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/9612343
|
Alex Kovner
|
Alex Kovner
|
Dual Superconductivity. Variations on a Theme
|
14 pages, latex, no figures, to be published in the special issue of
Foundations of Physics dedicated to Larry Horwitz
|
Found.Phys. 27 (1997) 101-111
|
10.1007/BF02550159
|
UMN-TH-1513-96, TPI-MINN-96/16-T
|
hep-ph hep-lat hep-th
| null |
It is pointed out that the low energy effective theory that describes the low
lying glueballs of the pure Yang Mills theory sustains static classical
stringlike solutions. We suggest that these objects can be identified with the
QCD flux tubes and their energy per unit length with the string tension.
|
[
{
"created": "Thu, 12 Dec 1996 20:22:02 GMT",
"version": "v1"
}
] |
2009-10-30
|
[
[
"Kovner",
"Alex",
""
]
] |
It is pointed out that the low energy effective theory that describes the low lying glueballs of the pure Yang Mills theory sustains static classical stringlike solutions. We suggest that these objects can be identified with the QCD flux tubes and their energy per unit length with the string tension.
|
1410.3738
|
Valery Lyubovitskij
|
Thomas Gutsche, Valery E. Lyubovitskij, Ivan Schmidt, Alfredo Vega
|
Light-front potential for heavy quarkonia constrained by the holographic
soft-wall model
|
5 pages
|
Phys. Rev. D 90, 096007 (2014)
|
10.1103/PhysRevD.90.096007
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We derive a light-front Schrodinger-type equation of motion for the
quark-antiquark wave function of heavy quarkonia imposing constraints from the
holographic soft-wall model.
|
[
{
"created": "Tue, 14 Oct 2014 15:54:20 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Nov 2014 13:04:11 GMT",
"version": "v2"
}
] |
2014-11-13
|
[
[
"Gutsche",
"Thomas",
""
],
[
"Lyubovitskij",
"Valery E.",
""
],
[
"Schmidt",
"Ivan",
""
],
[
"Vega",
"Alfredo",
""
]
] |
We derive a light-front Schrodinger-type equation of motion for the quark-antiquark wave function of heavy quarkonia imposing constraints from the holographic soft-wall model.
|
1410.6035
|
Bj\"orn Sarrazin
|
Philip Bechtle, Klaus Desch, Herbert K. Dreiner, Matthias Hamer,
Michael Kr\"amer, Ben O'Leary, Werner Porod, Bj\"orn Sarrazin, Tim Stefaniak,
Mathias Uhlenbrock, Peter Wienemann
|
How alive is constrained SUSY really?
|
6 pages, 7 figures; To appear in the Proceedings of the 37th
International Conference on High Energy Physics (ICHEP 2014), 2-9 July 2014,
Valencia, Spain
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Constrained supersymmetric models like the CMSSM might look less attractive
nowadays because of fine tuning arguments. They also might look less probable
in terms of Bayesian statistics. The question how well the model under study
describes the data, however, is answered by frequentist p-values. Thus, for the
first time, we calculate a p-value for a supersymmetric model by performing
dedicated global toy fits. We combine constraints from low-energy and
astrophysical observables, Higgs boson mass and rate measurements as well as
the non-observation of new physics in searches for supersymmetry at the LHC.
Using the framework Fittino, we perform global fits of the CMSSM to the toy
data and find that this model is excluded at more than 95% confidence level.
|
[
{
"created": "Wed, 22 Oct 2014 13:29:14 GMT",
"version": "v1"
}
] |
2014-10-23
|
[
[
"Bechtle",
"Philip",
""
],
[
"Desch",
"Klaus",
""
],
[
"Dreiner",
"Herbert K.",
""
],
[
"Hamer",
"Matthias",
""
],
[
"Krämer",
"Michael",
""
],
[
"O'Leary",
"Ben",
""
],
[
"Porod",
"Werner",
""
],
[
"Sarrazin",
"Björn",
""
],
[
"Stefaniak",
"Tim",
""
],
[
"Uhlenbrock",
"Mathias",
""
],
[
"Wienemann",
"Peter",
""
]
] |
Constrained supersymmetric models like the CMSSM might look less attractive nowadays because of fine tuning arguments. They also might look less probable in terms of Bayesian statistics. The question how well the model under study describes the data, however, is answered by frequentist p-values. Thus, for the first time, we calculate a p-value for a supersymmetric model by performing dedicated global toy fits. We combine constraints from low-energy and astrophysical observables, Higgs boson mass and rate measurements as well as the non-observation of new physics in searches for supersymmetry at the LHC. Using the framework Fittino, we perform global fits of the CMSSM to the toy data and find that this model is excluded at more than 95% confidence level.
|
2401.10127
|
Emanuele Roberto Nocera
|
Felix Hekhorn, Giacomo Magni, Emanuele R. Nocera, Tanjona R.
Rabemananjara, Juan Rojo, Adrianne Schaus, Roy Stegeman
|
Heavy Quarks in Polarised Deep-Inelastic Scattering at the Electron-Ion
Collider
|
24 pages, 15 figures, version accepted for publication in EPJC
0.1140/epjc/s10052-024-12524-z
| null | null |
Nikhef-2023-010, TIF-UNIMI-2023-27, Edinburgh 2023/2
|
hep-ph hep-ex nucl-ex nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We extend the FONLL general-mass variable-flavour-number scheme to the case
of longitudinally polarised DIS structure functions, accounting for
perturbative corrections up to $\mathcal{O}(\alpha_s^2)$. We quantify the
impact of charm quark mass and higher-order perturbative corrections on
projected measurements of inclusive and charm-tagged longitudinal asymmetries
at the Electron-Ion Collider (EIC) and at the Electron-ion collider in China
(EicC). We demonstrate how the inclusion of these corrections is essential to
compute predictions with an accuracy that matches the projected precision of
the measurements. The computation is made publicly available through the
open-source EKO and YADISM programs
|
[
{
"created": "Thu, 18 Jan 2024 16:57:58 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Feb 2024 08:19:26 GMT",
"version": "v2"
}
] |
2024-02-28
|
[
[
"Hekhorn",
"Felix",
""
],
[
"Magni",
"Giacomo",
""
],
[
"Nocera",
"Emanuele R.",
""
],
[
"Rabemananjara",
"Tanjona R.",
""
],
[
"Rojo",
"Juan",
""
],
[
"Schaus",
"Adrianne",
""
],
[
"Stegeman",
"Roy",
""
]
] |
We extend the FONLL general-mass variable-flavour-number scheme to the case of longitudinally polarised DIS structure functions, accounting for perturbative corrections up to $\mathcal{O}(\alpha_s^2)$. We quantify the impact of charm quark mass and higher-order perturbative corrections on projected measurements of inclusive and charm-tagged longitudinal asymmetries at the Electron-Ion Collider (EIC) and at the Electron-ion collider in China (EicC). We demonstrate how the inclusion of these corrections is essential to compute predictions with an accuracy that matches the projected precision of the measurements. The computation is made publicly available through the open-source EKO and YADISM programs
|
hep-ph/0205332
|
Peschanski
|
M.Boonekamp (CERN & Saclay), A.De Roeck (CERN), R.Peschanski (Saclay)
and C.Royon (Saclay & Arlington)
|
Higgs boson production via Double Pomeron Exchange at the LHC
|
6 pages, 4 eps.figures
|
Phys.Lett.B550:93-98,2002
|
10.1016/S0370-2693(02)02846-0
| null |
hep-ph
| null |
We study Higgs boson production via Double Pomeron Exchange allowing for the
presence of Pomeron remnants. We estimate the number of events produced at the
LHC collider, as a function of the Higgs boson mass and its decay channel. The
model which successfully describes the high mass dijet spectrum observed at
Tevatron (run I) is used to predict rates of events with tagged protons for the
acceptance range of the CMS/Totem experiments. Sizeable cross-sections and
encouraging event selection signals are found, demonstrating especially for
smaller Higgs boson masses the importance to study the diffractive channels.
Tagging of the Pomeron remnants can be exploited to achieve a good resolution
on the Higgs boson mass for inclusive diffractive events, by optimizing an
intermediary analysis between higher cross-sections of the fully {\it
inclusive} mode (all Pomeron remnants) and cleaner signals of the {\it
exclusive} mode (without Pomeron remnants).
|
[
{
"created": "Thu, 30 May 2002 07:45:43 GMT",
"version": "v1"
}
] |
2018-04-16
|
[
[
"Boonekamp",
"M.",
"",
"CERN & Saclay"
],
[
"De Roeck",
"A.",
"",
"CERN"
],
[
"Peschanski",
"R.",
"",
"Saclay"
],
[
"Royon",
"C.",
"",
"Saclay & Arlington"
]
] |
We study Higgs boson production via Double Pomeron Exchange allowing for the presence of Pomeron remnants. We estimate the number of events produced at the LHC collider, as a function of the Higgs boson mass and its decay channel. The model which successfully describes the high mass dijet spectrum observed at Tevatron (run I) is used to predict rates of events with tagged protons for the acceptance range of the CMS/Totem experiments. Sizeable cross-sections and encouraging event selection signals are found, demonstrating especially for smaller Higgs boson masses the importance to study the diffractive channels. Tagging of the Pomeron remnants can be exploited to achieve a good resolution on the Higgs boson mass for inclusive diffractive events, by optimizing an intermediary analysis between higher cross-sections of the fully {\it inclusive} mode (all Pomeron remnants) and cleaner signals of the {\it exclusive} mode (without Pomeron remnants).
|
2206.02466
|
Janusz Chwastowski
|
Janusz J. Chwastowski and Krzysztof Piotrzkowski and Mariusz
Przybycien
|
Exclusive Lepton Pair Production at the Electron-Ion Collider -- A
Powerful Research Tool
|
8 pages; 6 figures
| null |
10.1140/epjc/s10052-022-10820-0
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The two-photon exclusive production of lepton pairs at the Electron-Ion
Collider will open interesting research directions thanks to a very high
luminosity and clean experimental conditions. A survey of the scientific
potential of such studies is reported. In particular, we consider unique
measurements of the proton elastic electromagnetic form-factors and a
possibility of studying the anomalous electromagnetic dipole moments of $\tau$
leptons.
|
[
{
"created": "Mon, 6 Jun 2022 10:02:39 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jul 2022 16:44:23 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Sep 2022 05:02:43 GMT",
"version": "v3"
}
] |
2022-10-19
|
[
[
"Chwastowski",
"Janusz J.",
""
],
[
"Piotrzkowski",
"Krzysztof",
""
],
[
"Przybycien",
"Mariusz",
""
]
] |
The two-photon exclusive production of lepton pairs at the Electron-Ion Collider will open interesting research directions thanks to a very high luminosity and clean experimental conditions. A survey of the scientific potential of such studies is reported. In particular, we consider unique measurements of the proton elastic electromagnetic form-factors and a possibility of studying the anomalous electromagnetic dipole moments of $\tau$ leptons.
|
hep-ph/9409356
|
Simona Rolli
|
Mario Greco and Simona Rolli
|
Light mesons production at the Tevatron to next-to-leading order
|
8 pages, LaTeX,uuencoded figures appended, FERMILAB-Pub-94/324-A
|
Phys.Rev. D52 (1995) 3853-3861
|
10.1103/PhysRevD.52.3853
| null |
hep-ph
| null |
Inclusive production of light mesons ($\pi^0$, $\eta$, $\pi^{\pm}$, $K^{\pm}$
) at the Tevatron is considered in QCD to next-to-leading order in the
formalism of fragmentation functions. We present various distributions of
phenomenological interest, along with a new set of $K$ mesons fragmentation
functions.
|
[
{
"created": "Mon, 19 Sep 1994 22:26:57 GMT",
"version": "v1"
}
] |
2009-10-28
|
[
[
"Greco",
"Mario",
""
],
[
"Rolli",
"Simona",
""
]
] |
Inclusive production of light mesons ($\pi^0$, $\eta$, $\pi^{\pm}$, $K^{\pm}$ ) at the Tevatron is considered in QCD to next-to-leading order in the formalism of fragmentation functions. We present various distributions of phenomenological interest, along with a new set of $K$ mesons fragmentation functions.
|
1004.3673
|
Alexey Yushkov V.
|
A. Yushkov, M. Ambrosio, C. Aramo, F. Guarino, D. D'Urso, L. Valore
|
Precise determination of muon and electromagnetic shower contents from
shower universality property
|
Submitted to Phys. Rev. D
|
Phys.Rev.D81:123004,2010
|
10.1103/PhysRevD.81.123004
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider two new aspects of Extensive Air Shower development universality
allowing to make accurate estimation of muon and electromagnetic (EM) shower
contents in two independent ways. In the first case, to get muon (or EM) signal
in water Cherenkov tanks or in scintillator detectors it is enough to know the
vertical depth of shower maximum and the total signal in the ground detector.
In the second case, the EM signal can be calculated from the primary particle
energy and the zenith angle. In both cases the parametrizations of muon and EM
signals are almost independent on primary particle nature, energy and zenith
angle. Implications of the considered properties for mass composition and
hadronic interaction studies are briefly discussed. The present study is
performed on 28000 of proton, oxygen and iron showers, generated with CORSIKA
6.735 for $E^{-1}$ spectrum in the energy range log(E/eV)=18.5-20.0 and
uniformly distributed in cos^2(theta) in zenith angle interval theta=0-65
degrees for QGSJET II/Fluka interaction models.
|
[
{
"created": "Wed, 21 Apr 2010 10:46:14 GMT",
"version": "v1"
}
] |
2011-07-27
|
[
[
"Yushkov",
"A.",
""
],
[
"Ambrosio",
"M.",
""
],
[
"Aramo",
"C.",
""
],
[
"Guarino",
"F.",
""
],
[
"D'Urso",
"D.",
""
],
[
"Valore",
"L.",
""
]
] |
We consider two new aspects of Extensive Air Shower development universality allowing to make accurate estimation of muon and electromagnetic (EM) shower contents in two independent ways. In the first case, to get muon (or EM) signal in water Cherenkov tanks or in scintillator detectors it is enough to know the vertical depth of shower maximum and the total signal in the ground detector. In the second case, the EM signal can be calculated from the primary particle energy and the zenith angle. In both cases the parametrizations of muon and EM signals are almost independent on primary particle nature, energy and zenith angle. Implications of the considered properties for mass composition and hadronic interaction studies are briefly discussed. The present study is performed on 28000 of proton, oxygen and iron showers, generated with CORSIKA 6.735 for $E^{-1}$ spectrum in the energy range log(E/eV)=18.5-20.0 and uniformly distributed in cos^2(theta) in zenith angle interval theta=0-65 degrees for QGSJET II/Fluka interaction models.
|
1512.06687
|
Yuta Orikasa
|
Hiroshi Okada and Yuta Orikasa
|
Radiative Neutrino Model with Inert Triplet Scalar
|
21 pages, 3 figures, 3 tables, references added. Accepted version for
publication in Physical Review D, discussion of mu-e conversion is added and
the part of relic density are modified. arXiv admin note: text overlap with
arXiv:1509.04068
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study a one-loop induced radiative neutrino model with an inert isospin
triplet scalar field, in which we discuss current neutrino oscillation data,
lepton flavor violations, muon anomalous magnetic moment, and a dark matter
candidate. We show global analysis combining all the constraints, and briefly
mention another possibility.
|
[
{
"created": "Mon, 21 Dec 2015 16:38:43 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jan 2016 14:29:28 GMT",
"version": "v2"
},
{
"created": "Wed, 18 May 2016 14:39:58 GMT",
"version": "v3"
},
{
"created": "Tue, 16 Aug 2016 05:39:36 GMT",
"version": "v4"
}
] |
2016-09-30
|
[
[
"Okada",
"Hiroshi",
""
],
[
"Orikasa",
"Yuta",
""
]
] |
We study a one-loop induced radiative neutrino model with an inert isospin triplet scalar field, in which we discuss current neutrino oscillation data, lepton flavor violations, muon anomalous magnetic moment, and a dark matter candidate. We show global analysis combining all the constraints, and briefly mention another possibility.
|
1304.7940
|
Sergey Godunov
|
S. I. Godunov, M. I. Vysotsky
|
The dependence of the atomic energy levels on a superstrong magnetic
field with account of a finite nucleus radius and mass
|
21 pages, 4 figures
| null |
10.1103/PhysRevD.87.124035
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The influence of the finiteness of the proton radius and mass on the energies
of a hydrogen atom and hydrogen-like ions in a superstrong magnetic field is
studied. The finiteness of the nucleus size pushes the ground energy level up
leading to a nontrivial dependence of the value of critical nucleus charge on
the external magnetic field.
|
[
{
"created": "Tue, 30 Apr 2013 10:05:23 GMT",
"version": "v1"
}
] |
2015-06-15
|
[
[
"Godunov",
"S. I.",
""
],
[
"Vysotsky",
"M. I.",
""
]
] |
The influence of the finiteness of the proton radius and mass on the energies of a hydrogen atom and hydrogen-like ions in a superstrong magnetic field is studied. The finiteness of the nucleus size pushes the ground energy level up leading to a nontrivial dependence of the value of critical nucleus charge on the external magnetic field.
|
hep-ph/0307201
|
Olivier Leitner
|
X.-H. Guo (CSSM), O. Leitner (CSSM, LPC), A.W. Thomas (CSSM)
|
QCD Factorization in $B$ Decays into $\rho \pi$
|
11 pages, 9 figures. Talk presented at Fourth Tropical Workshop,
Cairns, Australia, 9--13 June 2003. Proceedings to be published by AIP
|
AIP Conf.Proc.689:126-136,2003
|
10.1063/1.1627732
|
ADP-03-124/T561, PCCF-RI-03-308
|
hep-ph
| null |
Based on the QCD factorization approach we analyse the branching ratios for
the channel $B \to \rho \pi$. From the comparisons with experimental data
provided by CLEO, BELLE and BABAR we constrain the form factor $F^{B \to
\pi}(m_{\rho}^{2})$ and propose boundaries for this form factor depending on
the CKM matrix element parameters $\rho$ and $\eta$.
|
[
{
"created": "Wed, 16 Jul 2003 11:55:24 GMT",
"version": "v1"
}
] |
2010-02-17
|
[
[
"Guo",
"X. -H.",
"",
"CSSM"
],
[
"Leitner",
"O.",
"",
"CSSM, LPC"
],
[
"Thomas",
"A. W.",
"",
"CSSM"
]
] |
Based on the QCD factorization approach we analyse the branching ratios for the channel $B \to \rho \pi$. From the comparisons with experimental data provided by CLEO, BELLE and BABAR we constrain the form factor $F^{B \to \pi}(m_{\rho}^{2})$ and propose boundaries for this form factor depending on the CKM matrix element parameters $\rho$ and $\eta$.
|
hep-ph/9906246
|
Martin Hecht
|
M.B. Hecht and B.H.J. McKellar
|
Off Mass Shell Effects in Hadron Electric Dipole Moments
|
21 pages, 1 figure, Revtex, uses psfig
|
Phys.Rev. C60 (1999) 065202
|
10.1103/PhysRevC.60.065202
|
UM-P-98/56, RCHEP-98/15
|
hep-ph nucl-th
| null |
We note that off the quark mass shell the operators $(p_i+p_f)_\mu\gamma_5$
and $i\sigma_{\mu\nu}(p_i -p_f)^\nu\gamma_5$, both of which reduce to
$-\vec{\sigma}\cdot\vec{E}$ in the non-relativistic limit, are no longer
identical. In this paper we explore the effects of this difference in the
contribution of these quark electric moments to hadronic electric moments.
|
[
{
"created": "Fri, 4 Jun 1999 04:25:19 GMT",
"version": "v1"
}
] |
2009-10-31
|
[
[
"Hecht",
"M. B.",
""
],
[
"McKellar",
"B. H. J.",
""
]
] |
We note that off the quark mass shell the operators $(p_i+p_f)_\mu\gamma_5$ and $i\sigma_{\mu\nu}(p_i -p_f)^\nu\gamma_5$, both of which reduce to $-\vec{\sigma}\cdot\vec{E}$ in the non-relativistic limit, are no longer identical. In this paper we explore the effects of this difference in the contribution of these quark electric moments to hadronic electric moments.
|
1704.07048
|
Sabyasachi Chakraborty
|
Sabyasachi Chakraborty, Saurabh Niyogi, K. Sridhar
|
Constraining compressed versions of MUED and MSSM using soft tracks at
the LHC
|
26 pages, 7 figures. Minor modifications in the text, references
added, accepted for publication in JHEP
| null |
10.1007/JHEP07(2017)105
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A compressed spectrum is an anticipated hideout for many beyond standard
model scenarios. Such a spectrum naturally arises in the minimal universal
extra dimension framework and also in supersymmetric scenarios. Low $p_T$
leptons and jets are characteristic features of such situations. Hence, a
monojet with $\not E_T$ has been the conventional signal at the Large Hadron
Collider (LHC). However, we stress that inclusion of $p_T$-binned track
observables from such soft objects provide very efficient discrimination of new
physics signals against various SM backgrounds. We consider two benchmark
points each for minimal universal extra dimension (MUED) and minimal
supersymmetric standard model (MSSM) scenarios. We perform a detailed cut-based
and multivariate analysis (MVA) to show that the new physics parameter space
can be probed in the ongoing run of LHC at 13 TeV center-of-mass energy with an
integrated luminosity $\sim$ 20-50 fb$^{-1}$. When studied in conjunction with
the dark matter relic density constraint assuming standard cosmology, we find
that compressed MUED (with $\Lambda R=2$) can be already excluded from the
existing data. Also, MVA turns out to be a better technique than regular
cut-based analysis since tracks provide uncorrelated observables which would
extract more information from an event.
|
[
{
"created": "Mon, 24 Apr 2017 05:54:26 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jul 2017 16:28:11 GMT",
"version": "v2"
}
] |
2017-09-13
|
[
[
"Chakraborty",
"Sabyasachi",
""
],
[
"Niyogi",
"Saurabh",
""
],
[
"Sridhar",
"K.",
""
]
] |
A compressed spectrum is an anticipated hideout for many beyond standard model scenarios. Such a spectrum naturally arises in the minimal universal extra dimension framework and also in supersymmetric scenarios. Low $p_T$ leptons and jets are characteristic features of such situations. Hence, a monojet with $\not E_T$ has been the conventional signal at the Large Hadron Collider (LHC). However, we stress that inclusion of $p_T$-binned track observables from such soft objects provide very efficient discrimination of new physics signals against various SM backgrounds. We consider two benchmark points each for minimal universal extra dimension (MUED) and minimal supersymmetric standard model (MSSM) scenarios. We perform a detailed cut-based and multivariate analysis (MVA) to show that the new physics parameter space can be probed in the ongoing run of LHC at 13 TeV center-of-mass energy with an integrated luminosity $\sim$ 20-50 fb$^{-1}$. When studied in conjunction with the dark matter relic density constraint assuming standard cosmology, we find that compressed MUED (with $\Lambda R=2$) can be already excluded from the existing data. Also, MVA turns out to be a better technique than regular cut-based analysis since tracks provide uncorrelated observables which would extract more information from an event.
|
2303.11747
|
Harsh Shah
|
Leif L\"onnblad and Harsh Shah
|
A spatially constrained QCD colour reconnection in pp, pA, and AA
collisions in the PYTHIA8/Angantyr model
|
26 pages, 20 figures, Updated in accordance with the journal version
of the article
|
EPJC 2023
|
10.1140/epjc/s10052-023-11778-3
|
LU-TP 23-04, MCNET-23-06
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present an updated version of the QCD-based colour reconnection model in
PYTHIA8, where we constrain the range in impact parameter for which
reconnections are allowed. In this way, we can introduce more realistic colour
reconnections in the Angantyr model for heavy ion collisions, where previously
only reconnections within separate nucleon sub-collisions have been allowed. We
investigate how the new impact parameter constraint influences final states in
pp collisions, and retune parameters of the multi-parton interaction parameters
in PYTHIA to compensate so that minimum bias data are reproduced. We also study
multiplicity distributions in pA collisions and find that, in order to
counteract the loss in multiplicity due to the introduction of global colour
reconnections, we need to modify some parameters in the Angantyr model while
keeping the parameters tuned to pp fixed. With Angantyr we can then extrapolate
to AA collisions without further parameter tuning and retaining a reasonable
description of the basic multiplicity distributions.
