Gribov-Zwanzinger
approach and (3) all eigenfunctions coincide with the eigenfunctions of the QCD
BFKL equation at large transverse momenta $\kappa\,\geq\,1$. The numerical
calculations show that there exist no new eigenvalues with the eigenfunctions
which decrease faster than solutions of the QCD BFKL equation at large
transverse momenta. The structure of the gluon propagator in Gribov-Zwanziger
approach, that stems from the lattice QCD and from the theoretical evaluation,
results in the exponential suppression of the eigenfunctions at long distances
and in the resolution of the difficulties, which the Colour Glass Condensate
(CGC) and some other approaches, based on perturbative QCD, face at large
impact parameters. We can conclude that the confinement of quark and gluons, at
least in the form of Gribov-Zwanziger approach, does not influence on the
scattering amplitude except solving the long standing theoretical problem of
its behaviour at large impact parameters.
| [
{
"created": "Mon, 28 Dec 2020 08:21:11 GMT",
"version": "v1"
}
] | 2021-05-26 | [
[
"Gotsman",
"E.",
"",
"Tel Aviv U."
],
[
"Ivanov",
"Yu.",
"",
"JINR/UTFSM"
],
[
"Levin",
"E.",
"",
"Tel\n Aviv U./UTFSM"
]
] | In this paper we solved the new evolution equation for high energy scattering amplitudethat stems from the Gribov-Zwanziger approach to the confinement of quarks and gluons. We found that (1) the energy dependence of the scattering amplitude turns out to be the same as for QCD BFKL evolution; (2) the spectrum of the new equation does not depend on the details of the Gribov-Zwanzinger approach and (3) all eigenfunctions coincide with the eigenfunctions of the QCD BFKL equation at large transverse momenta $\kappa\,\geq\,1$. The numerical calculations show that there exist no new eigenvalues with the eigenfunctions which decrease faster than solutions of the QCD BFKL equation at large transverse momenta. The structure of the gluon propagator in Gribov-Zwanziger approach, that stems from the lattice QCD and from the theoretical evaluation, results in the exponential suppression of the eigenfunctions at long distances and in the resolution of the difficulties, which the Colour Glass Condensate (CGC) and some other approaches, based on perturbative QCD, face at large impact parameters. We can conclude that the confinement of quark and gluons, at least in the form of Gribov-Zwanziger approach, does not influence on the scattering amplitude except solving the long standing theoretical problem of its behaviour at large impact parameters. |
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