|
[
{
"created": "Tue, 21 Mar 2023 11:13:40 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Jul 2023 13:42:57 GMT",
"version": "v2"
}
] |
2023-09-20
|
[
[
"Lönnblad",
"Leif",
""
],
[
"Shah",
"Harsh",
""
]
] |
We present an updated version of the QCD-based colour reconnection model in PYTHIA8, where we constrain the range in impact parameter for which reconnections are allowed. In this way, we can introduce more realistic colour reconnections in the Angantyr model for heavy ion collisions, where previously only reconnections within separate nucleon sub-collisions have been allowed. We investigate how the new impact parameter constraint influences final states in pp collisions, and retune parameters of the multi-parton interaction parameters in PYTHIA to compensate so that minimum bias data are reproduced. We also study multiplicity distributions in pA collisions and find that, in order to counteract the loss in multiplicity due to the introduction of global colour reconnections, we need to modify some parameters in the Angantyr model while keeping the parameters tuned to pp fixed. With Angantyr we can then extrapolate to AA collisions without further parameter tuning and retaining a reasonable description of the basic multiplicity distributions.
|
2202.01785
|
Raymond Co
|
Raymond T. Co, Keisuke Harigaya, and Aaron Pierce
|
Cosmic Perturbations from a Rotating Field
|
39 pages + references, 4 figures
| null |
10.1088/1475-7516/2022/10/037
|
UMN-TH-4113/22, FTPI-MINN-22-04, CERN-TH-2022-007, LCTP-22-02
|
hep-ph astro-ph.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Complex scalar fields charged under approximate $U(1)$ symmetries appear in
well-motivated extensions of the Standard Model. One example is the field that
contains the QCD axion field associated with the Peccei-Quinn symmetry; others
include flat directions in supersymmetric theories with baryon, lepton, or
flavor charges. These fields may take on large values and rotate in field space
in the early universe. The relevant approximate $U(1)$ symmetry ensures that
the angular direction of the complex field is light during inflation and that
the rotation is thermodynamically stable and is long-lived. These properties
allow rotating complex scalar fields to naturally serve as curvatons and
explain the observed perturbations of the universe. The scenario imprints
non-Gaussianity in the curvature perturbations, likely at a level detectable in
future large scale structure observations. The rotation can also explain the
baryon asymmetry of the universe without producing excessive isocurvature
perturbations.
|
[
{
"created": "Thu, 3 Feb 2022 19:00:00 GMT",
"version": "v1"
}
] |
2022-10-26
|
[
[
"Co",
"Raymond T.",
""
],
[
"Harigaya",
"Keisuke",
""
],
[
"Pierce",
"Aaron",
""
]
] |
Complex scalar fields charged under approximate $U(1)$ symmetries appear in well-motivated extensions of the Standard Model. One example is the field that contains the QCD axion field associated with the Peccei-Quinn symmetry; others include flat directions in supersymmetric theories with baryon, lepton, or flavor charges. These fields may take on large values and rotate in field space in the early universe. The relevant approximate $U(1)$ symmetry ensures that the angular direction of the complex field is light during inflation and that the rotation is thermodynamically stable and is long-lived. These properties allow rotating complex scalar fields to naturally serve as curvatons and explain the observed perturbations of the universe. The scenario imprints non-Gaussianity in the curvature perturbations, likely at a level detectable in future large scale structure observations. The rotation can also explain the baryon asymmetry of the universe without producing excessive isocurvature perturbations.
|
2309.15146
|
Sarunas Verner
|
Kunio Kaneta, Wenqi Ke, Yann Mambrini, Keith A. Olive, Sarunas Verner
|
Gravitational Production of Spin-3/2 Particles During Reheating
|
21 pages, 7 figures
| null | null |
UMN--TH--4225/23, FTPI--MINN--23/17, OU--HET--1204
|
hep-ph astro-ph.CO hep-th
|
http://creativecommons.org/licenses/by/4.0/
|
We compute the density of a spin-$\frac32$ particle, the raritron, produced
at the end of inflation due to gravitational interactions. We consider a
background inflaton condensate as the source of this production, mediated by
the exchange of a graviton. This production greatly exceeds the gravitational
production from the emergent thermal bath during reheating. The relic abundance
limit sets an absolute minimum mass for a stable raritron, though there are
also model dependent constraints imposed by unitarity. We also examine the case
of gravitational production of a gravitino, taking into account the goldstino
evolution during reheating. We compare these results with conventional
gravitino production mechanisms.
|
[
{
"created": "Tue, 26 Sep 2023 18:00:01 GMT",
"version": "v1"
}
] |
2023-09-28
|
[
[
"Kaneta",
"Kunio",
""
],
[
"Ke",
"Wenqi",
""
],
[
"Mambrini",
"Yann",
""
],
[
"Olive",
"Keith A.",
""
],
[
"Verner",
"Sarunas",
""
]
] |
We compute the density of a spin-$\frac32$ particle, the raritron, produced at the end of inflation due to gravitational interactions. We consider a background inflaton condensate as the source of this production, mediated by the exchange of a graviton. This production greatly exceeds the gravitational production from the emergent thermal bath during reheating. The relic abundance limit sets an absolute minimum mass for a stable raritron, though there are also model dependent constraints imposed by unitarity. We also examine the case of gravitational production of a gravitino, taking into account the goldstino evolution during reheating. We compare these results with conventional gravitino production mechanisms.
|
1107.1414
|
Roberto Auzzi
|
Roberto Auzzi, Amit Giveon, Sven Bjarke Gudnason and Tomer Shacham
|
On the Spectrum of Direct Gaugino Mediation
|
21 pages, 4 figures; V2: refs. added
|
JHEP 1109:108,2011
|
10.1007/JHEP09(2011)108
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In direct gauge mediation, the gaugino masses are anomalously small, giving
rise to a split SUSY spectrum. Here we investigate the superpartner spectrum in
a minimal version of "direct gaugino mediation." We find that the sfermion
masses are comparable to those of the gauginos - even in the hybrid
gaugino-gauge mediation regime - if the messenger scale is sufficiently small.
|
[
{
"created": "Thu, 7 Jul 2011 14:55:31 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Sep 2011 21:22:30 GMT",
"version": "v2"
}
] |
2015-03-19
|
[
[
"Auzzi",
"Roberto",
""
],
[
"Giveon",
"Amit",
""
],
[
"Gudnason",
"Sven Bjarke",
""
],
[
"Shacham",
"Tomer",
""
]
] |
In direct gauge mediation, the gaugino masses are anomalously small, giving rise to a split SUSY spectrum. Here we investigate the superpartner spectrum in a minimal version of "direct gaugino mediation." We find that the sfermion masses are comparable to those of the gauginos - even in the hybrid gaugino-gauge mediation regime - if the messenger scale is sufficiently small.
|
hep-ph/9506216
|
Evan Reidell
|
Xiangdong Ji (MIT)
|
WILSON'S EXPANSION WITH POWER ACCURACY
|
8 pages in REVTEX
| null | null |
MIT-CTP-2437
|
hep-ph hep-lat hep-th
| null |
Because of the infrared renormalons, it is difficult to get power accuracy in
the traditional approach to the Wilson's operator product expansion. Based on a
new perturbative renormalization scheme for power-divergent operators, I
propose a practical version of the OPE that allows to calculate power
corrections to desired accuracy. The method is applied to the expansion of the
vector-current correlation function in QCD vacuum, in which field theoretical
status of the gluon condensate is discussed.
|
[
{
"created": "Thu, 1 Jun 1995 19:29:32 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Ji",
"Xiangdong",
"",
"MIT"
]
] |
Because of the infrared renormalons, it is difficult to get power accuracy in the traditional approach to the Wilson's operator product expansion. Based on a new perturbative renormalization scheme for power-divergent operators, I propose a practical version of the OPE that allows to calculate power corrections to desired accuracy. The method is applied to the expansion of the vector-current correlation function in QCD vacuum, in which field theoretical status of the gluon condensate is discussed.
|
1802.07999
|
Kirill Semenov-Tian-Shansky
|
M.A. Matveev, A.V. Sarantsev, K.M. Semenov-Tian-Shansky, A.N. Semenova
|
Differential technique for the covariant orbital angular momentum
operators
|
14 pages
| null |
10.1140/epja/i2018-12539-9
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The orbital angular momentum operator expansion turns to be a powerful tool
to construct the fully covariant partial wave amplitudes of hadron decay
reactions and hadron photo- and electroproduction processes. In this paper we
consider a useful development of the orbital angular momentum operator
expansion method. We present the differential technique allowing the direct
calculation of convolutions of two orbital angular momentum operators with an
arbitrary number of open Lorentz indices. This differential technique greatly
simplifies calculations when the reaction subject to the partial wave analysis
involves high spin particles in the initial and/or final states. We also
present a useful generalization of the orbital angular momentum operators.
|
[
{
"created": "Thu, 22 Feb 2018 11:58:25 GMT",
"version": "v1"
}
] |
2018-08-01
|
[
[
"Matveev",
"M. A.",
""
],
[
"Sarantsev",
"A. V.",
""
],
[
"Semenov-Tian-Shansky",
"K. M.",
""
],
[
"Semenova",
"A. N.",
""
]
] |
The orbital angular momentum operator expansion turns to be a powerful tool to construct the fully covariant partial wave amplitudes of hadron decay reactions and hadron photo- and electroproduction processes. In this paper we consider a useful development of the orbital angular momentum operator expansion method. We present the differential technique allowing the direct calculation of convolutions of two orbital angular momentum operators with an arbitrary number of open Lorentz indices. This differential technique greatly simplifies calculations when the reaction subject to the partial wave analysis involves high spin particles in the initial and/or final states. We also present a useful generalization of the orbital angular momentum operators.
|
2301.08128
|
Erik Buhmann
|
Erik Buhmann, Gregor Kasieczka, Jesse Thaler
|
EPiC-GAN: Equivariant Point Cloud Generation for Particle Jets
|
18 pages, 8 figures, 3 tables, code available at:
https://github.com/uhh-pd-ml/EPiC-GAN
|
SciPost Phys. 15, 130 (2023)
|
10.21468/SciPostPhys.15.4.130
|
MIT-CTP 5519
|
hep-ph cs.LG hep-ex physics.data-an
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
With the vast data-collecting capabilities of current and future high-energy
collider experiments, there is an increasing demand for computationally
efficient simulations. Generative machine learning models enable fast event
generation, yet so far these approaches are largely constrained to fixed data
structures and rigid detector geometries. In this paper, we introduce EPiC-GAN
- equivariant point cloud generative adversarial network - which can produce
point clouds of variable multiplicity. This flexible framework is based on deep
sets and is well suited for simulating sprays of particles called jets. The
generator and discriminator utilize multiple EPiC layers with an interpretable
global latent vector. Crucially, the EPiC layers do not rely on pairwise
information sharing between particles, which leads to a significant speed-up
over graph- and transformer-based approaches with more complex relation
diagrams. We demonstrate that EPiC-GAN scales well to large particle
multiplicities and achieves high generation fidelity on benchmark jet
generation tasks.
|
[
{
"created": "Tue, 17 Jan 2023 19:00:00 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Feb 2023 14:27:36 GMT",
"version": "v2"
},
{
"created": "Wed, 12 Jul 2023 21:04:29 GMT",
"version": "v3"
}
] |
2023-10-04
|
[
[
"Buhmann",
"Erik",
""
],
[
"Kasieczka",
"Gregor",
""
],
[
"Thaler",
"Jesse",
""
]
] |
With the vast data-collecting capabilities of current and future high-energy collider experiments, there is an increasing demand for computationally efficient simulations. Generative machine learning models enable fast event generation, yet so far these approaches are largely constrained to fixed data structures and rigid detector geometries. In this paper, we introduce EPiC-GAN - equivariant point cloud generative adversarial network - which can produce point clouds of variable multiplicity. This flexible framework is based on deep sets and is well suited for simulating sprays of particles called jets. The generator and discriminator utilize multiple EPiC layers with an interpretable global latent vector. Crucially, the EPiC layers do not rely on pairwise information sharing between particles, which leads to a significant speed-up over graph- and transformer-based approaches with more complex relation diagrams. We demonstrate that EPiC-GAN scales well to large particle multiplicities and achieves high generation fidelity on benchmark jet generation tasks.
|
0803.1449
|
Joerg Jaeckel
|
S. A. Abel, M. D. Goodsell, J. Jaeckel, V. V. Khoze and A. Ringwald
|
Kinetic Mixing of the Photon with Hidden U(1)s in String Phenomenology
|
35 pages, 5 figures
|
JHEP 0807:124,2008
|
10.1088/1126-6708/2008/07/124
|
IPPP/08/14; DESY 08-026
|
hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Embeddings of the standard model in type II string theory typically contain a
variety of U(1) gauge factors arising from D-branes in the bulk. In general,
there is no reason why only one of these - the one corresponding to weak
hypercharge - should be massless. Observations require that standard model
particles must be neutral (or have an extremely small charge) under additional
massless U(1)s, i.e. the latter have to belong to a so called hidden sector.
The exchange of heavy messengers, however, can lead to a kinetic mixing between
the hypercharge and the hidden-sector U(1)s, that is testable with near future
experiments. This provides a powerful probe of the hidden sectors and, as a
consequence, of the string theory realisation itself. In the present paper, we
show, using a variety of methods, how the kinetic mixing can be derived from
the underlying type II string compactification, involving supersymmetric and
nonsupersymmetric configurations of D-branes, both in large volumes and in
warped backgrounds with fluxes. We first demonstrate by explicit example that
kinetic mixing occurs in a completely supersymmetric set-up where we can use
conformal field theory techniques. We then develop a supergravity approach
which allows us to examine the phenomenon in more general backgrounds, where we
find that kinetic mixing is natural in the context of flux compactifications.
We discuss the phenomenological consequences for experiments at the low-energy
frontier, searching for signatures of light, sub-electronvolt or even massless
hidden-sector U(1) gauge bosons and minicharged particles.
|
[
{
"created": "Mon, 10 Mar 2008 16:28:27 GMT",
"version": "v1"
}
] |
2011-07-18
|
[
[
"Abel",
"S. A.",
""
],
[
"Goodsell",
"M. D.",
""
],
[
"Jaeckel",
"J.",
""
],
[
"Khoze",
"V. V.",
""
],
[
"Ringwald",
"A.",
""
]
] |
Embeddings of the standard model in type II string theory typically contain a variety of U(1) gauge factors arising from D-branes in the bulk. In general, there is no reason why only one of these - the one corresponding to weak hypercharge - should be massless. Observations require that standard model particles must be neutral (or have an extremely small charge) under additional massless U(1)s, i.e. the latter have to belong to a so called hidden sector. The exchange of heavy messengers, however, can lead to a kinetic mixing between the hypercharge and the hidden-sector U(1)s, that is testable with near future experiments. This provides a powerful probe of the hidden sectors and, as a consequence, of the string theory realisation itself. In the present paper, we show, using a variety of methods, how the kinetic mixing can be derived from the underlying type II string compactification, involving supersymmetric and nonsupersymmetric configurations of D-branes, both in large volumes and in warped backgrounds with fluxes. We first demonstrate by explicit example that kinetic mixing occurs in a completely supersymmetric set-up where we can use conformal field theory techniques. We then develop a supergravity approach which allows us to examine the phenomenon in more general backgrounds, where we find that kinetic mixing is natural in the context of flux compactifications. We discuss the phenomenological consequences for experiments at the low-energy frontier, searching for signatures of light, sub-electronvolt or even massless hidden-sector U(1) gauge bosons and minicharged particles.
|
1810.12242
|
Jose Antonio Oller
|
J. A. Oller, D. R. Entem
|
The exact discontinuity of a partial wave along the left-hand cut and
the exact $N/D$ method in non-relativistic scattering
|
103 pages, 21 figures
| null |
10.1016/j.aop.2019.167965
| null |
hep-ph cond-mat.quant-gas hep-th nucl-th quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We first deduce the analytical continuation in the complex planes of the
initial and final three-momenta of the Lippmann-Schwinger equation in coupled
or uncoupled partial-wave amplitudes. This result allows us to deduce a master
equation whose solution is the exact discontinuity of the on-shell partial-wave
amplitudes along the left-hand cut. This equation is always a linear
non-singular integral equation whose solution is fixed exclusively by the
knowledge of the potential, applicable to either regular or singular
potentials. The capability of calculating exactly this discontinuity allows one
to settle the exact $N/D $ method in two-body non-relativistic scattering for
coupled and uncoupled waves. We exemplify this new advance in scattering theory
by explicitly checking the agreement between the Lippmann-Schwinger equation
with the corresponding solutions of the exact $N/D$ method for some examples
that involve regular and singular potentials, either attractive or repulsive.
|
[
{
"created": "Mon, 29 Oct 2018 16:40:53 GMT",
"version": "v1"
}
] |
2020-01-08
|
[
[
"Oller",
"J. A.",
""
],
[
"Entem",
"D. R.",
""
]
] |
We first deduce the analytical continuation in the complex planes of the initial and final three-momenta of the Lippmann-Schwinger equation in coupled or uncoupled partial-wave amplitudes. This result allows us to deduce a master equation whose solution is the exact discontinuity of the on-shell partial-wave amplitudes along the left-hand cut. This equation is always a linear non-singular integral equation whose solution is fixed exclusively by the knowledge of the potential, applicable to either regular or singular potentials. The capability of calculating exactly this discontinuity allows one to settle the exact $N/D $ method in two-body non-relativistic scattering for coupled and uncoupled waves. We exemplify this new advance in scattering theory by explicitly checking the agreement between the Lippmann-Schwinger equation with the corresponding solutions of the exact $N/D$ method for some examples that involve regular and singular potentials, either attractive or repulsive.
|
0710.5391
|
Jean-Rene Cudell
|
J.R. Cudell, A. Lengyel, E. Martynov, O.V. Selyugin
|
The soft and the hard pomerons: elastic scattering and unitarisation
|
Talk given at 12th International Conference on Elastic and
Diffractive Scattering: Forward Physics and QCD, Hamburg, DESY, Germany,
21-25 May 2007
| null | null | null |
hep-ph
| null |
The hard pomeron component needed to reproduce small-x data seems to be
present in elastic scattering at moderate energy. If this is the case, it is
likely that the total cross section at the LHC will be appreciably larger than
previously expected.
|
[
{
"created": "Mon, 29 Oct 2007 11:36:12 GMT",
"version": "v1"
}
] |
2007-10-30
|
[
[
"Cudell",
"J. R.",
""
],
[
"Lengyel",
"A.",
""
],
[
"Martynov",
"E.",
""
],
[
"Selyugin",
"O. V.",
""
]
] |
The hard pomeron component needed to reproduce small-x data seems to be present in elastic scattering at moderate energy. If this is the case, it is likely that the total cross section at the LHC will be appreciably larger than previously expected.
|
1101.4816
|
Timothy Burns
|
T. J. Burns
|
Rethinking the X(3872)
|
3 pages. Contribution to the proceedings of "Quark Confinement and
the Hadron Spectrum IX", Universidad Complutense de Madrid, 30 August--3
September 2010
| null |
10.1063/1.3575041
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The BaBar analysis which favours $2^{-+}$ quantum numbers for the X(3872)
implies that it may be none other than the 1D2 charmonia state. In that case
the isospin breaking in closed flavour modes may be the result of re-scattering
from open flavour. However, the observed production cross section in
proton-antiproton collisions is much larger than expectations, while the mass
of the state, compared to the predictions of a string model, is too high. The
1D2 assignment would imply a 3D2 partner nearby in mass, which may be the
X(3875). In the tetraquark interpretation the $2^{-+}$ assignment implies a
rich spectrum of partner states, although the X(3872) may be among the few
which are narrow enough to be observable. This talk is based in part on "The
2-+ assignment for the X(3872)" by T. J. Burns, F. Piccinini, A. D. Polosa & C.
Sabelli (Phys. Rev. D 82, 074003 (2010); arXiv:1008.0018 [hep-ph]).
|
[
{
"created": "Tue, 25 Jan 2011 14:03:13 GMT",
"version": "v1"
}
] |
2015-05-27
|
[
[
"Burns",
"T. J.",
""
]
] |
The BaBar analysis which favours $2^{-+}$ quantum numbers for the X(3872) implies that it may be none other than the 1D2 charmonia state. In that case the isospin breaking in closed flavour modes may be the result of re-scattering from open flavour. However, the observed production cross section in proton-antiproton collisions is much larger than expectations, while the mass of the state, compared to the predictions of a string model, is too high. The 1D2 assignment would imply a 3D2 partner nearby in mass, which may be the X(3875). In the tetraquark interpretation the $2^{-+}$ assignment implies a rich spectrum of partner states, although the X(3872) may be among the few which are narrow enough to be observable. This talk is based in part on "The 2-+ assignment for the X(3872)" by T. J. Burns, F. Piccinini, A. D. Polosa & C. Sabelli (Phys. Rev. D 82, 074003 (2010); arXiv:1008.0018 [hep-ph]).
|
hep-ph/9605434
|
Tommaso Calarco
|
V. Barone (Dipartimento di Fisica Teorica and INFN, Torino), T.
Calarco and A. Drago (Dipartimento di Fisica and INFN, Ferrara)
|
A confinement model calculation of h_1(x)
|
11 pages, 5 PostScript figures in an uuencoded file h1figures.uu
|
Phys.Lett. B390 (1997) 287-292
|
10.1016/S0370-2693(96)01397-4
|
DFTT 24/96
|
hep-ph
| null |
The transverse polarization distribution of quarks $h_1(x)$ is computed in a
confinement model, the chiral chromodielectric model. The flavor structure of
$h_1$, its $Q^2$ evolution and Soffer's inequality are studied. The Drell--Yan
double transverse asymmetry $A_{TT}$ is evaluated and found to be one order of
magnitude smaller than the double longitudinal asymmetry.
|
[
{
"created": "Thu, 30 May 1996 07:56:17 GMT",
"version": "v1"
}
] |
2009-10-28
|
[
[
"Barone",
"V.",
"",
"Dipartimento di Fisica Teorica and INFN, Torino"
],
[
"Calarco",
"T.",
"",
"Dipartimento di Fisica and INFN, Ferrara"
],
[
"Drago",
"A.",
"",
"Dipartimento di Fisica and INFN, Ferrara"
]
] |
The transverse polarization distribution of quarks $h_1(x)$ is computed in a confinement model, the chiral chromodielectric model. The flavor structure of $h_1$, its $Q^2$ evolution and Soffer's inequality are studied. The Drell--Yan double transverse asymmetry $A_{TT}$ is evaluated and found to be one order of magnitude smaller than the double longitudinal asymmetry.
|
0907.3285
|
Aqeel Ahmed
|
Fayyazuddin
|
CP-Violation in K, B and B_{s} decays
|
43 Pages, 7 Fegures
| null | null | null |
hep-ph
|
http://creativecommons.org/licenses/by/3.0/
|
In this review we give an overview of CP-violation for K, B and B_s systems.
Direct CP-violation and mixing induced CP-violation are discussed.
|
[
{
"created": "Sun, 19 Jul 2009 12:28:50 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Sep 2009 07:49:38 GMT",
"version": "v2"
}
] |
2009-09-28
|
[
[
"Fayyazuddin",
"",
""
]
] |
In this review we give an overview of CP-violation for K, B and B_s systems. Direct CP-violation and mixing induced CP-violation are discussed.
|
1907.13234
|
Francesco Moriello
|
Francesco Moriello
|
Generalised power series expansions for the elliptic planar families of
Higgs + jet production at two loops
|
38 pages, 6 figures, 2 tables. Comparison against pySecDec and timing
for subsectors included. One-loop example added. JHEP version
| null |
10.1007/JHEP01(2020)150
| null |
hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We obtain generalised power series expansions for a family of planar two-loop
master integrals relevant for the QCD corrections to Higgs + jet production,
with physical heavy-quark mass dependence. This is achieved by defining
differential equations along contours connecting two fixed points, and by
solving them in terms of one-dimensional generalised power series. The
procedure is efficient and can be repeated in order to reach any point of the
kinematic regions. The analytic continuation of the series is straightforward
and we present new results below and above the physical thresholds. The method
we use allows to compute the integrals in all kinematic regions with high
precision. Performing a series expansion on a typical contour above the
physical threshold takes on average $\mathcal{O}(1 \text{ second})$ per
integral with worst relative error of $\mathcal{O}(10^{-32})$, on a single CPU
core. After the series is found the numerical evaluation of the integrals in
any point of the contour is virtually instant. Our approach is general and can
be applied to Feynman integrals provided that a set of differential equations
is available.
|
[
{
"created": "Tue, 30 Jul 2019 21:34:16 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Aug 2019 12:01:51 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Jan 2020 13:24:00 GMT",
"version": "v3"
}
] |
2020-02-19
|
[
[
"Moriello",
"Francesco",
""
]
] |
We obtain generalised power series expansions for a family of planar two-loop master integrals relevant for the QCD corrections to Higgs + jet production, with physical heavy-quark mass dependence. This is achieved by defining differential equations along contours connecting two fixed points, and by solving them in terms of one-dimensional generalised power series. The procedure is efficient and can be repeated in order to reach any point of the kinematic regions. The analytic continuation of the series is straightforward and we present new results below and above the physical thresholds. The method we use allows to compute the integrals in all kinematic regions with high precision. Performing a series expansion on a typical contour above the physical threshold takes on average $\mathcal{O}(1 \text{ second})$ per integral with worst relative error of $\mathcal{O}(10^{-32})$, on a single CPU core. After the series is found the numerical evaluation of the integrals in any point of the contour is virtually instant. Our approach is general and can be applied to Feynman integrals provided that a set of differential equations is available.
|
1509.07551
|
Keith Pedersen
|
Keith Pedersen and Zack Sullivan
|
Flavor tagging TeV jets for BSM and QCD
|
Presentation at the DPF 2015 Meeting of the American Physical Society
Division of Particles and Fields, Ann Arbor, Michigan, August 4-8, 2015. 7
pages, 4 figures
| null | null |
IIT-CAPP-15-04
|
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present a new scheme for tagging high-$p_{T}$ bottom and charm jets using
energetic muons. Contemporary track-based $b$ tags lose their ability to reject
light jet background as jet $p_{T}\rightarrow\mathcal{O}(\mathrm{TeV})$, where
the massive boost exposes fundamental limits in tracking resolution. For our
"$\mu_{x}$" tag, the signal efficiency and light jet rejection is robust versus
$p_{T}$. In the tested regime (jet $p_{T}\in[\mathrm{0.5,2.1}]$ TeV), $\mu_{x}$
tags $\sim14\%$ of $b$ jets, $\sim6.5\%$ of $c$ jets and $\sim0.65\%$ of light
jets. Since $\mu_{x}$ tagging should be immediately useful in a searches for
heavy resonances, we test it with a typical dijet search --- a heavy,
leptophobic $Z^{\prime}$.
|
[
{
"created": "Thu, 24 Sep 2015 22:14:54 GMT",
"version": "v1"
}
] |
2015-09-28
|
[
[
"Pedersen",
"Keith",
""
],
[
"Sullivan",
"Zack",
""
]
] |
We present a new scheme for tagging high-$p_{T}$ bottom and charm jets using energetic muons. Contemporary track-based $b$ tags lose their ability to reject light jet background as jet $p_{T}\rightarrow\mathcal{O}(\mathrm{TeV})$, where the massive boost exposes fundamental limits in tracking resolution. For our "$\mu_{x}$" tag, the signal efficiency and light jet rejection is robust versus $p_{T}$. In the tested regime (jet $p_{T}\in[\mathrm{0.5,2.1}]$ TeV), $\mu_{x}$ tags $\sim14\%$ of $b$ jets, $\sim6.5\%$ of $c$ jets and $\sim0.65\%$ of light jets. Since $\mu_{x}$ tagging should be immediately useful in a searches for heavy resonances, we test it with a typical dijet search --- a heavy, leptophobic $Z^{\prime}$.
|
hep-ph/0306223
|
HoSeong La
|
HoSeong La
|
Implications of Local Chiral Symmetry Breaking
|
4 pages, revtex
| null | null | null |
hep-ph hep-th
| null |
The spontaneous symmetry breaking of a local chiral symmetry to its diagonal
vector symmetry naturally realizes a complete geometrical structure more
general than that of Yang-Mills (YM) theory, rather similar to that of gravity.
A good example is the Quantum Chromodynamics (QCD) with respect to the Chiral
Color model. Also, a new anomaly-free particle content for a Chiral Color model
is introduced: the Chiral Color can be realized without introducing whole new
generations of quarks and leptons, but by simply enlarging each generation with
new exotic fermions.
|
[
{
"created": "Mon, 23 Jun 2003 23:39:38 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"La",
"HoSeong",
""
]
] |
The spontaneous symmetry breaking of a local chiral symmetry to its diagonal vector symmetry naturally realizes a complete geometrical structure more general than that of Yang-Mills (YM) theory, rather similar to that of gravity. A good example is the Quantum Chromodynamics (QCD) with respect to the Chiral Color model. Also, a new anomaly-free particle content for a Chiral Color model is introduced: the Chiral Color can be realized without introducing whole new generations of quarks and leptons, but by simply enlarging each generation with new exotic fermions.
|
2011.08501
|
Xiang Liu
|
Jun-Zhang Wang, Dian-Yong Chen, Xiang Liu and Takayuki Matsuki
|
Mapping a new cluster of charmoniumlike structures at $e^+e^-$
collisions
|
6 pages, 1 table and 5 figures. Accepted by Phys. Lett. B
|
Phys.Lett.B 817, 136345 (2021)
|
10.1016/j.physletb.2021.136345
| null |
hep-ph
|
http://creativecommons.org/publicdomain/zero/1.0/
|
In this work, we find a Critical Energy induced Enhancement (CEE) mechanism
for the general three-body open-charm process at the $e^+e^-$ collisions, which
utilizes the peculiar kinematic behavior of the $e^+e^-$ annihilation process
involving three-body final states. We present a general analysis of a
three-body process $e^+e^-\to BC\to B(C\to DE)$. When the center-of-mass (CM)
energy of the $e^+e^-$ collision satisfies a critical relation
$\sqrt{s}=m_B+m_C$, there clearly exists the reflection peak of an intermediate
$C$ state near the threshold of the invariant mass distribution of $m_{BE}$ or
$m_{BD}$, whose formation is very sensitive to the CM energy. The reflection
enhancement phenomenon induced at the critical energy means that a new cluster
of charmoniumlike structures can be experimentally mapped. Taking an example of
$e^+e^-\to D_s^{*-}D_{s2}^*(2573)^+ \to D_s^{*-}(D^0K^+)$, we further
illustrate this novel phenomenon when $\sqrt{s}=4.680$ GeV. What is more
important is that a series of optimal CM energy points to search for new
charmoniumlike structures in three-body open-charm processes from $e^+e^-$
annihilation are suggested, which can be accessible at BESIII and further
BelleII as a new research topic.
|
[
{
"created": "Tue, 17 Nov 2020 08:33:47 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Nov 2020 02:13:22 GMT",
"version": "v2"
},
{
"created": "Tue, 4 May 2021 11:12:25 GMT",
"version": "v3"
}
] |
2021-05-11
|
[
[
"Wang",
"Jun-Zhang",
""
],
[
"Chen",
"Dian-Yong",
""
],
[
"Liu",
"Xiang",
""
],
[
"Matsuki",
"Takayuki",
""
]
] |
In this work, we find a Critical Energy induced Enhancement (CEE) mechanism for the general three-body open-charm process at the $e^+e^-$ collisions, which utilizes the peculiar kinematic behavior of the $e^+e^-$ annihilation process involving three-body final states. We present a general analysis of a three-body process $e^+e^-\to BC\to B(C\to DE)$. When the center-of-mass (CM) energy of the $e^+e^-$ collision satisfies a critical relation $\sqrt{s}=m_B+m_C$, there clearly exists the reflection peak of an intermediate $C$ state near the threshold of the invariant mass distribution of $m_{BE}$ or $m_{BD}$, whose formation is very sensitive to the CM energy. The reflection enhancement phenomenon induced at the critical energy means that a new cluster of charmoniumlike structures can be experimentally mapped. Taking an example of $e^+e^-\to D_s^{*-}D_{s2}^*(2573)^+ \to D_s^{*-}(D^0K^+)$, we further illustrate this novel phenomenon when $\sqrt{s}=4.680$ GeV. What is more important is that a series of optimal CM energy points to search for new charmoniumlike structures in three-body open-charm processes from $e^+e^-$ annihilation are suggested, which can be accessible at BESIII and further BelleII as a new research topic.
|
1906.10769
|
Pawe{\l} Koz\'ow
|
Geetanjali Chaudhary, Jan Kalinowski, Manjit Kaur, Pawe{\l} Koz\'ow,
Kaur Sandeep, Micha{\l} Szleper, S{\l}awomir Tkaczyk
|
EFT triangles in the same-sign $WW$ scattering process at the HL-LHC and
HE-LHC
|
21 pages, published version plus typo corrected in the
Acknowledgments
|
Eur. Phys. J. C 80, 181 (2020)
|
10.1140/epjc/s10052-020-7728-x
|
preprint VBSCAN-PUB-12-19
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the Beyond Standard Model discovery potential in the framework
of the Effective Field Theory (EFT) for the same-sign $WW$ scattering process
in purely leptonic $W$ decay modes at the High-Luminosity and High-Energy
phases of the Large Hadron Collider (LHC). The goal of this paper is to examine
the applicability of the EFT approach, with one dimension-8 operator varied at
a time, to describe a hypothetical new physics signal in the $WWWW$ quartic
coupling. In the considered process there is no experimental handle on the $WW$
invariant mass, and it has previously been shown that the discovery potential
at 14 TeV is rather slim. In this paper we report the results calculated for a
27 TeV machine and compare them with the discovery potential obtained at 14
TeV. We find that while the respective discovery regions shift to lower values
of the Wilson coefficients, the overall discovery potential of this procedure
does not get significantly larger with a higher beam energy.
|
[
{
"created": "Tue, 25 Jun 2019 22:14:36 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Oct 2019 14:58:28 GMT",
"version": "v2"
},
{
"created": "Fri, 20 Mar 2020 18:54:18 GMT",
"version": "v3"
}
] |
2020-03-24
|
[
[
"Chaudhary",
"Geetanjali",
""
],
[
"Kalinowski",
"Jan",
""
],
[
"Kaur",
"Manjit",
""
],
[
"Kozów",
"Paweł",
""
],
[
"Sandeep",
"Kaur",
""
],
[
"Szleper",
"Michał",
""
],
[
"Tkaczyk",
"Sławomir",
""
]
] |
We investigate the Beyond Standard Model discovery potential in the framework of the Effective Field Theory (EFT) for the same-sign $WW$ scattering process in purely leptonic $W$ decay modes at the High-Luminosity and High-Energy phases of the Large Hadron Collider (LHC). The goal of this paper is to examine the applicability of the EFT approach, with one dimension-8 operator varied at a time, to describe a hypothetical new physics signal in the $WWWW$ quartic coupling. In the considered process there is no experimental handle on the $WW$ invariant mass, and it has previously been shown that the discovery potential at 14 TeV is rather slim. In this paper we report the results calculated for a 27 TeV machine and compare them with the discovery potential obtained at 14 TeV. We find that while the respective discovery regions shift to lower values of the Wilson coefficients, the overall discovery potential of this procedure does not get significantly larger with a higher beam energy.
|
2207.07537
|
Lingyun Dai
|
Qi Zhou, Di Guo, Shi-Qing Kuang, Qin-He Yang and Ling-Yun Dai
|
Nature of the $X(6900)$ in partial wave decomposition of $J/\psi J/\psi$
scattering
|
6 pages, 4 figures. To be the same as the published version
| null |
10.1103/PhysRevD.106.L111502
| null |
hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this letter, we perform partial wave decomposition on coupled-channel
scattering amplitudes, $J/\psi J/\psi$-$J/\psi \psi(2S)$-$J/\psi \psi(3770)$,
to study the resonance appears in these processes. Effective Lagrangians are
used to describe the interactions of four charmed vector mesons, and the
scattering amplitudes are calculated up to the next-to-leading order. Partial
wave projections are performed, and unitarization is implemented by Pad\'e
approximation. Then we fit the amplitudes to the $J/\psi J/\psi$ invariant mass
spectra measured by LHCb and determine the unknown couplings. The pole
parameters of the $X(6900)$ are extracted as $M=6861.0^{+6.3}_{-8.8}$~MeV and
$\Gamma=129.0^{+5.6}_{-3.4}$~MeV. Our analysis implies that its quantum number
prefers to be $0^{++}$. The pole counting rule and phase shifts show that it is
a normal Breit-Wigner resonance and, hence, should be a compact tetraquark.
|
[
{
"created": "Fri, 15 Jul 2022 15:28:42 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Sep 2022 03:19:44 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Nov 2022 16:25:54 GMT",
"version": "v3"
},
{
"created": "Mon, 12 Dec 2022 12:44:27 GMT",
"version": "v4"
}
] |
2023-01-04
|
[
[
"Zhou",
"Qi",
""
],
[
"Guo",
"Di",
""
],
[
"Kuang",
"Shi-Qing",
""
],
[
"Yang",
"Qin-He",
""
],
[
"Dai",
"Ling-Yun",
""
]
] |
In this letter, we perform partial wave decomposition on coupled-channel scattering amplitudes, $J/\psi J/\psi$-$J/\psi \psi(2S)$-$J/\psi \psi(3770)$, to study the resonance appears in these processes. Effective Lagrangians are used to describe the interactions of four charmed vector mesons, and the scattering amplitudes are calculated up to the next-to-leading order. Partial wave projections are performed, and unitarization is implemented by Pad\'e approximation. Then we fit the amplitudes to the $J/\psi J/\psi$ invariant mass spectra measured by LHCb and determine the unknown couplings. The pole parameters of the $X(6900)$ are extracted as $M=6861.0^{+6.3}_{-8.8}$~MeV and $\Gamma=129.0^{+5.6}_{-3.4}$~MeV. Our analysis implies that its quantum number prefers to be $0^{++}$. The pole counting rule and phase shifts show that it is a normal Breit-Wigner resonance and, hence, should be a compact tetraquark.
|
1210.4705
|
Eduardo de Rafael
|
Eduardo de Rafael
|
Update of the Electron and Muon g-Factors
|
Talk given at the QCD-12 Conference in Montpellier
| null |
10.1016/j.nuclphysbps.2012.12.012
| null |
hep-ph hep-th nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
I give an overview of the different contributions to the electron and muon
anomalous magnetic moments in the Standard Model. Special emphasis is given to
recent QED results as well as to the hadronic light-by-light scattering
contribution to the muon anomaly.
|
[
{
"created": "Wed, 17 Oct 2012 11:55:59 GMT",
"version": "v1"
}
] |
2015-06-11
|
[
[
"de Rafael",
"Eduardo",
""
]
] |
I give an overview of the different contributions to the electron and muon anomalous magnetic moments in the Standard Model. Special emphasis is given to recent QED results as well as to the hadronic light-by-light scattering contribution to the muon anomaly.
|
1407.0130
|
Tomohiro Fujita
|
Tomohiro Fujita
|
Probing Beyond Standard Model via Hawking Radiated Gravitational Waves
|
6 pages, 3 figures
| null | null |
IPMU 14-0151
|
hep-ph astro-ph.CO gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a novel technique to probe the beyond standard model (BSM) of
particle physics. The mass spectrum of unknown BSM particles can be scanned by
observing gravitational waves (GWs) emitted by Hawking radiation of black
holes. This is because information on the radiation of the BSM particles is
imprinted in the spectrum of the GWs. We fully calculate the GW spectrum from
evaporating black holes taking into account the greybody factor. As an
observationally interesting application, we consider primordial black holes
which evaporate in the very early universe. In that case, since the frequencies
of GWs are substantially redshifted, the GWs emitted with the BSM energy scales
become accessible by observations.
|
[
{
"created": "Tue, 1 Jul 2014 08:00:40 GMT",
"version": "v1"
}
] |
2014-07-02
|
[
[
"Fujita",
"Tomohiro",
""
]
] |
We propose a novel technique to probe the beyond standard model (BSM) of particle physics. The mass spectrum of unknown BSM particles can be scanned by observing gravitational waves (GWs) emitted by Hawking radiation of black holes. This is because information on the radiation of the BSM particles is imprinted in the spectrum of the GWs. We fully calculate the GW spectrum from evaporating black holes taking into account the greybody factor. As an observationally interesting application, we consider primordial black holes which evaporate in the very early universe. In that case, since the frequencies of GWs are substantially redshifted, the GWs emitted with the BSM energy scales become accessible by observations.
|
1509.04604
|
Ramona Grober
|
Ramona Gr\"ober
|
Light Stop Decays
|
To appear in the proceedings of the 27th Rencontres the Blois on
Particle Physics and Cosmology, May 31 - June 05, 2015
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
If the stop is the next-to-lightest supersymmetric particle (NLSP) and the
mass difference to the neutralino is smaller than the top mass, it can decay
via flavour-violating decay modes to $c\tilde{\chi}^0_1/u\tilde{\chi}^0_1$ or a
four-body decay to $b\tilde{\chi}_1^0f\bar{f}'$, which above the $W$ boson
threshold corresponds to the decay to $b\tilde{\chi}_1^0W$. Improving on
existing calculations for these decay modes, we analyse the branching ratios
(BRs) for the respective decays and show that they can significantly deviate
from one.
|
[
{
"created": "Tue, 15 Sep 2015 15:33:35 GMT",
"version": "v1"
}
] |
2015-09-16
|
[
[
"Gröber",
"Ramona",
""
]
] |
If the stop is the next-to-lightest supersymmetric particle (NLSP) and the mass difference to the neutralino is smaller than the top mass, it can decay via flavour-violating decay modes to $c\tilde{\chi}^0_1/u\tilde{\chi}^0_1$ or a four-body decay to $b\tilde{\chi}_1^0f\bar{f}'$, which above the $W$ boson threshold corresponds to the decay to $b\tilde{\chi}_1^0W$. Improving on existing calculations for these decay modes, we analyse the branching ratios (BRs) for the respective decays and show that they can significantly deviate from one.
|
1606.07793
|
Tania Robens
|
Guillaume Chalons, David Lopez-Val, Tania Robens, Tim Stefaniak
|
The Higgs singlet extension at LHC Run 2
|
5 pages, 3 figures, Proceedings of the XXIV International Workshop on
Deep-Inelastic Scattering and Related Subjects
| null | null |
CP3-16-34, LPSC16110
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the current status of theoretical and experimental constraints on
the real Higgs singlet extension of the Standard Model. For the second neutral
(non-standard) Higgs boson the mass range up to 1 TeV accessible at past and
current collider experiments is considered. We furthermore discuss electroweak
corrections to the H to hh partial decay width within this model.
|
[
{
"created": "Fri, 24 Jun 2016 19:16:06 GMT",
"version": "v1"
}
] |
2016-06-27
|
[
[
"Chalons",
"Guillaume",
""
],
[
"Lopez-Val",
"David",
""
],
[
"Robens",
"Tania",
""
],
[
"Stefaniak",
"Tim",
""
]
] |
We discuss the current status of theoretical and experimental constraints on the real Higgs singlet extension of the Standard Model. For the second neutral (non-standard) Higgs boson the mass range up to 1 TeV accessible at past and current collider experiments is considered. We furthermore discuss electroweak corrections to the H to hh partial decay width within this model.
|
hep-ph/9211297
|
Patrick O'Donnell
|
Patrick J. O'Donnell
|
K and B Physics: a way beyond the Standard Model
|
18 pages, report UTPT-92-13
| null | null | null |
hep-ph
| null |
I review some aspects of $K$ and $B$ physics both in the context of the
standard model and in some cases in a scenario which is rather different from
the standard model. I discuss, in particular, where we are likely to see
deviations from the standard model in the near future before new colliders are
built.
|
[
{
"created": "Mon, 23 Nov 1992 22:04:02 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"O'Donnell",
"Patrick J.",
""
]
] |
I review some aspects of $K$ and $B$ physics both in the context of the standard model and in some cases in a scenario which is rather different from the standard model. I discuss, in particular, where we are likely to see deviations from the standard model in the near future before new colliders are built.
|
0708.0936
|
Fen Zuo
|
Tao Huang, Fen Zuo
|
Couplings of the Rho Meson in a Holographic dual of QCD with Regge
Trajectories
|
9 pages
|
Eur.Phys.J.C56:75-80,2008
|
10.1140/epjc/s10052-008-0642-2
| null |
hep-ph
| null |
The couplings $g_{\rho HH}$ of the $\rho$ meson with any hadron H are
calculated in a holographic dual of QCD where the Regge trajectories for mesons
are manifest. The resulting couplings grow linearly with the exciting number of
H, thus are far from universal. A simple argument has been given for this
behavior based on quasi-classical picture of excited hadrons. It seems that in
holographic duals with exact Regge trajectories the $g_{\rho HH}$ universality
should be violated. The $\rho$-dominance for the electromagnetic form factors
of H are also strongly violated, except for the lowest state, the pion. Quite
unexpected, the form factor of the pion is completely saturated by the
contribution of the $\rho$. The asymptotic behavior of the form factors are
also calculated, and are found to be perfectly accordant with the prediction of
conformal symmetry and pertubative QCD.
|
[
{
"created": "Tue, 7 Aug 2007 11:57:47 GMT",
"version": "v1"
}
] |
2008-11-26
|
[
[
"Huang",
"Tao",
""
],
[
"Zuo",
"Fen",
""
]
] |
The couplings $g_{\rho HH}$ of the $\rho$ meson with any hadron H are calculated in a holographic dual of QCD where the Regge trajectories for mesons are manifest. The resulting couplings grow linearly with the exciting number of H, thus are far from universal. A simple argument has been given for this behavior based on quasi-classical picture of excited hadrons. It seems that in holographic duals with exact Regge trajectories the $g_{\rho HH}$ universality should be violated. The $\rho$-dominance for the electromagnetic form factors of H are also strongly violated, except for the lowest state, the pion. Quite unexpected, the form factor of the pion is completely saturated by the contribution of the $\rho$. The asymptotic behavior of the form factors are also calculated, and are found to be perfectly accordant with the prediction of conformal symmetry and pertubative QCD.
|
hep-ph/0110297
|
Paul Hoyer
|
Patrik Eden, Paul Hoyer and Alexander Khodjamirian
|
Duality in Semi-Exclusive Processes
|
4 pages, 1 figure
|
JHEP 0110:040,2001
|
10.1088/1126-6708/2001/10/040
|
NORDITA-2001-46 HE, TTP01-28
|
hep-ph
| null |
Semi-exclusive processes like \gamma p \to \pi^+ Y are closely analogous to
DIS, ep \to eX, in the limit where the momentum transfer |t| to the pion and
the mass of the inclusive system Y are large but still much smaller than the
total CM energy. We apply Bloom-Gilman duality to this semi-exclusive process.
The energy dependence of the \gamma p \to \pi^+ n cross section given by
semi-local duality agrees with data for moderate values of |t|, but its
normalization is underestimated by about two orders of magnitude. This
indicates that rather high momentum transfers are required for the validity of
PQCD in the hard subprocess \gamma u \to \pi^+ d. In the case of Compton
scattering \gamma p \to \gamma p the analogous discrepancy is about one order
of magnitude. In electroproduction the virtuality of the incoming photon can be
used to directly measure the hardness of the subprocess.
|
[
{
"created": "Tue, 23 Oct 2001 16:56:20 GMT",
"version": "v1"
}
] |
2010-02-03
|
[
[
"Eden",
"Patrik",
""
],
[
"Hoyer",
"Paul",
""
],
[
"Khodjamirian",
"Alexander",
""
]
] |
Semi-exclusive processes like \gamma p \to \pi^+ Y are closely analogous to DIS, ep \to eX, in the limit where the momentum transfer |t| to the pion and the mass of the inclusive system Y are large but still much smaller than the total CM energy. We apply Bloom-Gilman duality to this semi-exclusive process. The energy dependence of the \gamma p \to \pi^+ n cross section given by semi-local duality agrees with data for moderate values of |t|, but its normalization is underestimated by about two orders of magnitude. This indicates that rather high momentum transfers are required for the validity of PQCD in the hard subprocess \gamma u \to \pi^+ d. In the case of Compton scattering \gamma p \to \gamma p the analogous discrepancy is about one order of magnitude. In electroproduction the virtuality of the incoming photon can be used to directly measure the hardness of the subprocess.
|
1608.07127
|
Danny van Dyk
|
Philipp B\"oer (Siegen U), Thorsten Feldmann (Siegen U), Danny van Dyk
(Siegen U and Zurich U)
|
QCD Factorization for $B \to \pi\pi\ell\nu$ Decays at Large Dipion
Masses
|
38 pages, 5 figures; v2: as published, conclusions unchanged
|
JHEP 1702 (2017) 133
|
10.1007/JHEP02(2017)133
|
SI-HEP-2016-05, QFET-2016-02, ZU-TH 19/16, EOS-2016-04
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We introduce a factorization formula for semi-leptonic $b \to u$ transitions
in the exclusive decay mode $B^- \to \pi^+\pi^-\ell^-\bar\nu_\ell$ in the limit
of large pion energies and large dipion invariant mass. One contribution can be
described in terms of a universal $B \to \pi$ form factor and the convolution
of a short-distance kernel $T^{\rm I}$ with the respective light-cone
distribution amplitudes (LCDAs) of the positively charged pion. The second
contribution, at leading power, completely factorizes, with a short-distance
kernel $T^{\rm II}$ convoluted with the leading-twist LCDAs for both pions and
the $B$-meson. We calculate the leading contributions to the short-distance
kernels $T^{\rm I}$ and $T^{\rm II}$ in fixed-order perturbation theory, and
discuss the approximate relations among the resulting $B \to \pi\pi$
partial-wave form factors. Our results provide useful theoretical constraints
for phenomenological models that aim to analyze the complete $B \to \pi\pi
\ell\nu$ phase space.
|
[
{
"created": "Thu, 25 Aug 2016 13:08:10 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Mar 2017 08:26:13 GMT",
"version": "v2"
}
] |
2017-03-30
|
[
[
"Böer",
"Philipp",
"",
"Siegen U"
],
[
"Feldmann",
"Thorsten",
"",
"Siegen U"
],
[
"van Dyk",
"Danny",
"",
"Siegen U and Zurich U"
]
] |
We introduce a factorization formula for semi-leptonic $b \to u$ transitions in the exclusive decay mode $B^- \to \pi^+\pi^-\ell^-\bar\nu_\ell$ in the limit of large pion energies and large dipion invariant mass. One contribution can be described in terms of a universal $B \to \pi$ form factor and the convolution of a short-distance kernel $T^{\rm I}$ with the respective light-cone distribution amplitudes (LCDAs) of the positively charged pion. The second contribution, at leading power, completely factorizes, with a short-distance kernel $T^{\rm II}$ convoluted with the leading-twist LCDAs for both pions and the $B$-meson. We calculate the leading contributions to the short-distance kernels $T^{\rm I}$ and $T^{\rm II}$ in fixed-order perturbation theory, and discuss the approximate relations among the resulting $B \to \pi\pi$ partial-wave form factors. Our results provide useful theoretical constraints for phenomenological models that aim to analyze the complete $B \to \pi\pi \ell\nu$ phase space.
|
1011.6593
|
Andrey Tayduganov
|
Emi Kou, Alain Le Yaouanc, Andrey Tayduganov
|
Determining the photon polarization of the b --> s gamma using the B -->
K1(1270) gamma --> (K pi pi) gamma decay
|
26 pages, 3 figures a typo in Eq.27 is corrected in version 2
|
Phys.Rev.D83:094007,2011
|
10.1103/PhysRevD.83.094007
|
LPT-ORSAY-10-91, LAL-10-209
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recently the radiative B decay to the strange axial-vector mesons, B -->
K1(1270) gamma, has been observed with rather large branching ratio. This
process is particularly interesting as the subsequent K1 decay into its three
body final state allows us to determine the polarization of the photon, which
is mostly left- (right-)handed for Bbar (B) in the SM while various new physics
models predict additional right- (left-)handed components. A new method is
proposed to determine the polarization, exploiting the full Dalitz plot
distribution, which seems to reduce significantly the statistical errors. This
polarization measurement requires however a detailed knowledge of the K1--> K
pi pi strong interaction decays, namely, the various partial wave amplitudes
into the several possible quasi two-body channels, as well as their relative
phases. The pattern of partial waves is especially complex for the K1(1270). We
attempt to obtain the information through the combination of an experimental
input and a theoretical one, provided by the 3P0 quark-pair-creation model.
|
[
{
"created": "Tue, 30 Nov 2010 15:58:57 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Oct 2018 14:42:06 GMT",
"version": "v2"
}
] |
2018-10-12
|
[
[
"Kou",
"Emi",
""
],
[
"Yaouanc",
"Alain Le",
""
],
[
"Tayduganov",
"Andrey",
""
]
] |
Recently the radiative B decay to the strange axial-vector mesons, B --> K1(1270) gamma, has been observed with rather large branching ratio. This process is particularly interesting as the subsequent K1 decay into its three body final state allows us to determine the polarization of the photon, which is mostly left- (right-)handed for Bbar (B) in the SM while various new physics models predict additional right- (left-)handed components. A new method is proposed to determine the polarization, exploiting the full Dalitz plot distribution, which seems to reduce significantly the statistical errors. This polarization measurement requires however a detailed knowledge of the K1--> K pi pi strong interaction decays, namely, the various partial wave amplitudes into the several possible quasi two-body channels, as well as their relative phases. The pattern of partial waves is especially complex for the K1(1270). We attempt to obtain the information through the combination of an experimental input and a theoretical one, provided by the 3P0 quark-pair-creation model.
|
2206.09225
|
Lucas Johns
|
Lucas Johns and Hiroki Nagakura
|
Self-consistency in models of neutrino scattering and fast flavor
conversion
|
11 pages, 2 figures
| null |
10.1103/PhysRevD.106.043031
| null |
hep-ph astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Several recent numerical studies have examined the effects of neutrino
neutral-current scattering on fast flavor conversion (FFC). Those studies are
in apparent conflict, with some finding enhancement of flavor conversion and
others finding suppression. The ones that report enhancement all use
homogeneous models, and we discuss in detail the self-consistency issues that
they face as a result. We reproduce scattering-enhanced FFC in our own
homogeneous calculations, showing that it occurs for both neutral- and
charged-current scattering and that it is due to isotropization of the angular
distributions over time. Because this is the very feature of the calculations
that is not self-consistent, we conclude that the enhancement effect is of
unclear astrophysical relevance and may not occur in natural environments.
|
[
{
"created": "Sat, 18 Jun 2022 15:43:53 GMT",
"version": "v1"
}
] |
2022-09-14
|
[
[
"Johns",
"Lucas",
""
],
[
"Nagakura",
"Hiroki",
""
]
] |
Several recent numerical studies have examined the effects of neutrino neutral-current scattering on fast flavor conversion (FFC). Those studies are in apparent conflict, with some finding enhancement of flavor conversion and others finding suppression. The ones that report enhancement all use homogeneous models, and we discuss in detail the self-consistency issues that they face as a result. We reproduce scattering-enhanced FFC in our own homogeneous calculations, showing that it occurs for both neutral- and charged-current scattering and that it is due to isotropization of the angular distributions over time. Because this is the very feature of the calculations that is not self-consistent, we conclude that the enhancement effect is of unclear astrophysical relevance and may not occur in natural environments.
|
hep-ph/9905256
|
Patrick B. Greene
|
Patrick B. Greene (Univ. of Toronto, CITA)
|
Inflationary Reheating and Fermions
|
3 pages, LaTeX, uses aipproc.sty and epsf.sty, 4 eps figs included.
Based on an invited talk at the 2nd International Workshop on Particle
Physics and the Early Universe (Cosmo-98), Monterey CA, Nov. 1998.
Proceedings in press
| null |
10.1063/1.59436
| null |
hep-ph astro-ph hep-th
| null |
Coherent oscillations of the inflaton field at the end of inflation can
parametrically excite fermions in much the same way that bosons are created in
preheating. Although Pauli-blocking prohibits the occupation number of created
fermions from growing exponentially, fermion production occurs in a manner
significantly different from the expectations of simple perturbation theory.
Here, I discuss the nature of fermion production after inflation and possible
applications including the efficient transfer of inflaton energy and the
production of super-massive fermions during fermionic preheating.
|
[
{
"created": "Wed, 5 May 1999 23:30:16 GMT",
"version": "v1"
}
] |
2009-10-31
|
[
[
"Greene",
"Patrick B.",
"",
"Univ. of Toronto, CITA"
]
] |
Coherent oscillations of the inflaton field at the end of inflation can parametrically excite fermions in much the same way that bosons are created in preheating. Although Pauli-blocking prohibits the occupation number of created fermions from growing exponentially, fermion production occurs in a manner significantly different from the expectations of simple perturbation theory. Here, I discuss the nature of fermion production after inflation and possible applications including the efficient transfer of inflaton energy and the production of super-massive fermions during fermionic preheating.
|
0901.3495
|
Antonio Vairo
|
Antonio Vairo
|
Effective field theories for heavy quarkonium at finite temperature
|
Plenary talk given at the 8th Conference Quark Confinement and the
Hadron Spectrum, September 1-6, 2008, Mainz, Germany; 11 pages, 9 figures,
PoS
|
PoS Confinement8:002,2008
| null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the recent development of effective field theories for quarkonium
at finite temperature.
|
[
{
"created": "Thu, 22 Jan 2009 15:16:07 GMT",
"version": "v1"
}
] |
2009-06-25
|
[
[
"Vairo",
"Antonio",
""
]
] |
We discuss the recent development of effective field theories for quarkonium at finite temperature.
|
2006.01347
|
Ailin Zhang
|
Hao Yu, Ze Zhao and Ailin Zhang
|
Dynamical mixing between $2^3S_1$ and $1^3D_1$ charmed mesons
|
8 pages, 1 figure, PDFLatex, to appear in Phys.Rev.D
|
Phys. Rev. D 102, 054013 (2020)
|
10.1103/PhysRevD.102.054013
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In charmed $D$ and $D_s$ mesons sector, the matrix of a Hamiltonian in a
quark potential model is computed in the $2^3S_1$ and $1^3D_1$ subspace. The
masses of four mixed states of $2^3S_1$ and $1^3D_1$ denoted with
$D^*_1(2635)$, $D^*_1(2739)$, $D^*_{s1}(2715)$ and $D^*_{s1}(2805)$ are
obtained. It is an off-diagonal part of the spin-orbit tensor interaction that
causes the mixing between the $2^3S_1$ and $1^3D_1$ states. The mixing angles
between the $2^3S_1$ and $1^3D_1$ states are tiny. Under the mixing, a $^3P_0$
model is employed to compute the hadronic decay widths of all OZI-allowed decay
channels of the four mixed states. The two light mixed states $D^*_1(2635)$ and
$D^*_{s1}(2715)$ are close in mass to $D^*_J(2600)$ and $D^*_{s1}(2700)$, while
the two heavy mixed states $D^*_1(2739)$ and $D^*_{s1}(2805)$ are lighter in
mass than $D(2750)$ and $D^*_{s1}(2860)$. The mixing angles obtained from
dynamical interaction are inconsistent with the mixing angles obtained from
hadronic decay. Based on mass spectra and hadronic decay analyses,
$D^*_J(2600)$, $D(2750)$, $D^*_{s1}(2700)$ and $D^*_{s1}(2860)$ are impossibly
the mixed states of $2^3S_1$ and $1^3D_1$ at the small mixing angles. The
inconsistence implies that $D^*_1(2760)$ and $D^*_{s1}(2860)$ have not been
properly resolved from present experimental data, or there exist large unknown
off-diagonal interactions that result in large mixing angles.
|
[
{
"created": "Tue, 2 Jun 2020 02:14:44 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Sep 2020 02:24:56 GMT",
"version": "v2"
}
] |
2020-09-23
|
[
[
"Yu",
"Hao",
""
],
[
"Zhao",
"Ze",
""
],
[
"Zhang",
"Ailin",
""
]
] |
In charmed $D$ and $D_s$ mesons sector, the matrix of a Hamiltonian in a quark potential model is computed in the $2^3S_1$ and $1^3D_1$ subspace. The masses of four mixed states of $2^3S_1$ and $1^3D_1$ denoted with $D^*_1(2635)$, $D^*_1(2739)$, $D^*_{s1}(2715)$ and $D^*_{s1}(2805)$ are obtained. It is an off-diagonal part of the spin-orbit tensor interaction that causes the mixing between the $2^3S_1$ and $1^3D_1$ states. The mixing angles between the $2^3S_1$ and $1^3D_1$ states are tiny. Under the mixing, a $^3P_0$ model is employed to compute the hadronic decay widths of all OZI-allowed decay channels of the four mixed states. The two light mixed states $D^*_1(2635)$ and $D^*_{s1}(2715)$ are close in mass to $D^*_J(2600)$ and $D^*_{s1}(2700)$, while the two heavy mixed states $D^*_1(2739)$ and $D^*_{s1}(2805)$ are lighter in mass than $D(2750)$ and $D^*_{s1}(2860)$. The mixing angles obtained from dynamical interaction are inconsistent with the mixing angles obtained from hadronic decay. Based on mass spectra and hadronic decay analyses, $D^*_J(2600)$, $D(2750)$, $D^*_{s1}(2700)$ and $D^*_{s1}(2860)$ are impossibly the mixed states of $2^3S_1$ and $1^3D_1$ at the small mixing angles. The inconsistence implies that $D^*_1(2760)$ and $D^*_{s1}(2860)$ have not been properly resolved from present experimental data, or there exist large unknown off-diagonal interactions that result in large mixing angles.
|
hep-ph/0611006
|
Pankaj Jain
|
Avijit K. Ganguly, Pankaj Jain, Subhayan Mandal and Sarah Stokes
|
Self Interacting Dark Matter in the Solar System
|
17 pages, 2 figures
|
Phys.Rev.D76:025026,2007
|
10.1103/PhysRevD.76.025026
| null |
hep-ph astro-ph
| null |
Weakly coupled, almost massless, spin 0 particles have been predicted by many
extensions of the standard model of particle physics. Recently, the PVLAS group
observed a rotation of polarization of electromagnetic waves in vacuum in the
presence of transverse magnetic field. This phenomenon is best explained by the
existence of a weakly coupled light pseudoscalar particle. However, the
coupling required by this experiment is much larger than the conventional
astrophysical limits. Here we consider a hypothetical self-interacting
pseudoscalar particle which couples weakly with visible matter.
Assuming that these pseudoscalars pervade the galaxy, we show that the solar
limits on the pseudoscalar-photon coupling can be evaded.
|
[
{
"created": "Wed, 1 Nov 2006 11:01:23 GMT",
"version": "v1"
},
{
"created": "Wed, 9 May 2007 04:11:05 GMT",
"version": "v2"
}
] |
2008-11-26
|
[
[
"Ganguly",
"Avijit K.",
""
],
[
"Jain",
"Pankaj",
""
],
[
"Mandal",
"Subhayan",
""
],
[
"Stokes",
"Sarah",
""
]
] |
Weakly coupled, almost massless, spin 0 particles have been predicted by many extensions of the standard model of particle physics. Recently, the PVLAS group observed a rotation of polarization of electromagnetic waves in vacuum in the presence of transverse magnetic field. This phenomenon is best explained by the existence of a weakly coupled light pseudoscalar particle. However, the coupling required by this experiment is much larger than the conventional astrophysical limits. Here we consider a hypothetical self-interacting pseudoscalar particle which couples weakly with visible matter. Assuming that these pseudoscalars pervade the galaxy, we show that the solar limits on the pseudoscalar-photon coupling can be evaded.
|
hep-ph/0201283
|
Sergei Shulga
|
A. Belkov, S. Shulga
|
SIMUB -- a Monte Carlo Generator for Physics Simulation of B Decays
|
16 pages, 3 figures, submitted to VI-th International School-Seminar
"Actual Problems of Particle Physics", August 7-16, 2001, Gomel, Belarus, see
http://gomelschool.hep.by
| null | null | null |
hep-ph
| null |
We present the SIMUB package developed at Dubna for MC generation of B meson
production and decays.
The starting version of the package includes lepton modes of B decays, in
particular, semileptonic decays B->D^*l\nu and "golden" mode
B->J/\psi(\mu\mu)\phi(KK) with taking into account all theoretical refinements
including B^0-Bbar^0 oscillations and angular correlations.
|
[
{
"created": "Wed, 30 Jan 2002 13:48:38 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Belkov",
"A.",
""
],
[
"Shulga",
"S.",
""
]
] |
We present the SIMUB package developed at Dubna for MC generation of B meson production and decays. The starting version of the package includes lepton modes of B decays, in particular, semileptonic decays B->D^*l\nu and "golden" mode B->J/\psi(\mu\mu)\phi(KK) with taking into account all theoretical refinements including B^0-Bbar^0 oscillations and angular correlations.
|
hep-ph/9912486
|
Jeff Forshaw
|
B E Cox and J R Forshaw
|
Diffractive production of high pt photons at HERA
|
4 pages, 4 figures. Contribution to the 1999 UK Phenomenology
Workshop on Collider Physics, Durham, UK
|
J.Phys.G26:702-706,2000
|
10.1088/0954-3899/26/5/330
|
CERN-TH/99-394
|
hep-ph
| null |
We study the diffractive production of high pt photons at HERA. We have
implemented the process as a new hard sub-process in the HERWIG event generator
in order to prepare the ground for a future measurement.
|
[
{
"created": "Thu, 23 Dec 1999 12:16:43 GMT",
"version": "v1"
}
] |
2008-11-26
|
[
[
"Cox",
"B E",
""
],
[
"Forshaw",
"J R",
""
]
] |
We study the diffractive production of high pt photons at HERA. We have implemented the process as a new hard sub-process in the HERWIG event generator in order to prepare the ground for a future measurement.
|
hep-ph/9811275
|
Konstantin Chetyrkin
|
K.G. Chetyrkin (U. of Karlsruhe), Stephan Narison (U. of Montpellier),
V.I. Zakharov (MPI, Munchen)
|
Short-distance tachyonic gluon mass and 1/Q^2 corrections
|
18 pages, 1 figure, Latex, epsfig.sty is required. New version: we
have added a discussion about the effects of the tachyonic gluon mass on the
value of strange quark mass as extracted from tau decays. Two references are
added. The complete paper, including figures, is also available via anonymous
ftp at ftp://ttpux2.physik.uni-karlsruhe.de/ttp98/ttp98-39/ or via www at
http://www-ttp.physik.uni-karlsruhe.de/cgi-bin/preprints/
|
Nucl.Phys. B550 (1999) 353-374
|
10.1016/S0550-3213(99)00167-4
|
TTP98-39, PM/98-35
|
hep-ph hep-ex hep-lat
| null |
We consider the assumption that a tachyonic gluon mass imitates
short-distance nonperturbative physics of QCD. The phenomenological
implications include modifications of the QCD sum rules for correlators of
currents with various quantum numbers. The new 1/Q^2 terms allow to resolve in
a natural way old puzzles in the pion and scalar-gluonium channels. They lead
to a slight reduction of the values of the running light quark masses from the
(pseudo)scalar sum rules and of alpha_s(M_\tau) from tau decay data. Further
tests can be provided by precision measurements of the correlators on the
lattice and by the e^+e^- --> hadrons data.
|
[
{
"created": "Mon, 9 Nov 1998 13:10:37 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Apr 1999 10:38:01 GMT",
"version": "v2"
}
] |
2009-10-31
|
[
[
"Chetyrkin",
"K. G.",
"",
"U. of Karlsruhe"
],
[
"Narison",
"Stephan",
"",
"U. of Montpellier"
],
[
"Zakharov",
"V. I.",
"",
"MPI, Munchen"
]
] |
We consider the assumption that a tachyonic gluon mass imitates short-distance nonperturbative physics of QCD. The phenomenological implications include modifications of the QCD sum rules for correlators of currents with various quantum numbers. The new 1/Q^2 terms allow to resolve in a natural way old puzzles in the pion and scalar-gluonium channels. They lead to a slight reduction of the values of the running light quark masses from the (pseudo)scalar sum rules and of alpha_s(M_\tau) from tau decay data. Further tests can be provided by precision measurements of the correlators on the lattice and by the e^+e^- --> hadrons data.
|
1709.05962
|
Guo-Liang Ma
|
Xin-Li Zhao, Yu-Gang Ma, Guo-Liang Ma
|
Electromagnetic fields in small systems from a multiphase transport
model
|
7 pages, 10 figures; final published version
|
Phys. Rev. C 97, 024910 (2018)
|
10.1103/PhysRevC.97.024910
| null |
hep-ph nucl-ex nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We calculate the electromagnetic fields generated in small systems by using a
multiphase transport (AMPT) model. Compared to $A+A$ collisions, we find that
the absolute electric and magnetic fields are not small in $p$+Au and $d$+Au
collisions at energies available at the BNL Relativistic Heavy Ion Collider and
in $p$+Pb collisions at energies available at the CERN Large Hadron Collider.
We study the centrality dependencies and the spatial distributions of
electromagnetic fields. We further investigate the azimuthal fluctuations of
the magnetic field and its correlation with the fluctuating geometry using
event-by-event simulations. We find that the azimuthal correlation
$\left\langle \cos2(\Psi_B - \Psi_{2}) \right\rangle$ between the magnetic
field direction and the second harmonic participant plane is almost zero in
small systems with high multiplicities, but not in those with low
multiplicities. This indicates that the charge azimuthal correlation,
$\left\langle \cos(\phi_{\alpha}+\phi_{\beta} - 2\Psi_{RP}) \right\rangle$, is
not a valid probe to study the chiral magnetic effect (CME) in small systems
with high multiplicities. However, we suggest searching for possible CME
effects in small systems with low multiplicities.
|
[
{
"created": "Fri, 15 Sep 2017 04:06:39 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Sep 2017 08:20:24 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Feb 2018 01:10:51 GMT",
"version": "v3"
}
] |
2018-02-22
|
[
[
"Zhao",
"Xin-Li",
""
],
[
"Ma",
"Yu-Gang",
""
],
[
"Ma",
"Guo-Liang",
""
]
] |
We calculate the electromagnetic fields generated in small systems by using a multiphase transport (AMPT) model. Compared to $A+A$ collisions, we find that the absolute electric and magnetic fields are not small in $p$+Au and $d$+Au collisions at energies available at the BNL Relativistic Heavy Ion Collider and in $p$+Pb collisions at energies available at the CERN Large Hadron Collider. We study the centrality dependencies and the spatial distributions of electromagnetic fields. We further investigate the azimuthal fluctuations of the magnetic field and its correlation with the fluctuating geometry using event-by-event simulations. We find that the azimuthal correlation $\left\langle \cos2(\Psi_B - \Psi_{2}) \right\rangle$ between the magnetic field direction and the second harmonic participant plane is almost zero in small systems with high multiplicities, but not in those with low multiplicities. This indicates that the charge azimuthal correlation, $\left\langle \cos(\phi_{\alpha}+\phi_{\beta} - 2\Psi_{RP}) \right\rangle$, is not a valid probe to study the chiral magnetic effect (CME) in small systems with high multiplicities. However, we suggest searching for possible CME effects in small systems with low multiplicities.
|
1304.6708
|
Yong Zhao
|
Xiangdong Ji, Jian-Hui Zhang, and Yong Zhao
|
Physics of Gluon Helicity Contribution to Proton Spin
|
7 pages, 1 figure
|
Phys.Rev.Lett. 111, 112002 (2013)
|
10.1103/PhysRevLett.111.112002
|
PP-013-004
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The total gluon helicity in a polarized proton, measurable in high-energy
scattering, is shown to be the large momentum limit of a gauge-invariant but
non-local, frame-dependent gluon spin $\vec{E}\times \vec{A}_\perp$ in QCD.
This opens a door for a non-perturbative calculation of this quantity in
lattice QCD, and also justifies using free-field expressions in the light-cone
gauge as physical observables.
|
[
{
"created": "Wed, 24 Apr 2013 19:49:46 GMT",
"version": "v1"
}
] |
2013-09-16
|
[
[
"Ji",
"Xiangdong",
""
],
[
"Zhang",
"Jian-Hui",
""
],
[
"Zhao",
"Yong",
""
]
] |
The total gluon helicity in a polarized proton, measurable in high-energy scattering, is shown to be the large momentum limit of a gauge-invariant but non-local, frame-dependent gluon spin $\vec{E}\times \vec{A}_\perp$ in QCD. This opens a door for a non-perturbative calculation of this quantity in lattice QCD, and also justifies using free-field expressions in the light-cone gauge as physical observables.
|
hep-ph/0212375
|
Mu-Chun Chen
|
Mu-Chun Chen and K.T. Mahanthappa
|
Symmetric Textures in SO(10) and LMA Solution for Solar Neutrinos
|
RevTeX4; 9 pages; 1 figure
|
Phys.Rev. D68 (2003) 017301
|
10.1103/PhysRevD.68.017301
|
BNL-HET-02/30,COLO-HEP-484
|
hep-ph
| null |
We analyze a model based on SUSY SO(10) combined with SU(2) family symmetry
and symmetric mass matrices constructed by the authors recently. Previously,
only the parameter space for the LOW and vacuum oscillation (VO) solutions was
investigated. We indicate in this note the parameter space which leads to large
mixing angle (LMA) solution to the solar neutrino problem with a slightly
modified effective neutrino mass matrix. The symmetric mass textures arising
from the left-right symmetry breaking and the SU(2) symmetry breaking give rise
to very good predictions for the quark and lepton masses and mixing angles. The
prediction of our model for the |U_{e\nu_{3}}| element in the
Maki-Nakagawa-Sakata (MNS) matrix is close to the sensitivity of current
experiments; thus the validity of our model can be tested in the near future.
We also investigate the correlation between the |U_{e\nu_{3}}| element and
\tan^{2}\theta_{\odot} in a general two-zero neutrino mass texture.
|
[
{
"created": "Thu, 26 Dec 2002 16:54:29 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jan 2003 21:52:40 GMT",
"version": "v2"
}
] |
2009-11-07
|
[
[
"Chen",
"Mu-Chun",
""
],
[
"Mahanthappa",
"K. T.",
""
]
] |
We analyze a model based on SUSY SO(10) combined with SU(2) family symmetry and symmetric mass matrices constructed by the authors recently. Previously, only the parameter space for the LOW and vacuum oscillation (VO) solutions was investigated. We indicate in this note the parameter space which leads to large mixing angle (LMA) solution to the solar neutrino problem with a slightly modified effective neutrino mass matrix. The symmetric mass textures arising from the left-right symmetry breaking and the SU(2) symmetry breaking give rise to very good predictions for the quark and lepton masses and mixing angles. The prediction of our model for the |U_{e\nu_{3}}| element in the Maki-Nakagawa-Sakata (MNS) matrix is close to the sensitivity of current experiments; thus the validity of our model can be tested in the near future. We also investigate the correlation between the |U_{e\nu_{3}}| element and \tan^{2}\theta_{\odot} in a general two-zero neutrino mass texture.
|
hep-ph/9912202
|
A. A. Arkhipov
|
A.A. Arkhipov
|
On the Relation between the Slopes of Diffraction Cone in Single
Diffraction Dissociation and Elastic Scattering
|
Latex2e, 4 pages
| null | null |
Preprint IHEP 99-44, Protvino, 1999
|
hep-ph
| null |
The fundamental relation between the slopes of diffraction cone in single
diffraction dissociation and elastic scattering has been derived.
|
[
{
"created": "Wed, 1 Dec 1999 10:04:37 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Arkhipov",
"A. A.",
""
]
] |
The fundamental relation between the slopes of diffraction cone in single diffraction dissociation and elastic scattering has been derived.
|
0804.1562
|
Miguel Costa S
|
Lorenzo Cornalba and Miguel S. Costa
|
Saturation in Deep Inelastic Scattering from AdS/CFT
|
24 pages, 9 figures; (v2) data analysis improved, 4 new figures,
added references; (v3) improved section on relation to dipole formalism
|
Phys.Rev.D78:096010,2008
|
10.1103/PhysRevD.78.096010
| null |
hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analyze deep inelastic scattering at small Bjorken x, using the
approximate conformal invariance of QCD at high energies. Hard pomeron
exchanges are resummed eikonally, restoring unitarity at large values of the
phase shift in the dual AdS geometry. At weak coupling this phase is imaginary,
corresponding to a black disk in AdS. In this saturated regime, cross sections
exhibit geometric scaling and have a simple universal form, which we test
against available experimental data for the proton structure function
F_2(x,Q^2). We predict, in particular, the dependence of the cross section on
the scaling variable (Q/Q_s)^2 in the deeply saturated region, where Q_s is the
usual saturation scale. We find agreement with current data on F_2 in the
kinematical region 0.5 < Q^2 < 10 GeV^2, x < 10^-2, with an average 6%
accuracy. We conclude by discussing the relation of our approach with the
commonly used dipole formalism.
|
[
{
"created": "Wed, 9 Apr 2008 21:00:21 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Jun 2008 17:46:00 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Mar 2009 17:03:40 GMT",
"version": "v3"
}
] |
2009-03-19
|
[
[
"Cornalba",
"Lorenzo",
""
],
[
"Costa",
"Miguel S.",
""
]
] |
We analyze deep inelastic scattering at small Bjorken x, using the approximate conformal invariance of QCD at high energies. Hard pomeron exchanges are resummed eikonally, restoring unitarity at large values of the phase shift in the dual AdS geometry. At weak coupling this phase is imaginary, corresponding to a black disk in AdS. In this saturated regime, cross sections exhibit geometric scaling and have a simple universal form, which we test against available experimental data for the proton structure function F_2(x,Q^2). We predict, in particular, the dependence of the cross section on the scaling variable (Q/Q_s)^2 in the deeply saturated region, where Q_s is the usual saturation scale. We find agreement with current data on F_2 in the kinematical region 0.5 < Q^2 < 10 GeV^2, x < 10^-2, with an average 6% accuracy. We conclude by discussing the relation of our approach with the commonly used dipole formalism.
|
hep-ph/0702081
|
Gilberto Tavares-Velasco
|
F. Ramirez-Zavaleta, G. Tavares-Velasco, J. J. Toscano
|
Bilepton effects on the WWV^* vertex in the 331 model with right-handed
neutrinos via a SU_L(2)XU_Y(1) covariant quantization scheme
|
Replaced to match published version
|
Phys.Rev.D75:075008,2007
|
10.1103/PhysRevD.75.075008
| null |
hep-ph
| null |
In a recent paper, we investigated the effects of the massive charged gauge
bosons (bileptons) predicted by the minimal 331 model on the off-shell vertex
WWV^* (V=gamma, Z) using a SU_L(2) X U_Y(1) covariant gauge-fixing term for the
bileptons. We proceed along the same lines and calculate the effects of the
gauge bosons predicted by the 331 model with right-handed neutrinos. It is
found that the bilepton effects on the WWV^* vertex are of the same order of
magnitude than those arising from the SM and several of its extensions,
provided that the bilepton mass is of the order of a few hundred of GeVs. For
heavier bileptons, their effects on the WWV^* vertex are negligible. The
behavior of the form factors at high energies is also discussed as it is a
reflect of the gauge invariance and gauge independence of the WWV^* Green
function obtained via our quantization method.
|
[
{
"created": "Thu, 8 Feb 2007 00:13:14 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Mar 2007 20:05:57 GMT",
"version": "v2"
}
] |
2008-11-26
|
[
[
"Ramirez-Zavaleta",
"F.",
""
],
[
"Tavares-Velasco",
"G.",
""
],
[
"Toscano",
"J. J.",
""
]
] |
In a recent paper, we investigated the effects of the massive charged gauge bosons (bileptons) predicted by the minimal 331 model on the off-shell vertex WWV^* (V=gamma, Z) using a SU_L(2) X U_Y(1) covariant gauge-fixing term for the bileptons. We proceed along the same lines and calculate the effects of the gauge bosons predicted by the 331 model with right-handed neutrinos. It is found that the bilepton effects on the WWV^* vertex are of the same order of magnitude than those arising from the SM and several of its extensions, provided that the bilepton mass is of the order of a few hundred of GeVs. For heavier bileptons, their effects on the WWV^* vertex are negligible. The behavior of the form factors at high energies is also discussed as it is a reflect of the gauge invariance and gauge independence of the WWV^* Green function obtained via our quantization method.
|
1603.00868
|
Cesar Fernandez-Ramirez
|
Cesar Fernandez-Ramirez
|
Amplitude analysis of $\bar{K}N$ scattering
|
Proceedings of the 39th Symposium on Nuclear Physics 2016 Cocoyoc,
Mexico
|
Journal of Physics: Conference Series 730, 012010 (2016)
|
10.1088/1742-6596/730/1/012010
| null |
hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present the results of a coupled-channel model for $\bar{K}N$ scattering
in the resonance region. The model fulfills unitarity, has the correct
analytical properties for the amplitudes and the partial waves have the right
threshold behavior. The parameters of the model have been established by
fitting single-energy partial waves up to $J=7/2$ and up to 2.15 GeV of
center-of-mass energy. The $\Lambda^*$ and $\Sigma^*$ spectra has been
obtained, providing a comprehensive picture of the $S=-1$ hyperon spectrum. We
use the structure of the hyperon spectrum and Regge phenomenology to gain
insight on the nature of the $\Lambda(1405)$ resonances.
|
[
{
"created": "Wed, 2 Mar 2016 20:59:09 GMT",
"version": "v1"
}
] |
2016-08-03
|
[
[
"Fernandez-Ramirez",
"Cesar",
""
]
] |
We present the results of a coupled-channel model for $\bar{K}N$ scattering in the resonance region. The model fulfills unitarity, has the correct analytical properties for the amplitudes and the partial waves have the right threshold behavior. The parameters of the model have been established by fitting single-energy partial waves up to $J=7/2$ and up to 2.15 GeV of center-of-mass energy. The $\Lambda^*$ and $\Sigma^*$ spectra has been obtained, providing a comprehensive picture of the $S=-1$ hyperon spectrum. We use the structure of the hyperon spectrum and Regge phenomenology to gain insight on the nature of the $\Lambda(1405)$ resonances.
|
hep-ph/9903513
|
Mikko Laine
|
M. Laine (CERN)
|
The renormalized gauge coupling and non-perturbative tests of
dimensional reduction
|
17 pages; a slightly extended version, results unchanged
|
JHEP 9906 (1999) 020
|
10.1088/1126-6708/1999/06/020
|
CERN-TH/99-62
|
hep-ph
| null |
In 4d lattice simulations of Standard Model like theories, the renormalized
gauge coupling in the broken phase can be determined from the prefactor of the
Yukawa term in the static potential. We compute the same quantity in terms of
the conventional MSbar scheme gauge coupling. The result allows for a further
non-perturbative test of finite temperature dimensional reduction, by a
comparison of the critical temperatures for the electroweak phase transition as
obtained with 4d lattice simulations and with 3d effective theory simulations.
|
[
{
"created": "Mon, 29 Mar 1999 14:48:45 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Jul 1999 14:37:57 GMT",
"version": "v2"
}
] |
2009-10-31
|
[
[
"Laine",
"M.",
"",
"CERN"
]
] |
In 4d lattice simulations of Standard Model like theories, the renormalized gauge coupling in the broken phase can be determined from the prefactor of the Yukawa term in the static potential. We compute the same quantity in terms of the conventional MSbar scheme gauge coupling. The result allows for a further non-perturbative test of finite temperature dimensional reduction, by a comparison of the critical temperatures for the electroweak phase transition as obtained with 4d lattice simulations and with 3d effective theory simulations.
|
1503.03026
|
Antonio Enrique C\'arcamo Hern\'andez acarcamo
|
A. E. C\'arcamo Hern\'andez, Sergey Kovalenko, Iv\'an Schmidt
|
Precision measurements constraints on the number of Higgs doublets
|
17 pages, 12 figures. Version published in Physical Review D
|
Phys. Rev. D 91, 095014 (2015)
|
10.1103/PhysRevD.91.095014
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider an extension of the Standard Model with an arbitrary number $N$
of Higgs doublets (NHDM), and calculate their contribution to the oblique
parameters $S$ and $T$. We examine the possible limitations on $N$ from
precision measurements of these parameters. In view of the complexity of the
general case of NHDM, we analyze several benchmark scenarios for the Higgs mass
spectrum, identifying the lightest CP-even Higgs with the Higgs-like particle
recently observed at the LHC with the mass of $\sim 125$ GeV. The rest of the
Higgses are put above the mass scale of $\sim 600$ GeV, below which the LHC
experiments do not detect any Higgs-like signals except for the former famous
one. We show that, in a scenario, with all the heavy Higgses degenerate at any
scale, there are no limitations on the number $N$ of the Higgs doublets.
However, upper limits appear for certain not completely degenerate
configurations of the heavy Higgses.
|
[
{
"created": "Tue, 10 Mar 2015 18:27:33 GMT",
"version": "v1"
},
{
"created": "Tue, 19 May 2015 19:54:28 GMT",
"version": "v2"
}
] |
2015-05-20
|
[
[
"Hernández",
"A. E. Cárcamo",
""
],
[
"Kovalenko",
"Sergey",
""
],
[
"Schmidt",
"Iván",
""
]
] |
We consider an extension of the Standard Model with an arbitrary number $N$ of Higgs doublets (NHDM), and calculate their contribution to the oblique parameters $S$ and $T$. We examine the possible limitations on $N$ from precision measurements of these parameters. In view of the complexity of the general case of NHDM, we analyze several benchmark scenarios for the Higgs mass spectrum, identifying the lightest CP-even Higgs with the Higgs-like particle recently observed at the LHC with the mass of $\sim 125$ GeV. The rest of the Higgses are put above the mass scale of $\sim 600$ GeV, below which the LHC experiments do not detect any Higgs-like signals except for the former famous one. We show that, in a scenario, with all the heavy Higgses degenerate at any scale, there are no limitations on the number $N$ of the Higgs doublets. However, upper limits appear for certain not completely degenerate configurations of the heavy Higgses.
|
hep-ph/9607217
| null |
A.V. Efremov, E. Leader, and O.V. Teryaev
|
An exact sum rule for transversely polarized DIS
|
16 pages, LaTeX file, one figure appended as EPSF file. Submitted to
Nucl. Phys. B
|
Phys. Rev. D 55, 4307 (1997)
|
10.1103/PhysRevD.55.4307
| null |
hep-ph
| null |
The Operator Product Expansion provides expressions for the $n^{th}$ moments
of $g_1(x)$ and $g_2(x)$ in terms of hadronic matrix elements of local
operators for $n =$ odd integer. In some cases these matrix elements are
expected to be small leading to approximate sum rules for the {\em odd\/}
moments of $g_{1,2}(x)$. We have shown how, working in a field-theoretic
framework, one can derive expressions for the {\em even\/} moments of the {\em
valence\/} parts of $g_{1,2}(x)$. These expressions cannot be written as matrix
elements of {\em local\/} operators and do not coincide with the analytic
continuation to $n=$ even integer of the OPE results.
Just as for the OPE one can in some cases argue that the hadronic matrix
elements should be small, leading to approximate sum rules for the moments of
the valence parts of $g_{1,2}(x)$. But, most importantly, for the case $n=2$ we
have proved rigorously that the hadronic matrix element vanishes, yielding the
exact ELT sum rule \int^1_0 dx\, x\left[g^V_1(x)+2g^V_2(x)\right]=0.
We have argued that the convergence properties of this sum rule are good and
have discussed how it can be used to get information about $g_2(x)$ and as a
further test of QCD.
|
[
{
"created": "Tue, 2 Jul 1996 09:48:56 GMT",
"version": "v1"
}
] |
2016-08-24
|
[
[
"Efremov",
"A. V.",
""
],
[
"Leader",
"E.",
""
],
[
"Teryaev",
"O. V.",
""
]
] |
The Operator Product Expansion provides expressions for the $n^{th}$ moments of $g_1(x)$ and $g_2(x)$ in terms of hadronic matrix elements of local operators for $n =$ odd integer. In some cases these matrix elements are expected to be small leading to approximate sum rules for the {\em odd\/} moments of $g_{1,2}(x)$. We have shown how, working in a field-theoretic framework, one can derive expressions for the {\em even\/} moments of the {\em valence\/} parts of $g_{1,2}(x)$. These expressions cannot be written as matrix elements of {\em local\/} operators and do not coincide with the analytic continuation to $n=$ even integer of the OPE results. Just as for the OPE one can in some cases argue that the hadronic matrix elements should be small, leading to approximate sum rules for the moments of the valence parts of $g_{1,2}(x)$. But, most importantly, for the case $n=2$ we have proved rigorously that the hadronic matrix element vanishes, yielding the exact ELT sum rule \int^1_0 dx\, x\left[g^V_1(x)+2g^V_2(x)\right]=0. We have argued that the convergence properties of this sum rule are good and have discussed how it can be used to get information about $g_2(x)$ and as a further test of QCD.
|
1805.08251
|
Farinaldo Queiroz
|
P. V. Dong, D. T. Huong, Daniel A. Camargo, Farinaldo S. Queiroz,
Jos\'e W. F. Valle
|
Asymmetric Dark Matter, Inflation and Leptogenesis from B-L Symmetry
Breaking
|
11 pages, 2 figures
|
Phys. Rev. D 99, 055040 (2019)
|
10.1103/PhysRevD.99.055040
|
IIPDM-2018-04
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a unified setup for dark matter, inflation and baryon asymmetry
generation through the neutrino mass seesaw mechanism. Our scenario emerges
naturally from an extended gauge group containing $B-L$ as a non-commutative
symmetry, broken by a singlet scalar that also drives inflation. Its decays
reheat the universe, producing the lightest right-handed neutrino. Automatic
matter parity conservation leads to the stability of an asymmetric dark matter
candidate, directly linked to the matter-antimatter asymmetry in the universe.
|
[
{
"created": "Mon, 21 May 2018 18:38:41 GMT",
"version": "v1"
}
] |
2019-04-03
|
[
[
"Dong",
"P. V.",
""
],
[
"Huong",
"D. T.",
""
],
[
"Camargo",
"Daniel A.",
""
],
[
"Queiroz",
"Farinaldo S.",
""
],
[
"Valle",
"José W. F.",
""
]
] |
We propose a unified setup for dark matter, inflation and baryon asymmetry generation through the neutrino mass seesaw mechanism. Our scenario emerges naturally from an extended gauge group containing $B-L$ as a non-commutative symmetry, broken by a singlet scalar that also drives inflation. Its decays reheat the universe, producing the lightest right-handed neutrino. Automatic matter parity conservation leads to the stability of an asymmetric dark matter candidate, directly linked to the matter-antimatter asymmetry in the universe.
|
1210.4588
|
Sangyong Jeon
|
Sangwook Ryu, Sangyong Jeon, Charles Gale, Bjoern Schenke, Clint Young
|
MUSIC with the UrQMD Afterburner
|
4 pages, 6 figures in pdf. Submitted to the proceedings of the Quark
Matter 2012 conference (August 13-18, 2012, Washington D.C.)
| null |
10.1016/j.nuclphysa.2013.02.031
| null |
hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
As RHIC is entering the precision measurement era and the LHC is producing a
copious amount of new data, the role of 3+1D event-by-event viscous
hydrodynamics is more important than ever to understand the bulk data as well
as providing the background for hard probes. For more meaningful comparison
with the experimental data, it is also important that hydrodynamics be coupled
to the hadronic afterburner. In this proceeding we report on preliminary
results of coupling MUSIC with UrQMD.
|
[
{
"created": "Tue, 16 Oct 2012 22:17:36 GMT",
"version": "v1"
}
] |
2015-06-11
|
[
[
"Ryu",
"Sangwook",
""
],
[
"Jeon",
"Sangyong",
""
],
[
"Gale",
"Charles",
""
],
[
"Schenke",
"Bjoern",
""
],
[
"Young",
"Clint",
""
]
] |
As RHIC is entering the precision measurement era and the LHC is producing a copious amount of new data, the role of 3+1D event-by-event viscous hydrodynamics is more important than ever to understand the bulk data as well as providing the background for hard probes. For more meaningful comparison with the experimental data, it is also important that hydrodynamics be coupled to the hadronic afterburner. In this proceeding we report on preliminary results of coupling MUSIC with UrQMD.
|
hep-ph/0412069
|
Klaus Peters
|
Klaus Peters
|
A Primer on Partial Wave Analysis
|
62 pages, Lectures given at the Fermi School of Physics, Varenna 2004
|
Int.J.Mod.Phys. A21 (2006) 5618-5624
| null | null |
hep-ph
| null |
In the 90s of the last century high statistics experiments with fully
equipped 4$\pi$ detectors have lead to a better insight in the spectrum of
hadrons. In particular the finding of crypto-exotic and $J^{PC}$ exotic states
tremendously improved the experimental situation in meson spectroscopy. All
this was possible only with sophisticated analysis methods like the
decomposition of measured phase-space distribution into partial waves and to
express the partial waves in terms of complicated dynamical functions. This
paper gives an introduction about the concepts and formalisms involved.
|
[
{
"created": "Sun, 5 Dec 2004 22:51:51 GMT",
"version": "v1"
}
] |
2009-09-29
|
[
[
"Peters",
"Klaus",
""
]
] |
In the 90s of the last century high statistics experiments with fully equipped 4$\pi$ detectors have lead to a better insight in the spectrum of hadrons. In particular the finding of crypto-exotic and $J^{PC}$ exotic states tremendously improved the experimental situation in meson spectroscopy. All this was possible only with sophisticated analysis methods like the decomposition of measured phase-space distribution into partial waves and to express the partial waves in terms of complicated dynamical functions. This paper gives an introduction about the concepts and formalisms involved.
|
1105.3730
|
Kalliopi Petraki
|
Nicole F. Bell, Kalliopi Petraki, Ian M. Shoemaker, Raymond R. Volkas
|
Pangenesis in a Baryon-Symmetric Universe: Dark and Visible Matter via
the Affleck-Dine Mechanism
|
6 pages, references added, PRD version, title changed in journal
|
Phys. Rev. D 84, 123505 (2011)
|
10.1103/PhysRevD.84.123505
| null |
hep-ph astro-ph.CO hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The similarity of the visible and dark matter abundances indicates that they
may originate via the same mechanism. If both the dark and the visible matter
are charged under a generalized baryon number which remains always conserved,
then the asymmetry of the visible sector may be compensated by an asymmetry in
the dark sector. We show how the separation of baryonic and antibaryonic charge
can originate in the vacuum, via the Affleck-Dine mechanism, due to the
breaking of a symmetry orthogonal to the baryon number. Symmetry restoration in
the current epoch guarantees the individual stability of the two sectors.
|
[
{
"created": "Wed, 18 May 2011 20:00:04 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jun 2011 11:05:57 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Nov 2011 13:56:20 GMT",
"version": "v3"
}
] |
2011-12-09
|
[
[
"Bell",
"Nicole F.",
""
],
[
"Petraki",
"Kalliopi",
""
],
[
"Shoemaker",
"Ian M.",
""
],
[
"Volkas",
"Raymond R.",
""
]
] |
The similarity of the visible and dark matter abundances indicates that they may originate via the same mechanism. If both the dark and the visible matter are charged under a generalized baryon number which remains always conserved, then the asymmetry of the visible sector may be compensated by an asymmetry in the dark sector. We show how the separation of baryonic and antibaryonic charge can originate in the vacuum, via the Affleck-Dine mechanism, due to the breaking of a symmetry orthogonal to the baryon number. Symmetry restoration in the current epoch guarantees the individual stability of the two sectors.
|
hep-ph/0011185
|
Andriy Kurylov
|
A. Kurylov, G. C. McLaughlin, and M.J. Ramsey-Musolf
|
Constraints on T-Odd, P-Even Interactions from Electric Dipole Moments
|
43 pages, 9 figures
|
Phys.Rev.D63:076007,2001
|
10.1103/PhysRevD.63.076007
| null |
hep-ph nucl-th
| null |
We construct the relationship between nonrenormalizable,effective,
time-reversal violating (TV) parity-conserving (PC) interactions of quarks and
gauge bosons and various low-energy TVPC and TV parity-violating (PV)
observables. Using effective field theory methods, we delineate the scenarious
under which experimental limits on permanent electric dipole moments (EDM's) of
the electron, neutron, and neutral atoms as well as limits on TVPC observables
provide the most stringent bounds on new TVPC interactions. Under scenarios in
which parity invariance is restored at short distances, the one-loop EDM of
elementary fermions generate the most severe constraints. The limits derived
from the atomic EDM of $^{199}$Hg are considerably weaker. When parity symmetry
remains broken at short distances, direct TVPC search limits provide the least
ambiguous bounds. The direct limits follow from TVPC interactions between two
quarks.
|
[
{
"created": "Wed, 15 Nov 2000 01:58:00 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Dec 2000 20:44:31 GMT",
"version": "v2"
}
] |
2014-11-17
|
[
[
"Kurylov",
"A.",
""
],
[
"McLaughlin",
"G. C.",
""
],
[
"Ramsey-Musolf",
"M. J.",
""
]
] |
We construct the relationship between nonrenormalizable,effective, time-reversal violating (TV) parity-conserving (PC) interactions of quarks and gauge bosons and various low-energy TVPC and TV parity-violating (PV) observables. Using effective field theory methods, we delineate the scenarious under which experimental limits on permanent electric dipole moments (EDM's) of the electron, neutron, and neutral atoms as well as limits on TVPC observables provide the most stringent bounds on new TVPC interactions. Under scenarios in which parity invariance is restored at short distances, the one-loop EDM of elementary fermions generate the most severe constraints. The limits derived from the atomic EDM of $^{199}$Hg are considerably weaker. When parity symmetry remains broken at short distances, direct TVPC search limits provide the least ambiguous bounds. The direct limits follow from TVPC interactions between two quarks.
|
1602.03684
|
Giancarlo Rossi
|
Roberto Frezzotti, Marco Garofalo, Giancarlo Rossi
|
A non-supersymmetric model with unification of electro-weak and strong
interactions
|
15 pages, 6 figures
|
Phys. Rev. D 93, 105030 (2016)
|
10.1103/PhysRevD.93.105030
| null |
hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this note we present an example of an extension of the Standard Model
where unification of strong and electroweak interactions occurs at a level
comparable to that occurring in the minimal supersymmetric standard model.
|
[
{
"created": "Thu, 11 Feb 2016 11:49:52 GMT",
"version": "v1"
}
] |
2016-05-25
|
[
[
"Frezzotti",
"Roberto",
""
],
[
"Garofalo",
"Marco",
""
],
[
"Rossi",
"Giancarlo",
""
]
] |
In this note we present an example of an extension of the Standard Model where unification of strong and electroweak interactions occurs at a level comparable to that occurring in the minimal supersymmetric standard model.
|
1512.07837
|
Seodong Shin
|
Radovan Dermisek, Enrico Lunghi, Seodong Shin
|
New decay modes of heavy Higgs bosons in a two Higgs doublet model with
vectorlike leptons
|
16 pages, 6 figures
| null |
10.1007/JHEP05(2016)148
|
IU-HET-609
|
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In models with extended Higgs sector and additional matter fields, the decay
modes of heavy Higgs bosons can be dominated by cascade decays through the new
fermions rendering present search strategies ineffective. We investigate new
decay topologies of heavy neutral Higgses in two Higgs doublet model with
vectorlike leptons. We also discuss constraints from existing searches and
discovery prospects. Among the most interesting signatures are monojet, mono Z,
mono Higgs, and Z and Higgs bosons produced with a pair of charged leptons.
|
[
{
"created": "Thu, 24 Dec 2015 15:23:55 GMT",
"version": "v1"
},
{
"created": "Fri, 27 May 2016 00:29:51 GMT",
"version": "v2"
}
] |
2016-06-22
|
[
[
"Dermisek",
"Radovan",
""
],
[
"Lunghi",
"Enrico",
""
],
[
"Shin",
"Seodong",
""
]
] |
In models with extended Higgs sector and additional matter fields, the decay modes of heavy Higgs bosons can be dominated by cascade decays through the new fermions rendering present search strategies ineffective. We investigate new decay topologies of heavy neutral Higgses in two Higgs doublet model with vectorlike leptons. We also discuss constraints from existing searches and discovery prospects. Among the most interesting signatures are monojet, mono Z, mono Higgs, and Z and Higgs bosons produced with a pair of charged leptons.
|
2402.11232
|
Kun Wang
|
Kun Wang and Jingya Zhu
|
95 GeV light Higgs in the top-pair-associated diphoton channel at the
LHC in the minimal dilaton model
|
9 pages, 6 figures, 1 tables
|
Chin. Phys. C 48, no.7,073105 (2024)
|
10.1088/1674-1137/ad4268
| null |
hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
Motivated by experimental hints and theoretical frameworks indicating the
existence of an extended Higgs sector, we explore the feasibility of detecting
a 95 GeV light Higgs boson decaying into a diphoton within the minimal dilaton
model at the 14 TeV LHC. Initially, we identify the correlations between the
production cross section, decay branching ratios, and model parameters, e.g.,
the scalar mixing angle $\sin\theta_S$. Subsequently, we utilize Monte Carlo
simulations to generate the signal of the light Higgs boson via the $pp \to
t\bar{t}(s\to \gamma\gamma)$ process, along with the corresponding backgrounds.
To effectively separate the signal from the dominant backgrounds
$tt\gamma\gamma$, we employ a meticulous cut-based selection process.
Ultimately, we find that with an integrated luminosity of $L = 3000 {{~\rm
fb}^{-1}}$, the regions of $|\sin\theta_S|>0.2$ can be covered over the
$3\sigma$ level.
|
[
{
"created": "Sat, 17 Feb 2024 09:35:58 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Apr 2024 03:35:24 GMT",
"version": "v2"
},
{
"created": "Thu, 6 Jun 2024 16:48:11 GMT",
"version": "v3"
}
] |
2024-06-07
|
[
[
"Wang",
"Kun",
""
],
[
"Zhu",
"Jingya",
""
]
] |
Motivated by experimental hints and theoretical frameworks indicating the existence of an extended Higgs sector, we explore the feasibility of detecting a 95 GeV light Higgs boson decaying into a diphoton within the minimal dilaton model at the 14 TeV LHC. Initially, we identify the correlations between the production cross section, decay branching ratios, and model parameters, e.g., the scalar mixing angle $\sin\theta_S$. Subsequently, we utilize Monte Carlo simulations to generate the signal of the light Higgs boson via the $pp \to t\bar{t}(s\to \gamma\gamma)$ process, along with the corresponding backgrounds. To effectively separate the signal from the dominant backgrounds $tt\gamma\gamma$, we employ a meticulous cut-based selection process. Ultimately, we find that with an integrated luminosity of $L = 3000 {{~\rm fb}^{-1}}$, the regions of $|\sin\theta_S|>0.2$ can be covered over the $3\sigma$ level.
|
hep-ph/0702146
|
Kiwoon Choi
|
Kiwoon Choi and Hans Peter Nilles
|
The Gaugino Code
|
42 pages, Latex; a discussion of deflected anomaly mediation added,
references added
|
JHEP 0704:006,2007
|
10.1088/1126-6708/2007/04/006
| null |
hep-ph hep-ex hep-th
| null |
Gauginos might play a crucial role in the search for supersymmetry at the
Large Hadron Collider (LHC). Mass predictions for gauginos are rather robust
and often related to the values of the gauge couplings. We analyse the ratios
of gaugino masses in the LHC energy range for various schemes of supersymmetry
breakdown and mediation. Three distinct mass patterns emerge.
|
[
{
"created": "Wed, 14 Feb 2007 22:04:56 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Mar 2007 18:39:45 GMT",
"version": "v2"
}
] |
2010-10-27
|
[
[
"Choi",
"Kiwoon",
""
],
[
"Nilles",
"Hans Peter",
""
]
] |
Gauginos might play a crucial role in the search for supersymmetry at the Large Hadron Collider (LHC). Mass predictions for gauginos are rather robust and often related to the values of the gauge couplings. We analyse the ratios of gaugino masses in the LHC energy range for various schemes of supersymmetry breakdown and mediation. Three distinct mass patterns emerge.
|
hep-ph/0611154
|
George W. S. Hou
|
George W.S. Hou
|
Probing New Physics in $B_s$ and $D$ mixings, and $A_{\rm CP}(B^+ \to
J/\psi K^+)$
|
4 pages, 5 figures, presented at ICHEP 2006
| null |
10.1142/9789812790873_0255
| null |
hep-ph
| null |
A 4th generation could be consistent with the recently measured $\Delta
m_{B_s}$ as well as ${\cal B}(b\to s\ell^+\ell^-)$, which are SM-like, but
generate large $\sin2\Phi_{B_s} \simeq -0.5$ to -0.7. The sign is determined by
the hint for New Physics in CPV measurements in charmless B decays. The
$4\times 4$ unitarity allows one to connect to all processes involving flavor.
Fixing $V_{t'b}$, $V_{t's}$ and $V_{t'd}$ by $Z\to b\bar b$, $b\to s$ and $s\to
d$ processes, we predict $D$ mixing to be close to the current bound. As a
further corollary, we suggest that $A_{\rm CP}(B^+ \to J/\psi K^+)$ could be at
1% level or higher, where we give plausibility of an associated strong phase.
Our predictions can be tested in the near future.
|
[
{
"created": "Sat, 11 Nov 2006 08:07:28 GMT",
"version": "v1"
}
] |
2017-08-23
|
[
[
"Hou",
"George W. S.",
""
]
] |
A 4th generation could be consistent with the recently measured $\Delta m_{B_s}$ as well as ${\cal B}(b\to s\ell^+\ell^-)$, which are SM-like, but generate large $\sin2\Phi_{B_s} \simeq -0.5$ to -0.7. The sign is determined by the hint for New Physics in CPV measurements in charmless B decays. The $4\times 4$ unitarity allows one to connect to all processes involving flavor. Fixing $V_{t'b}$, $V_{t's}$ and $V_{t'd}$ by $Z\to b\bar b$, $b\to s$ and $s\to d$ processes, we predict $D$ mixing to be close to the current bound. As a further corollary, we suggest that $A_{\rm CP}(B^+ \to J/\psi K^+)$ could be at 1% level or higher, where we give plausibility of an associated strong phase. Our predictions can be tested in the near future.
|
2211.13384
|
Chrisna Setyo Nugroho
|
M. Afif Ismail, Chrisna Setyo Nugroho, and Henry Tsz-King Wong
|
Exploring dark photons via a subfrequency laser searchin gravitational
wave detectors
|
5 figures, 1 table
| null |
10.1103/PhysRevD.107.082002
| null |
hep-ph
|
http://creativecommons.org/licenses/by-nc-sa/4.0/
|
We propose a novel idea to detect a dark photon in gravitational wave
experiments. Our setups are capable of performing the whole process of dark
photon production, its decay products, and new physics signal discovery. This
mini-LHC is inspired by the recent idea of dark photon detection using laser
light in light shining through the wall (LSW) experiments such as ALPS II.
Taking the subfrequency light emitted from the laser source as the new physics
signal, we show that the sensitivity of our proposal is 2orders of magnitude
better than the original idea in the LSW studies.
|
[
{
"created": "Thu, 24 Nov 2022 02:32:15 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Apr 2023 09:30:56 GMT",
"version": "v2"
}
] |
2023-04-18
|
[
[
"Ismail",
"M. Afif",
""
],
[
"Nugroho",
"Chrisna Setyo",
""
],
[
"Wong",
"Henry Tsz-King",
""
]
] |
We propose a novel idea to detect a dark photon in gravitational wave experiments. Our setups are capable of performing the whole process of dark photon production, its decay products, and new physics signal discovery. This mini-LHC is inspired by the recent idea of dark photon detection using laser light in light shining through the wall (LSW) experiments such as ALPS II. Taking the subfrequency light emitted from the laser source as the new physics signal, we show that the sensitivity of our proposal is 2orders of magnitude better than the original idea in the LSW studies.
|
1810.11035
|
Sebastian Dumitru
|
Sebastian Dumitru, Burt A. Ovrut and Austin Purves
|
The $R$-parity Violating Decays of Charginos and Neutralinos in the B-L
MSSM
|
62 pages, 12 figures, added references in section 1, corrected some
calculation errors
|
JHEP 1902 (2019) 124
|
10.1007/JHEP02(2019)124
| null |
hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The $B-L$ MSSM is the MSSM with three right-handed neutrino chiral multiplets
and gauged $B-L$ symmetry. The $B-L$ symmetry is broken by the third family
right-handed sneutrino acquiring a VEV, thus spontaneously breaking $R$-parity.
Within a natural range of soft supersymmetry breaking parameters, it is shown
that a large and uncorrelated number of initial values satisfy all present
phenomenological constraints; including the correct masses for the $W^{\pm}$,
$Z^0$ bosons, having all sparticles exceeding their present lower bounds and
giving the experimentally measured value for the Higgs boson. For this "valid"
set of initial values, there are a number of different LSPs, each occurring a
calculable number of times. We plot this statistically and determine that among
the most prevalent LSPs are chargino and neutralino mass eigenstates. In this
paper, the $R$-parity violating decay channels of charginos and neutralinos to
standard model particles are determined, and the interaction vertices and decay
rates computed analytically. These results are valid for any chargino and
neutralino, regardless of whether or not they are the LSP. For chargino and
neutralino LSPs, we will-- in a subsequent series of papers --present a
numerical study of their RPV decays evaluated statistically over the range of
associated valid initial points.
|
[
{
"created": "Thu, 25 Oct 2018 18:00:57 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Mar 2019 19:01:50 GMT",
"version": "v2"
},
{
"created": "Sun, 2 Jun 2019 02:16:39 GMT",
"version": "v3"
}
] |
2019-06-04
|
[
[
"Dumitru",
"Sebastian",
""
],
[
"Ovrut",
"Burt A.",
""
],
[
"Purves",
"Austin",
""
]
] |
The $B-L$ MSSM is the MSSM with three right-handed neutrino chiral multiplets and gauged $B-L$ symmetry. The $B-L$ symmetry is broken by the third family right-handed sneutrino acquiring a VEV, thus spontaneously breaking $R$-parity. Within a natural range of soft supersymmetry breaking parameters, it is shown that a large and uncorrelated number of initial values satisfy all present phenomenological constraints; including the correct masses for the $W^{\pm}$, $Z^0$ bosons, having all sparticles exceeding their present lower bounds and giving the experimentally measured value for the Higgs boson. For this "valid" set of initial values, there are a number of different LSPs, each occurring a calculable number of times. We plot this statistically and determine that among the most prevalent LSPs are chargino and neutralino mass eigenstates. In this paper, the $R$-parity violating decay channels of charginos and neutralinos to standard model particles are determined, and the interaction vertices and decay rates computed analytically. These results are valid for any chargino and neutralino, regardless of whether or not they are the LSP. For chargino and neutralino LSPs, we will-- in a subsequent series of papers --present a numerical study of their RPV decays evaluated statistically over the range of associated valid initial points.
|
hep-ph/9702278
|
Fabrizio Gabbiani
|
John F. Donoghue and Fabrizio Gabbiani (University of Massachusetts at
Amherst)
|
K_L -> pi0 gamma e+ e- and its relation to CP and chiral tests
|
Some misprints corrected, results unchanged. 12 pages, 7 eps figures.
Version accepted for publication on Phys, Rev. D. LaTeX, uses epsf.sty and
rotate.sty
|
Phys.Rev. D56 (1997) 1605-1611
|
10.1103/PhysRevD.56.1605
| null |
hep-ph
| null |
The decay K_L -> pi0 gamma e+ e- occurs at a it higher rate than the
nonradiative process K_L -> pi0 e+ e-, and hence can be a background to CP
violation studies using the latter reaction. It also has an interest in its own
right in the context of chiral perturbation theory, through its relation to the
decay K_L -> pi0 gamma gamma. The leading order chiral loop contribution to K_L
-> pi0 gamma e+ e-, including the [q(e+) + q(e-)]^2/m^2(pi) dependence, is
completely calculable. We present this result and also include the higher order
modifications which are required in the analysis of K_L -> pi0 gamma gamma.
|
[
{
"created": "Thu, 6 Feb 1997 19:53:33 GMT",
"version": "v1"
},
{
"created": "Sat, 8 Feb 1997 03:26:54 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Jun 1997 19:37:02 GMT",
"version": "v3"
}
] |
2009-10-30
|
[
[
"Donoghue",
"John F.",
"",
"University of Massachusetts at\n Amherst"
],
[
"Gabbiani",
"Fabrizio",
"",
"University of Massachusetts at\n Amherst"
]
] |
The decay K_L -> pi0 gamma e+ e- occurs at a it higher rate than the nonradiative process K_L -> pi0 e+ e-, and hence can be a background to CP violation studies using the latter reaction. It also has an interest in its own right in the context of chiral perturbation theory, through its relation to the decay K_L -> pi0 gamma gamma. The leading order chiral loop contribution to K_L -> pi0 gamma e+ e-, including the [q(e+) + q(e-)]^2/m^2(pi) dependence, is completely calculable. We present this result and also include the higher order modifications which are required in the analysis of K_L -> pi0 gamma gamma.
|
0911.1964
|
Leonard Gamberg
|
Leonard Gamberg and Marc Schlegel
|
Final state interactions and the transverse structure of the pion using
non-perturbative eikonal methods
|
To appear in Phys.Lett.B, 9 pages, 5 figures, added refs. and
discussion
|
Phys.Lett.B685:95-103,2010
|
10.1016/j.physletb.2009.12.067
|
INT-PUB-09-056, JLAB-THY-09-1104
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the factorized picture of semi-inclusive hadronic processes the naive time
reversal-odd parton distributions exist by virtue of the gauge link which
renders it color gauge invariant. The link characterizes the dynamical effect
of initial/final-state interactions of the active parton due soft gluon
exchanges with the target remnant. Though these interactions are
non-perturbative, studies of final-state interaction have been approximated by
perturbative one-gluon approximation in Abelian models. We include higher-order
contributions by applying non-perturbative eikonal methods incorporating color
degrees of freedom in a calculation of the Boer-Mulders function of the pion.
Using this framework we explore under what conditions the Boer Mulders function
can be described in terms of factorization of final state interactions and a
spatial distribution in impact parameter space.
|
[
{
"created": "Tue, 10 Nov 2009 19:53:26 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Nov 2009 19:54:46 GMT",
"version": "v2"
},
{
"created": "Fri, 18 Dec 2009 18:15:07 GMT",
"version": "v3"
}
] |
2014-11-20
|
[
[
"Gamberg",
"Leonard",
""
],
[
"Schlegel",
"Marc",
""
]
] |
In the factorized picture of semi-inclusive hadronic processes the naive time reversal-odd parton distributions exist by virtue of the gauge link which renders it color gauge invariant. The link characterizes the dynamical effect of initial/final-state interactions of the active parton due soft gluon exchanges with the target remnant. Though these interactions are non-perturbative, studies of final-state interaction have been approximated by perturbative one-gluon approximation in Abelian models. We include higher-order contributions by applying non-perturbative eikonal methods incorporating color degrees of freedom in a calculation of the Boer-Mulders function of the pion. Using this framework we explore under what conditions the Boer Mulders function can be described in terms of factorization of final state interactions and a spatial distribution in impact parameter space.
|
hep-ph/9611268
| null |
L. Lavoura
|
Soft CP breaking and the strong-CP problem
|
4 pages Latex, no macros, one figure available from the author
| null | null |
FISIST/7-96/CFIF
|
hep-ph
| null |
I put forward a model with vectorlike isosinglet quarks in which soft
breaking of CP leads to strong CP violation only arising at two-loop level.
|
[
{
"created": "Thu, 7 Nov 1996 21:58:38 GMT",
"version": "v1"
}
] |
2009-09-25
|
[
[
"Lavoura",
"L.",
""
]
] |
I put forward a model with vectorlike isosinglet quarks in which soft breaking of CP leads to strong CP violation only arising at two-loop level.
|
hep-ph/0206121
|
Tilman Plehn
|
Tilman Plehn (UW Madison)
|
Charged Higgs Boson Production in Bottom-Gluon Fusion
|
18 pages, v2: some discussions added, v3: published version
|
Phys.Rev.D67:014018,2003
|
10.1103/PhysRevD.67.014018
| null |
hep-ph
| null |
We compute the complete next-to-leading order SUSY-QCD corrections for the
associated production of a charged Higgs boson with a top quark via
bottom-gluon fusion. We investigate the applicability of the bottom parton
description in detail. The higher order corrections can be split into real and
virtual corrections for a general two Higgs doublet model and into additional
massive supersymmetric loop contributions. We find that the perturbative
behavior is well under control. The supersymmetric contributions consist of the
universal bottom Yukawa coupling corrections and non-factorizable diagrams.
Over most of the relevant supersymmetric parameter space the Yukawa coupling
corrections are sizeable, while the remaining supersymmetric loop contributions
are negligible.
|
[
{
"created": "Thu, 13 Jun 2002 18:41:08 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Aug 2002 19:33:11 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Nov 2002 15:31:33 GMT",
"version": "v3"
}
] |
2009-07-09
|
[
[
"Plehn",
"Tilman",
"",
"UW Madison"
]
] |
We compute the complete next-to-leading order SUSY-QCD corrections for the associated production of a charged Higgs boson with a top quark via bottom-gluon fusion. We investigate the applicability of the bottom parton description in detail. The higher order corrections can be split into real and virtual corrections for a general two Higgs doublet model and into additional massive supersymmetric loop contributions. We find that the perturbative behavior is well under control. The supersymmetric contributions consist of the universal bottom Yukawa coupling corrections and non-factorizable diagrams. Over most of the relevant supersymmetric parameter space the Yukawa coupling corrections are sizeable, while the remaining supersymmetric loop contributions are negligible.
|
hep-ph/0505221
|
Gilad Perez
|
Haim Goldberg, Gilad Perez and Ina Sarcevic
|
Mini Z' Burst from Relic Supernova Neutrinos and Late Neutrino Masses
|
24 pages, 8 figures, version to be published in JHEP
|
JHEP 0611:023,2006
|
10.1088/1126-6708/2006/11/023
|
LBNL-57632
|
hep-ph astro-ph hep-ex
| null |
In models in which neutrinos are light, due to a low scale of symmetry
breaking, additional light bosons are generically present. We show that the
interaction between diffuse relic supernova neutrinos (RSN) and the cosmic
background neutrinos, via exchange of these light scalars, can result in a
dramatic change of the supernova (SN) neutrinos flux. Measurement of this
effect with current or future experiments can provide a spectacular direct
evidence for the low scale models. We demonstrate how the observation of
neutrinos from SN1987A constrains the symmetry breaking scale of the above
models. We also discuss how current and future experiments may confirm or
further constrain the above models, either by detecting the ``accumulative
resonance'' that diffuse RSN go through or via a large suppression of the flux
of neutrinos from nearby < O(Mpc) SN bursts.
|
[
{
"created": "Wed, 25 May 2005 20:24:18 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Mar 2006 18:27:06 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Nov 2006 21:34:39 GMT",
"version": "v3"
}
] |
2014-11-18
|
[
[
"Goldberg",
"Haim",
""
],
[
"Perez",
"Gilad",
""
],
[
"Sarcevic",
"Ina",
""
]
] |
In models in which neutrinos are light, due to a low scale of symmetry breaking, additional light bosons are generically present. We show that the interaction between diffuse relic supernova neutrinos (RSN) and the cosmic background neutrinos, via exchange of these light scalars, can result in a dramatic change of the supernova (SN) neutrinos flux. Measurement of this effect with current or future experiments can provide a spectacular direct evidence for the low scale models. We demonstrate how the observation of neutrinos from SN1987A constrains the symmetry breaking scale of the above models. We also discuss how current and future experiments may confirm or further constrain the above models, either by detecting the ``accumulative resonance'' that diffuse RSN go through or via a large suppression of the flux of neutrinos from nearby < O(Mpc) SN bursts.
|
1101.5808
|
Joaquim Silva-Marcos
|
G.C. Branco, H.R. Cola\c{c}o Ferreira, A.G. Hessler and J.I.
Silva-Marcos
|
Universality of Strength of Yukawa Couplings, Quark Singlets and
Strength of CP Violation
|
9 pages, no figures
| null |
10.1007/JHEP05(2012)001
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analyse the strength of CP violation in an extension of the standard model
with an extra $Q=-1/3$ vector-like singlet quark, in the framework of the
hypothesis of universality of strength of Yukawa couplings connecting standard
quarks. We show that the correct pattern of quark masses and mixing can be
obtained, including the observed strength of CP violation.
|
[
{
"created": "Sun, 30 Jan 2011 19:44:20 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Jul 2013 09:22:16 GMT",
"version": "v2"
}
] |
2013-07-02
|
[
[
"Branco",
"G. C.",
""
],
[
"Ferreira",
"H. R. Colaço",
""
],
[
"Hessler",
"A. G.",
""
],
[
"Silva-Marcos",
"J. I.",
""
]
] |
We analyse the strength of CP violation in an extension of the standard model with an extra $Q=-1/3$ vector-like singlet quark, in the framework of the hypothesis of universality of strength of Yukawa couplings connecting standard quarks. We show that the correct pattern of quark masses and mixing can be obtained, including the observed strength of CP violation.
|
hep-ph/0106258
|
John Bahcall
|
John N. Bahcall, M. C. Gonzalez-Garcia, Carlos Pena-Garay
|
Global Analysis of Solar Neutrino Oscillations Including SNO CC
Measurement
|
9 figures, higher resolution versions at http://www.sns.ias.edu/~jnb,
added references and clarifications
|
JHEP 0108:014,2001
|
10.1088/1126-6708/2001/08/014
| null |
hep-ph astro-ph hep-ex nucl-ex nucl-th
| null |
For active and sterile neutrinos, we present the globally allowed solutions
for two neutrino oscillations. We include the SNO CC measurement and all other
relevant solar neutrino and reactor data. Five active neutrino oscillation
solutions (LMA, LOW, SMA, VAC, and Just So2) are currently allowed at 3 sigma;
three sterile neutrino solutions (Just So2, SMA, and VAC) are allowed at 3
sigma. The goodness of fit is satisfactory for all eight solutions. We also
investigate the robustness of the allowed solutions by carrying out global
analyses with and without: 1) imposing solar model constraints on the 8B
neutrino flux, 2) including the Super-Kamiokande spectral energy distribution
and day-night data, 3) including a continuous mixture of active and sterile
neutrinos, 4) using an enhanced CC cross section for deuterium (due to
radiative corrections), and 5) a optimistic, hypothetical reduction by a factor
of three of the error of the SNO CC rate. For every analysis strategy used in
this paper, the most favored solutions all involve large mixing angles: LMA,
LOW, or VAC. The favored solutions are robust, but the presence at 3 sigma of
individual sterile solutions and the active Just So2 solution is sensitive to
the analysis assumptions.
|
[
{
"created": "Mon, 25 Jun 2001 21:48:35 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Jul 2001 00:41:50 GMT",
"version": "v2"
},
{
"created": "Sun, 29 Jul 2001 17:11:01 GMT",
"version": "v3"
},
{
"created": "Sat, 4 Aug 2001 17:58:27 GMT",
"version": "v4"
}
] |
2010-05-28
|
[
[
"Bahcall",
"John N.",
""
],
[
"Gonzalez-Garcia",
"M. C.",
""
],
[
"Pena-Garay",
"Carlos",
""
]
] |
For active and sterile neutrinos, we present the globally allowed solutions for two neutrino oscillations. We include the SNO CC measurement and all other relevant solar neutrino and reactor data. Five active neutrino oscillation solutions (LMA, LOW, SMA, VAC, and Just So2) are currently allowed at 3 sigma; three sterile neutrino solutions (Just So2, SMA, and VAC) are allowed at 3 sigma. The goodness of fit is satisfactory for all eight solutions. We also investigate the robustness of the allowed solutions by carrying out global analyses with and without: 1) imposing solar model constraints on the 8B neutrino flux, 2) including the Super-Kamiokande spectral energy distribution and day-night data, 3) including a continuous mixture of active and sterile neutrinos, 4) using an enhanced CC cross section for deuterium (due to radiative corrections), and 5) a optimistic, hypothetical reduction by a factor of three of the error of the SNO CC rate. For every analysis strategy used in this paper, the most favored solutions all involve large mixing angles: LMA, LOW, or VAC. The favored solutions are robust, but the presence at 3 sigma of individual sterile solutions and the active Just So2 solution is sensitive to the analysis assumptions.
|
1407.2607
|
Andrey Katz
|
Anson Hook and Andrey Katz
|
Unbroken $SU(2)$ at a 100 TeV collider
|
27 pages, 10 figures
| null |
10.1007/JHEP09(2014)175
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A future 100 TeV pp collider will explore energies much higher than the scale
of electroweak (EW) symmetry breaking. In this paper we study some of the
phenomenological consequences of this fact, concentrating on enhanced
bremsstrahlung of EW gauge bosons. We survey a handful of possible new physics
experimental searches one can pursue at a 100 TeV collider using this
phenomenon. The most dramatic effect is the non-negligible radiation of EW
gauge bosons from neutrinos, making them partly visible objects. The presence
of collinear EW radiation allows for the full reconstruction of neutrinos under
certain circumstances. We also show that the presence of EW radiation allows
one to distinguish the $SU(2)$ quantum numbers of various new physics
particles. We consider examples of two completely different new physics
paradigms, additional gauge groups and SUSY, where the bremsstrahlung radiation
of $W$ and $Z$ from $W'$s, $Z'$s or stops allows one to determine the couplings
and the mixing angles of the new particles (respectively). Finally, we show how
the emission of $W$s and $Z$s from high $p_T$ Higgs bosons can be used to test
the couplings of new physics to the Higgs boson.
|
[
{
"created": "Wed, 9 Jul 2014 20:00:04 GMT",
"version": "v1"
}
] |
2015-06-22
|
[
[
"Hook",
"Anson",
""
],
[
"Katz",
"Andrey",
""
]
] |
A future 100 TeV pp collider will explore energies much higher than the scale of electroweak (EW) symmetry breaking. In this paper we study some of the phenomenological consequences of this fact, concentrating on enhanced bremsstrahlung of EW gauge bosons. We survey a handful of possible new physics experimental searches one can pursue at a 100 TeV collider using this phenomenon. The most dramatic effect is the non-negligible radiation of EW gauge bosons from neutrinos, making them partly visible objects. The presence of collinear EW radiation allows for the full reconstruction of neutrinos under certain circumstances. We also show that the presence of EW radiation allows one to distinguish the $SU(2)$ quantum numbers of various new physics particles. We consider examples of two completely different new physics paradigms, additional gauge groups and SUSY, where the bremsstrahlung radiation of $W$ and $Z$ from $W'$s, $Z'$s or stops allows one to determine the couplings and the mixing angles of the new particles (respectively). Finally, we show how the emission of $W$s and $Z$s from high $p_T$ Higgs bosons can be used to test the couplings of new physics to the Higgs boson.
|
1711.10493
|
Monika Blanke
|
Monika Blanke, Satrajit Das, Simon Kast
|
Flavoured Dark Matter Moving Left
|
23 pages, 11 figures. v2: some clarifying comments and references
added, matches published version
|
JHEP 02 (2018) 105
|
10.1007/JHEP02(2018)105
|
TTP17-049
|
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We investigate the phenomenology of a simplified model of flavoured Dark
Matter (DM), with a dark fermionic flavour triplet coupling to the left-handed
$SU(2)_L$ quark doublets via a scalar mediator. The DM-quark coupling matrix is
assumed to constitute the only new source of flavour and CP violation,
following the hypothesis of Dark Minimal Flavour Violation. We analyse the
constraints from LHC searches, from meson mixing data in the $K$, $D$, and
$B_{d,s}$ meson systems, from thermal DM freeze-out, and from direct detection
experiments. Our combined analysis shows that while the experimental
constraints are similar to the DMFV models with DM coupling to right-handed
quarks, the multitude of couplings between DM and the SM quark sector resulting
from the $SU(2)_L$ structure implies a richer phenomenology and significantly
alters the resulting impact on the viable parameter space.
|
[
{
"created": "Tue, 28 Nov 2017 19:00:01 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Feb 2018 18:17:11 GMT",
"version": "v2"
}
] |
2018-02-19
|
[
[
"Blanke",
"Monika",
""
],
[
"Das",
"Satrajit",
""
],
[
"Kast",
"Simon",
""
]
] |
We investigate the phenomenology of a simplified model of flavoured Dark Matter (DM), with a dark fermionic flavour triplet coupling to the left-handed $SU(2)_L$ quark doublets via a scalar mediator. The DM-quark coupling matrix is assumed to constitute the only new source of flavour and CP violation, following the hypothesis of Dark Minimal Flavour Violation. We analyse the constraints from LHC searches, from meson mixing data in the $K$, $D$, and $B_{d,s}$ meson systems, from thermal DM freeze-out, and from direct detection experiments. Our combined analysis shows that while the experimental constraints are similar to the DMFV models with DM coupling to right-handed quarks, the multitude of couplings between DM and the SM quark sector resulting from the $SU(2)_L$ structure implies a richer phenomenology and significantly alters the resulting impact on the viable parameter space.
|
0906.2680
|
A. Tolga Tasci
|
A. T. Tasci and A. Senol
|
Searching for Single Production of Charged Heavy Leptons via Anomalous
Interactions at CLIC
|
14 pages, 9 figures
|
Arab. J. Sci. Eng.,38,(2013),195
|
10.1007/s13369-012-0405-0
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider the possible discovery potential for single production of charged
heavy leptons via anomalous interactions at the envisaged Compact Linear
Collider (CLIC) by taking into account initial state radiation (ISR) and
beamstrahlung effects. We calculate the production cross sections and decay
widths of charged heavy leptons in the context of anomalous interactions at
center of mass energies $\sqrt{s}=1$ and 3 TeV. The signal and corresponding
backgrounds are studied in detail for the mass range 300-1900 GeV.
|
[
{
"created": "Mon, 15 Jun 2009 13:52:13 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Jan 2013 08:05:20 GMT",
"version": "v2"
}
] |
2013-01-08
|
[
[
"Tasci",
"A. T.",
""
],
[
"Senol",
"A.",
""
]
] |
We consider the possible discovery potential for single production of charged heavy leptons via anomalous interactions at the envisaged Compact Linear Collider (CLIC) by taking into account initial state radiation (ISR) and beamstrahlung effects. We calculate the production cross sections and decay widths of charged heavy leptons in the context of anomalous interactions at center of mass energies $\sqrt{s}=1$ and 3 TeV. The signal and corresponding backgrounds are studied in detail for the mass range 300-1900 GeV.
|
1209.6359
|
Enrico Bertuzzo Dr
|
Enrico Bertuzzo, Pedro A. N. Machado, Renata Zukanovich Funchal
|
Can New Colored Particles Illuminate the Higgs?
|
18 pages, 7 figures. v2: typos fixed, references added, small
improvements made
| null |
10.1007/JHEP02(2013)086
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analyze the behavior of Higgs to diphoton rate and Higgs gluon-gluon
production cross section in minimal extensions of the Standard Model comprising
new colored vector-like fermions that do not mix with the ordinary ones. We
compare these information with constraints coming from electroweak precision
measurements. We compute pair production cross sections for the lightest
fermion and discuss the LHC bounds. Finally, we study the phenomenology of
possible quarkonium states composed by these new colored fermions.
|
[
{
"created": "Thu, 27 Sep 2012 20:00:07 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Oct 2012 22:00:38 GMT",
"version": "v2"
}
] |
2015-06-11
|
[
[
"Bertuzzo",
"Enrico",
""
],
[
"Machado",
"Pedro A. N.",
""
],
[
"Funchal",
"Renata Zukanovich",
""
]
] |
We analyze the behavior of Higgs to diphoton rate and Higgs gluon-gluon production cross section in minimal extensions of the Standard Model comprising new colored vector-like fermions that do not mix with the ordinary ones. We compare these information with constraints coming from electroweak precision measurements. We compute pair production cross sections for the lightest fermion and discuss the LHC bounds. Finally, we study the phenomenology of possible quarkonium states composed by these new colored fermions.
|
hep-ph/0402228
|
Heinrich P\"as
|
Heinrich P\"as (W\"urzburg), Thomas W. Kephart (Vanderbilt)
|
Classification of SUSY and non-SUSY Chiral Models from Abelian Orbifolds
AdS/CFT
|
12 pages, no figure
|
Phys.Rev.D70:086009,2004
|
10.1103/PhysRevD.70.086009
|
WUE-ITP-2003-010
|
hep-ph
| null |
We classify compactifications of the type IIB superstring on AdS_{5} x
S^{5}/\Gamma, where \Gamma is an abelian group of order n<= 12. Appropriate
embedding of \Gamma in the isometry of S^5 yields both SUSY and non-SUSY chiral
models that can contain the minimal SUSY standard model or the standard model.
New non-SUSY three family models with \Gamma=Z_8 are introduced, which lead to
the right Weinberg angle for TeV trinification.
|
[
{
"created": "Sun, 22 Feb 2004 16:43:55 GMT",
"version": "v1"
}
] |
2014-11-17
|
[
[
"Päs",
"Heinrich",
"",
"Würzburg"
],
[
"Kephart",
"Thomas W.",
"",
"Vanderbilt"
]
] |
We classify compactifications of the type IIB superstring on AdS_{5} x S^{5}/\Gamma, where \Gamma is an abelian group of order n<= 12. Appropriate embedding of \Gamma in the isometry of S^5 yields both SUSY and non-SUSY chiral models that can contain the minimal SUSY standard model or the standard model. New non-SUSY three family models with \Gamma=Z_8 are introduced, which lead to the right Weinberg angle for TeV trinification.
|
1212.2113
|
Yuri V. Kovchegov
|
Yuri V. Kovchegov
|
Running Coupling Evolution for Diffractive Dissociation and the NLO
Odderon Intercept
|
4 pages, 1 figure; contains an original prediction embedded in the
Diffraction 2012 proceedings; v2: minor corrections included
| null |
10.1063/1.4802180
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We summarize the results of including running coupling corrections into the
nonlinear evolution equation for diffractive dissociation. We also document a
prediction that the NLO QCD odderon intercept is zero resulting from a
discussion at the Diffraction 2012 Workshop.
|
[
{
"created": "Mon, 10 Dec 2012 16:07:15 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Dec 2012 16:58:31 GMT",
"version": "v2"
}
] |
2015-06-12
|
[
[
"Kovchegov",
"Yuri V.",
""
]
] |
We summarize the results of including running coupling corrections into the nonlinear evolution equation for diffractive dissociation. We also document a prediction that the NLO QCD odderon intercept is zero resulting from a discussion at the Diffraction 2012 Workshop.
|
hep-ph/9612487
|
Antonio Ferrera
|
Antonio Ferrera (Consejo Superior de Investigaciones Cientificas,
Madrid)
|
Defect Formation in First Order Phase Transitions with Damping
|
10 Latex pages, 9 figures available on request
|
Phys.Rev. D57 (1998) 7130-7138
|
10.1103/PhysRevD.57.7130
| null |
hep-ph
| null |
Within the context of first order phase transitions in the early universe, we
study the influence of a coupling between the (global U(1)) scalar driving the
transition and the rest of the matter content of the theory. The effect of the
coupling on the scalar is simulated by introducing a damping term in its
equations of motion, as suggested by recent results in the electroweak phase
transition. After a preceeding paper, in which we studied the influence that
this coupling has in the dynamics of bubble collisions and topological defect
formation, we proceed in this paper to quantify the impact of this new effects
on the probability of defect creation per nucleating bubble.
|
[
{
"created": "Mon, 30 Dec 1996 16:04:32 GMT",
"version": "v1"
}
] |
2009-10-30
|
[
[
"Ferrera",
"Antonio",
"",
"Consejo Superior de Investigaciones Cientificas,\n Madrid"
]
] |
Within the context of first order phase transitions in the early universe, we study the influence of a coupling between the (global U(1)) scalar driving the transition and the rest of the matter content of the theory. The effect of the coupling on the scalar is simulated by introducing a damping term in its equations of motion, as suggested by recent results in the electroweak phase transition. After a preceeding paper, in which we studied the influence that this coupling has in the dynamics of bubble collisions and topological defect formation, we proceed in this paper to quantify the impact of this new effects on the probability of defect creation per nucleating bubble.
|
2210.13233
|
Wei Chao
|
Wei Chao, Mingjie Jin, Hai-Jun Li, Ying-Quan Peng
|
Axion-like Dark Matter from the Type-II Seesaw Mechanism
|
7+9 pages, 5 figures
| null | null |
HEP-BNU-2022-0002
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Although axion-like particles (ALPs) are popular dark matter candidates,
their mass generation mechanisms as well as cosmic thermal evolutions are still
unclear. In this letter, we propose a new mass generation mechanism of ALP
during the electroweak phase transition in the presence of the type-II seesaw
mechanism. As ALP gets mass uniquely at the electroweak scale, there is a
cutoff scale on the ALP oscillation temperature irrelevant to the specific mass
of ALP, which is a distinctive feature of this scenario. The ALP couples to the
active neutrinos, leaving the matter effect of neutrino oscillations in a dense
ALP environment as a smoking gun. As a by-product, the recent $W$-boson mass
anomaly observed by the CDF collaboration is also quoted by the TeV-scale
type-II seesaw. We explain three kinds of new physics phenomena are with one
stroke.
|
[
{
"created": "Mon, 24 Oct 2022 13:40:50 GMT",
"version": "v1"
}
] |
2022-10-25
|
[
[
"Chao",
"Wei",
""
],
[
"Jin",
"Mingjie",
""
],
[
"Li",
"Hai-Jun",
""
],
[
"Peng",
"Ying-Quan",
""
]
] |
Although axion-like particles (ALPs) are popular dark matter candidates, their mass generation mechanisms as well as cosmic thermal evolutions are still unclear. In this letter, we propose a new mass generation mechanism of ALP during the electroweak phase transition in the presence of the type-II seesaw mechanism. As ALP gets mass uniquely at the electroweak scale, there is a cutoff scale on the ALP oscillation temperature irrelevant to the specific mass of ALP, which is a distinctive feature of this scenario. The ALP couples to the active neutrinos, leaving the matter effect of neutrino oscillations in a dense ALP environment as a smoking gun. As a by-product, the recent $W$-boson mass anomaly observed by the CDF collaboration is also quoted by the TeV-scale type-II seesaw. We explain three kinds of new physics phenomena are with one stroke.
|
hep-ph/9906227
|
Yuji Koike
|
Yuji Koike (Niigata Univ.)
|
Twist-3 effects in polarized Drell-Yan and semi-inclusive DIS
|
Latex file 3 pages. Talk presented at DIS'99 (DESY-Zeuthen, April
19-23, 1999.)
|
Nucl.Phys.Proc.Suppl. 79 (1999) 626-628
|
10.1016/S0920-5632(99)00803-8
| null |
hep-ph
| null |
Two twist-3 processes are discussed. We first present a simple estimate of
the longitudinal-transverse spin asymmetry in the polarized Drell-Yan process.
We next derive a cross section for the semi-inclusive production of a polarized
spin-1/2 baryon in the DIS of an unpolarized electron off the polarized
nucleon.
|
[
{
"created": "Thu, 3 Jun 1999 14:21:00 GMT",
"version": "v1"
}
] |
2009-10-31
|
[
[
"Koike",
"Yuji",
"",
"Niigata Univ."
]
] |
Two twist-3 processes are discussed. We first present a simple estimate of the longitudinal-transverse spin asymmetry in the polarized Drell-Yan process. We next derive a cross section for the semi-inclusive production of a polarized spin-1/2 baryon in the DIS of an unpolarized electron off the polarized nucleon.
|
1711.02164
|
Leonard S. Kisslinger
|
Leonard S. Kisslinger, Bijit Singha
|
Charm, Bottom, Strange Baryon Masses Using QCD Sum Rules
|
89pages, 4 figures
|
Int. J. Modern Phys. A 33, 1850139 (2018)
|
10.1142/S0217751X18501397
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We use the method of QCD Sum Rules to estimate the masses of the charm
baryon, $\Lambda^+_c$, bottom baryon $\Lambda^0_b$, strange baryon
$\Lambda^0_s$ and compare them to their experimental values.
|
[
{
"created": "Mon, 6 Nov 2017 20:46:28 GMT",
"version": "v1"
},
{
"created": "Fri, 11 May 2018 20:15:07 GMT",
"version": "v2"
}
] |
2018-08-17
|
[
[
"Kisslinger",
"Leonard S.",
""
],
[
"Singha",
"Bijit",
""
]
] |
We use the method of QCD Sum Rules to estimate the masses of the charm baryon, $\Lambda^+_c$, bottom baryon $\Lambda^0_b$, strange baryon $\Lambda^0_s$ and compare them to their experimental values.
|
2211.11288
|
Mohammed Boukidi
|
Rachid Benbrik (1), Mohammed Boukidi (1) ((1) Polydisciplinary
Faculty, Laboratory of Fundamental and Applied Physics, Cadi Ayyad
University, Sidi Bouzid, Safi, Morocco)
|
Identifying light charged Higgs boson in the $\mu\nu$ channel in 2HDM
Type-III
|
6 pages, 2 figures, Contribution to The Tenth Annual Conference on
Large Hadron Collider Physics-LHCP2022
| null | null | null |
hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
In this contribution, we discuss the light charged Higgs boson production via
$pp \to \bar{t} bH^\pm$ at the Large Hadron Collider (LHC) in the Two-Higgs
Doublet Model (2HDM) Type-III. We explore the prospect of looking the
aforementioned Higgs boson production channel followed by $H^\pm\mu\nu$ signal.
The latter has the potential to be overwhelmingly stronger than $H^\pm\tau\nu$
and $H^\pm c\bar{s}$ signals in Type-III. We show that in both scenarios
standard and inverted hierarchy and after including several theoretical and
experimental constraints, the production process $pp \to \bar{t}bH^\pm$
followed by $H^\pm\to \mu\nu$ could represent the most promising experimental
option to search for light charged Higgs boson at the LHC.
|
[
{
"created": "Mon, 21 Nov 2022 09:29:46 GMT",
"version": "v1"
}
] |
2022-11-22
|
[
[
"Benbrik",
"Rachid",
""
],
[
"Boukidi",
"Mohammed",
""
]
] |
In this contribution, we discuss the light charged Higgs boson production via $pp \to \bar{t} bH^\pm$ at the Large Hadron Collider (LHC) in the Two-Higgs Doublet Model (2HDM) Type-III. We explore the prospect of looking the aforementioned Higgs boson production channel followed by $H^\pm\mu\nu$ signal. The latter has the potential to be overwhelmingly stronger than $H^\pm\tau\nu$ and $H^\pm c\bar{s}$ signals in Type-III. We show that in both scenarios standard and inverted hierarchy and after including several theoretical and experimental constraints, the production process $pp \to \bar{t}bH^\pm$ followed by $H^\pm\to \mu\nu$ could represent the most promising experimental option to search for light charged Higgs boson at the LHC.
|
1008.4783
|
Mocioiu Irina
|
Enrique Fernandez-Martinez, Gerardo Giordano, Olga Mena, Irina Mocioiu
|
Atmospheric neutrinos in ice and measurement of neutrino oscillation
parameters
|
expanded discussion of systematic uncertainties, 8 pages, 4 figures
|
Phys.Rev.D82:093011,2010
|
10.1103/PhysRevD.82.093011
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The main goal of the IceCube Deep Core Array is to search for neutrinos of
astrophysical origins. Atmospheric neutrinos are commonly considered as a
background for these searches. We show that the very high statistics
atmospheric neutrino data can be used to obtain precise measurements of the
main oscillation parameters.
|
[
{
"created": "Fri, 27 Aug 2010 18:54:48 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Oct 2010 18:08:39 GMT",
"version": "v2"
}
] |
2010-12-09
|
[
[
"Fernandez-Martinez",
"Enrique",
""
],
[
"Giordano",
"Gerardo",
""
],
[
"Mena",
"Olga",
""
],
[
"Mocioiu",
"Irina",
""
]
] |
The main goal of the IceCube Deep Core Array is to search for neutrinos of astrophysical origins. Atmospheric neutrinos are commonly considered as a background for these searches. We show that the very high statistics atmospheric neutrino data can be used to obtain precise measurements of the main oscillation parameters.
|
2006.08782
|
Craig Roberts
|
Craig D. Roberts and Sebastian M. Schmidt
|
Reflections upon the Emergence of Hadronic Mass
|
13 pages, 9 figures. Invited contribution to EPJ ST Issue "Strong
Correlations in Dense Matter Physics"
| null |
10.1140/epjst/e2020-000064-6
|
NJU-INP 018/20
|
hep-ph hep-ex hep-lat nucl-ex nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
With discovery of the Higgs boson, science has located the source for
$\lesssim 2$% of the mass of visible matter. The focus of attention can now
shift to the search for the origin of the remaining $\gtrsim 98$%. The
instruments at work here must be capable of simultaneously generating the 1 GeV
mass-scale associated with the nucleon and ensuring that this mass-scale is
completely hidden in the chiral-limit pion. This hunt for an understanding of
the emergence of hadronic mass (EHM) has actually been underway for many years.
What is changing are the impacts of QCD-related theory, through the elucidation
of clear signals for EHM in hadron observables, and the ability of modern and
planned experimental facilities to access these observables. These developments
are exemplified in a discussion of the evolving understanding of pion and kaon
parton distributions.
|
[
{
"created": "Mon, 15 Jun 2020 21:34:54 GMT",
"version": "v1"
}
] |
2021-02-03
|
[
[
"Roberts",
"Craig D.",
""
],
[
"Schmidt",
"Sebastian M.",
""
]
] |
With discovery of the Higgs boson, science has located the source for $\lesssim 2$% of the mass of visible matter. The focus of attention can now shift to the search for the origin of the remaining $\gtrsim 98$%. The instruments at work here must be capable of simultaneously generating the 1 GeV mass-scale associated with the nucleon and ensuring that this mass-scale is completely hidden in the chiral-limit pion. This hunt for an understanding of the emergence of hadronic mass (EHM) has actually been underway for many years. What is changing are the impacts of QCD-related theory, through the elucidation of clear signals for EHM in hadron observables, and the ability of modern and planned experimental facilities to access these observables. These developments are exemplified in a discussion of the evolving understanding of pion and kaon parton distributions.
|
hep-ph/9604350
|
Nestor Armesto Perez
|
M. A. Braun
|
On the triple pomeron contribution in the hard pomeron theory
|
LaTeX, 14 pages
| null | null |
US-FT/17-96
|
hep-ph
| null |
Within the hard pomeron approach it is shown that the triple pomeron
interaction gives no contribution to the cross-section for a projectile with
large enough virtuality $g^{2}\ln Q^{2}\sim 1$. For small virtualities
$g^{2}\ln Q^{2}<<1$ its contribution is essential.
|
[
{
"created": "Thu, 18 Apr 1996 13:00:54 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Braun",
"M. A.",
""
]
] |
Within the hard pomeron approach it is shown that the triple pomeron interaction gives no contribution to the cross-section for a projectile with large enough virtuality $g^{2}\ln Q^{2}\sim 1$. For small virtualities $g^{2}\ln Q^{2}<<1$ its contribution is essential.
|
1210.6849
|
Wolfgang Lucha
|
Irina Balakireva, Wolfgang Lucha, Dmitri Melikhov
|
Pseudoscalar-Meson Form Factors: A Fresh Look by QCD Sum Rules
|
3 pages, 3 figures, contributed to "Quark Confinement and the Hadron
Spectrum X" (8 - 12 October 2012, TUM Campus Garching, Munich, Germany), to
appear in the proceedings
| null | null |
HEPHY-PUB 919/12
|
hep-ph hep-ex nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Confronted with some surprising claims about experimentally measured or
theoretically expected dependencies on the involved momentum transfer of
various form factors of pseudoscalar mesons, we reassess the present status of
these quantities by means of QCD sum rules. This approach provides
well-developed and very efficient tools to relate in an analytical manner the
parameters of QCD to the empirical properties of hadrons. Within this
framework, we show that a few theoretical findings for the pion elastic form
factor and one experimental result for the pion-to-photon transition form
factor are at odds with rather general fundamental considerations.
|
[
{
"created": "Thu, 25 Oct 2012 14:18:06 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Oct 2012 14:55:38 GMT",
"version": "v2"
}
] |
2012-11-01
|
[
[
"Balakireva",
"Irina",
""
],
[
"Lucha",
"Wolfgang",
""
],
[
"Melikhov",
"Dmitri",
""
]
] |
Confronted with some surprising claims about experimentally measured or theoretically expected dependencies on the involved momentum transfer of various form factors of pseudoscalar mesons, we reassess the present status of these quantities by means of QCD sum rules. This approach provides well-developed and very efficient tools to relate in an analytical manner the parameters of QCD to the empirical properties of hadrons. Within this framework, we show that a few theoretical findings for the pion elastic form factor and one experimental result for the pion-to-photon transition form factor are at odds with rather general fundamental considerations.
|
0806.3254
|
Manimala Mitra
|
Manimala Mitra, Sandhya Choubey
|
Lepton Masses in a Minimal Model with Triplet Higgs Bosons and $S_3$
Flavor Symmetry
|
29 pages, 5 figures. Version to be appeared in PRD. Phenomenology of
Lepton flavor violation and possible collider signatures of this model have
been included
|
Phys.Rev.D78:115014,2008
|
10.1103/PhysRevD.78.115014
|
HRI-P-08-06-003
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Viable neutrino and charged lepton masses and mixings are obtained by
imposing a $S_3 \times Z_4 \times Z_3$ flavor symmetry in a model with a few
additional Higgs. We use two $SU(2)_L$ triplet Higgs which are arranged as a
doublet of $S_3$, and standard model singlet Higgs which are also put as
doublets of $S_3$. We break the $S_3$ symmetry in this minimal model by giving
vacuum expectation values (VEV) to the additional Higgs fields. Dictated by the
minimum condition for the scalar potential, we obtain certain VEV alignments
which allow us to maintain $\mu-\tau$ symmetry in the neutrino sector, while
breaking it maximally for the charged leptons. This helps us to simultaneously
explain the hierarchical charged lepton masses, and the neutrino masses and
mixings. In particular, we obtain maximal $\theta_{23}$ and zero $\theta_{13}$.
We allow for a mild breaking of the $\mu-\tau$ symmetry for the neutrinos and
study the phenomenology. We give predictions for $\theta_{13}$ and the CP
violating Jarlskog invariant $J_{CP}$, as a function of the $\mu-\tau$ symmetry
breaking parameter. We also discuss possible collider signatures and
phenomenology associated with lepton flavor violating processes.
|
[
{
"created": "Thu, 19 Jun 2008 17:58:41 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Sep 2008 12:58:17 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Dec 2008 06:36:43 GMT",
"version": "v3"
}
] |
2008-12-30
|
[
[
"Mitra",
"Manimala",
""
],
[
"Choubey",
"Sandhya",
""
]
] |
Viable neutrino and charged lepton masses and mixings are obtained by imposing a $S_3 \times Z_4 \times Z_3$ flavor symmetry in a model with a few additional Higgs. We use two $SU(2)_L$ triplet Higgs which are arranged as a doublet of $S_3$, and standard model singlet Higgs which are also put as doublets of $S_3$. We break the $S_3$ symmetry in this minimal model by giving vacuum expectation values (VEV) to the additional Higgs fields. Dictated by the minimum condition for the scalar potential, we obtain certain VEV alignments which allow us to maintain $\mu-\tau$ symmetry in the neutrino sector, while breaking it maximally for the charged leptons. This helps us to simultaneously explain the hierarchical charged lepton masses, and the neutrino masses and mixings. In particular, we obtain maximal $\theta_{23}$ and zero $\theta_{13}$. We allow for a mild breaking of the $\mu-\tau$ symmetry for the neutrinos and study the phenomenology. We give predictions for $\theta_{13}$ and the CP violating Jarlskog invariant $J_{CP}$, as a function of the $\mu-\tau$ symmetry breaking parameter. We also discuss possible collider signatures and phenomenology associated with lepton flavor violating processes.
|
2009.11046
|
Geza Zsigmond
|
C. Abel (a), N. J. Ayres (b), G. Ban (c), G. Bison (d), K. Bodek (e),
V. Bondar (b), E. Chanel (f), P.-J. Chiu (b, d), C. Crawford (g), M. Daum
(d), R. T. Dinani (h), S. Emmenegger (b), P. Flaux (c), L. Ferraris-Bouchez
(i), W. C. Griffith (a), Z. D. Grujic (j,1), N. Hild (b, d), K. Kirch (b, d),
H.-C. Koch (d), P.A. Koss (h), A. Kozela (k), J. Krempel (b), B. Lauss (d),
T. Lefort (c), A. Leredde (i), P. Mohanmurthy (b, d,2), O. Naviliat-Cuncic
(c), D. Pais (b, d), F. M. Piegsa (f), G. Pignol (i), M. Rawlik (b, d), D.
Rebreyend (i), I. Rienaecker (b, d), D. Ries (l), S. Roccia (i, m), D.
Rozpedzik (e), P. Schmidt-Wellenburg (d), N. Severijns (h), J. Thorne (f), A.
Weis (j), E. Wursten (h,3), J. Zejma (e) and G. Zsigmond (d) ((a) Department
of Physics and Astronomy, University of Sussex, Brighton, United Kingdom, (b)
Institute for Particle Physics and Astrophysics, ETH Z\"urich, Switzerland,
(c) Normandie Universit\'e, ENSICAEN, UNICAEN, CNRS/IN2P3, Caen, France, (d)
Paul Scherrer Institut, Switzerland, (e) Marian Smoluchowski Institute of
Physics, Jagiellonian University, Krak\'ow, Poland, (f) Laboratory for High
Energy Physics and Albert Einstein Center for Fundamental Physics, University
of Bern, Switzerland, (g) University of Kentucky, Lexington, KY, (h)
Institute for Nuclear and Radiation Physics, KU Leuven, Belgium, (i)
Laboratoire de Physique Subatomique et de Cosmologie, Universit\'e Grenoble
Alpes, CNRS/IN2P3, Grenoble, France, (j) University of Fribourg, Switzerland,
(k) Henryk Niedwodniczanski Institute of Nuclear Physics, Krak\'ow, Poland,
(l) Department of Chemistry - TRIGA site, Johannes Gutenberg University
Mainz, Germany, (m) Institut Laue-Langevin, Grenoble, France)
|
A search for neutron to mirror-neutron oscillations
|
Submitted to Physics Letters B, 9 pages, 3 figures
| null |
10.1016/j.physletb.2020.135993
| null |
hep-ph nucl-ex quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
It has been proposed that there could be a mirror copy of the standard model
particles, restoring the parity symmetry in the weak interaction on the global
level. Oscillations between a neutral standard model particle, such as the
neutron, and its mirror counterpart could potentially answer various standing
issues in physics today. Astrophysical studies and terrestrial experiments led
by ultracold neutron storage measurements have investigated neutron to
mirror-neutron oscillations and imposed constraints on the theoretical
parameters. Recently, further analysis of these ultracold neutron storage
experiments has yielded statistically significant anomalous signals that may be
interpreted as neutron to mirror-neutron oscillations, assuming nonzero mirror
magnetic fields. The neutron electric dipole moment collaboration performed a
dedicated search at the Paul Scherrer Institute and found no evidence of
neutron to mirror-neutron oscillations. Thereby, the following new lower limits
on the oscillation time were obtained: $\tau_{nn'} > 352~$s at $B'=0$ (95%
C.L.), $\tau_{nn'} > 6~\text{s}$ for all $0.4~\mu\text{T}<B'<25.7~\mu\text{T}$
(95% C.L.), and $\tau_{nn'}/\sqrt{\cos\beta}>9~\text{s}$ for all
$5.0~\mu\text{T}<B'<25.4~\mu\text{T}$ (95% C.L.), where $\beta$ is the fixed
angle between the applied magnetic field and the local mirror magnetic field
which is assumed to be bound to the Earth. These new constraints are the best
measured so far around $B'\sim10~\mu$T, and $B'\sim20~\mu$T.
|
[
{
"created": "Wed, 23 Sep 2020 10:43:20 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Nov 2020 18:48:09 GMT",
"version": "v2"
}
] |
2020-12-09
|
[
[
"Abel",
"C.",
"",
"a"
],
[
"Ayres",
"N. J.",
"",
"b"
],
[
"Ban",
"G.",
"",
"c"
],
[
"Bison",
"G.",
"",
"d"
],
[
"Bodek",
"K.",
"",
"e"
],
[
"Bondar",
"V.",
"",
"b"
],
[
"Chanel",
"E.",
"",
"f"
],
[
"Chiu",
"P. -J.",
"",
"b, d"
],
[
"Crawford",
"C.",
"",
"g"
],
[
"Daum",
"M.",
"",
"d"
],
[
"Dinani",
"R. T.",
"",
"h"
],
[
"Emmenegger",
"S.",
"",
"b"
],
[
"Flaux",
"P.",
"",
"c"
],
[
"Ferraris-Bouchez",
"L.",
"",
"i"
],
[
"Griffith",
"W. C.",
"",
"a"
],
[
"Grujic",
"Z. D.",
"",
"j,1"
],
[
"Hild",
"N.",
"",
"b, d"
],
[
"Kirch",
"K.",
"",
"b, d"
],
[
"Koch",
"H. -C.",
"",
"d"
],
[
"Koss",
"P. A.",
"",
"h"
],
[
"Kozela",
"A.",
"",
"k"
],
[
"Krempel",
"J.",
"",
"b"
],
[
"Lauss",
"B.",
"",
"d"
],
[
"Lefort",
"T.",
"",
"c"
],
[
"Leredde",
"A.",
"",
"i"
],
[
"Mohanmurthy",
"P.",
"",
"b, d,2"
],
[
"Naviliat-Cuncic",
"O.",
"",
"c"
],
[
"Pais",
"D.",
"",
"b, d"
],
[
"Piegsa",
"F. M.",
"",
"f"
],
[
"Pignol",
"G.",
"",
"i"
],
[
"Rawlik",
"M.",
"",
"b, d"
],
[
"Rebreyend",
"D.",
"",
"i"
],
[
"Rienaecker",
"I.",
"",
"b, d"
],
[
"Ries",
"D.",
"",
"l"
],
[
"Roccia",
"S.",
"",
"i, m"
],
[
"Rozpedzik",
"D.",
"",
"e"
],
[
"Schmidt-Wellenburg",
"P.",
"",
"d"
],
[
"Severijns",
"N.",
"",
"h"
],
[
"Thorne",
"J.",
"",
"f"
],
[
"Weis",
"A.",
"",
"j"
],
[
"Wursten",
"E.",
"",
"h,3"
],
[
"Zejma",
"J.",
"",
"e"
],
[
"Zsigmond",
"G.",
"",
"d"
]
] |
It has been proposed that there could be a mirror copy of the standard model particles, restoring the parity symmetry in the weak interaction on the global level. Oscillations between a neutral standard model particle, such as the neutron, and its mirror counterpart could potentially answer various standing issues in physics today. Astrophysical studies and terrestrial experiments led by ultracold neutron storage measurements have investigated neutron to mirror-neutron oscillations and imposed constraints on the theoretical parameters. Recently, further analysis of these ultracold neutron storage experiments has yielded statistically significant anomalous signals that may be interpreted as neutron to mirror-neutron oscillations, assuming nonzero mirror magnetic fields. The neutron electric dipole moment collaboration performed a dedicated search at the Paul Scherrer Institute and found no evidence of neutron to mirror-neutron oscillations. Thereby, the following new lower limits on the oscillation time were obtained: $\tau_{nn'} > 352~$s at $B'=0$ (95% C.L.), $\tau_{nn'} > 6~\text{s}$ for all $0.4~\mu\text{T}<B'<25.7~\mu\text{T}$ (95% C.L.), and $\tau_{nn'}/\sqrt{\cos\beta}>9~\text{s}$ for all $5.0~\mu\text{T}<B'<25.4~\mu\text{T}$ (95% C.L.), where $\beta$ is the fixed angle between the applied magnetic field and the local mirror magnetic field which is assumed to be bound to the Earth. These new constraints are the best measured so far around $B'\sim10~\mu$T, and $B'\sim20~\mu$T.
|
hep-ph/0608054
|
Subhendu Rakshit
|
S. Rakshit and E. Reya
|
On the transport equations of cosmic neutrinos passing through Earth and
secondary nu_mu fluxes
|
Version to appear in PRD
|
Phys.Rev.D74:103006,2006
|
10.1103/PhysRevD.74.103006
|
DO-TH 06/05
|
hep-ph
| null |
The convergence of the iterative solutions of the transport equations of
cosmic muon and tau neutrinos propagating through Earth is studied and
analyzed. For achieving a fast convergence of the iterative solutions of the
coupled transport equations of nu_tau, nubar_tau and the associated tau^{\pm}
fluxes, a new semi-analytic input algorithm is presented where the peculiar
tau-decay contributions are implemented already in the initial zeroth order
input. Furthermore, the common single transport equation for muon neutrinos is
generalized by taking into account the contributions of secondary nu_mu and
nubar_mu fluxes due to the prompt tau-decay tau -> nu_mu initiated by the
associated tau flux. Differential and total nadir angle integrated upward-going
mu^- + mu^+ event rates are presented for underground neutrino telescopes and
compared with the muon rates initiated by the primary nu_mu, nu_tau and tau
fluxes.
|
[
{
"created": "Fri, 4 Aug 2006 13:54:14 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Oct 2006 14:48:21 GMT",
"version": "v2"
}
] |
2008-11-26
|
[
[
"Rakshit",
"S.",
""
],
[
"Reya",
"E.",
""
]
] |
The convergence of the iterative solutions of the transport equations of cosmic muon and tau neutrinos propagating through Earth is studied and analyzed. For achieving a fast convergence of the iterative solutions of the coupled transport equations of nu_tau, nubar_tau and the associated tau^{\pm} fluxes, a new semi-analytic input algorithm is presented where the peculiar tau-decay contributions are implemented already in the initial zeroth order input. Furthermore, the common single transport equation for muon neutrinos is generalized by taking into account the contributions of secondary nu_mu and nubar_mu fluxes due to the prompt tau-decay tau -> nu_mu initiated by the associated tau flux. Differential and total nadir angle integrated upward-going mu^- + mu^+ event rates are presented for underground neutrino telescopes and compared with the muon rates initiated by the primary nu_mu, nu_tau and tau fluxes.
|
hep-ph/0010259
|
Daniel Litim
|
Daniel F. Litim
|
Aspects of semi-classical transport theory for QCD
|
Presented at Strong and Electroweak Matter (SEWM2000), Marseille,
France, 14-17 June 2000, 12 pages
| null |
10.1142/9789812799913_0006
|
CERN-TH/2000-310
|
hep-ph
| null |
We discuss some aspects of a recently proposed semi-classical transport
theory for QCD plasmas based on coloured point particles. This includes the
derivation of effective transport equations for mean fields and fluctuations
which relies on the Gibbs ensemble average. Correlators of fluctuations are
interpreted as collision integrals for the effective Boltzmann equation. The
approach yields a recipe to integrate-out fluctuations. Systematic
approximations (first moment, second moment, polarisation approximation) based
on a small plasma parameter are discussed as well. Finally, the application to
a hot non-Abelian plasma close to thermal equilibrium is considered and the
consistency with the fluctuation-dissipation theorem established.
|
[
{
"created": "Sun, 22 Oct 2000 11:37:10 GMT",
"version": "v1"
}
] |
2017-08-23
|
[
[
"Litim",
"Daniel F.",
""
]
] |
We discuss some aspects of a recently proposed semi-classical transport theory for QCD plasmas based on coloured point particles. This includes the derivation of effective transport equations for mean fields and fluctuations which relies on the Gibbs ensemble average. Correlators of fluctuations are interpreted as collision integrals for the effective Boltzmann equation. The approach yields a recipe to integrate-out fluctuations. Systematic approximations (first moment, second moment, polarisation approximation) based on a small plasma parameter are discussed as well. Finally, the application to a hot non-Abelian plasma close to thermal equilibrium is considered and the consistency with the fluctuation-dissipation theorem established.
|
2011.02484
|
Zhengkang Zhang
|
Timothy Cohen, Xiaochuan Lu, Zhengkang Zhang
|
Functional Prescription for EFT Matching
|
28 pages + appendices, 1 figure, 4 tables
| null |
10.1007/JHEP02(2021)228
|
CALT-TH-2020-047
|
hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We simplify the one-loop functional matching formalism to develop a
streamlined prescription. The functional approach is conceptually appealing:
all calculations are performed within the UV theory at the matching scale, and
no prior determination of an Effective Field Theory (EFT) operator basis is
required. Our prescription accommodates any relativistic UV theory that
contains generic interactions (including derivative couplings) among scalar,
fermion, and vector fields. As an example application, we match the singlet
scalar extended Standard Model (SM) onto SMEFT.
|
[
{
"created": "Wed, 4 Nov 2020 19:00:01 GMT",
"version": "v1"
}
] |
2021-03-17
|
[
[
"Cohen",
"Timothy",
""
],
[
"Lu",
"Xiaochuan",
""
],
[
"Zhang",
"Zhengkang",
""
]
] |
We simplify the one-loop functional matching formalism to develop a streamlined prescription. The functional approach is conceptually appealing: all calculations are performed within the UV theory at the matching scale, and no prior determination of an Effective Field Theory (EFT) operator basis is required. Our prescription accommodates any relativistic UV theory that contains generic interactions (including derivative couplings) among scalar, fermion, and vector fields. As an example application, we match the singlet scalar extended Standard Model (SM) onto SMEFT.
|
hep-ph/0001279
|
Mircea Pentia
|
M.Pentia (on behalf of the DIRAC Collaboration)
|
DIRAC Experiment and Test of Low-Energy QCD
|
10 pages, 8 figures, presented at the International Symposium
"Advances in Nuclear Physics", December 9-10, 1999, Bucharest, Romania
| null | null | null |
hep-ph
| null |
The low-energy QCD predictions to be tested by the DIRAC experiment are
revised. The experimental method, the setup characteristics and capabilities,
along with first experimental results are reported. Preliminary analysis shows
good detector performance: alignment error via $\Lambda$ mass measurement
$m_\Lambda = 1115.6 MeV/c^2$ with $\sigma = 0.92 MeV/c^2$, $p \pi^-$ relative
momentum resolution $\sigma_Q \approx 2.7 MeV/c$, and evidence for $\pi^+
\pi^-$ low momentum Coulomb correlation.
|
[
{
"created": "Thu, 27 Jan 2000 14:22:36 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Pentia",
"M.",
"",
"on behalf of the DIRAC Collaboration"
]
] |
The low-energy QCD predictions to be tested by the DIRAC experiment are revised. The experimental method, the setup characteristics and capabilities, along with first experimental results are reported. Preliminary analysis shows good detector performance: alignment error via $\Lambda$ mass measurement $m_\Lambda = 1115.6 MeV/c^2$ with $\sigma = 0.92 MeV/c^2$, $p \pi^-$ relative momentum resolution $\sigma_Q \approx 2.7 MeV/c$, and evidence for $\pi^+ \pi^-$ low momentum Coulomb correlation.
|
1705.07299
|
Mikhail Ivanov
|
Thomas Gutsche, Mikhail A. Ivanov, J\"urgen G. K\"orner, Valery E.
Lyubovitskij, Vladimir V. Lyubushkin and Pietro Santorelli
|
Theoretical description of the decays $\Lambda_b \to
\Lambda^{(\ast)}(\frac12^\pm,\frac32^\pm) + J/\psi$
|
15 pages, 4 figures. Minor corrections done
|
Phys. Rev. D 96, 013003 (2017)
|
10.1103/PhysRevD.96.013003
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We calculate the invariant and helicity amplitudes for the transitions
$\Lambda_b~\to~\Lambda^{(\ast)}(J^P)~+~J/\psi$ where the
$\Lambda^{(\ast)}(J^P)$ are $\Lambda(sud)$-type ground and excited states with
$J^P$ quantum numbers $J^P=\frac12^{\pm},\frac32^{\pm}$. The calculations are
performed in the framework of a covariant confined quark model previously
developed by us. We find that the values of the helicity amplitudes for the
$\Lambda^\ast(1520,\,\frac32^-)$ and the $\Lambda^\ast(1890,\,\frac32^+)$ are
suppressed compared with those for the ground state $\Lambda(1116,\,\frac12^+)$
and the excited state $\Lambda^\ast(1405,\,\frac12^-)$. This analysis is
important for the identification of the hidden charm pentaquark states
$P_c^+(4380)$ and $P_c^+(4450)$ which were discovered in the decay chain
$\Lambda_b^0~\to~P_c^+(~\to~p~J/\psi)~+~K^- $ because the cascade decay chain
$\Lambda_b~\to~\Lambda^\ast(\frac32^\pm)(~\to~pK^-)~+~J/\psi$ involves the same
final state.
|
[
{
"created": "Sat, 20 May 2017 13:02:57 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jul 2017 08:18:55 GMT",
"version": "v2"
}
] |
2017-07-26
|
[
[
"Gutsche",
"Thomas",
""
],
[
"Ivanov",
"Mikhail A.",
""
],
[
"Körner",
"Jürgen G.",
""
],
[
"Lyubovitskij",
"Valery E.",
""
],
[
"Lyubushkin",
"Vladimir V.",
""
],
[
"Santorelli",
"Pietro",
""
]
] |
We calculate the invariant and helicity amplitudes for the transitions $\Lambda_b~\to~\Lambda^{(\ast)}(J^P)~+~J/\psi$ where the $\Lambda^{(\ast)}(J^P)$ are $\Lambda(sud)$-type ground and excited states with $J^P$ quantum numbers $J^P=\frac12^{\pm},\frac32^{\pm}$. The calculations are performed in the framework of a covariant confined quark model previously developed by us. We find that the values of the helicity amplitudes for the $\Lambda^\ast(1520,\,\frac32^-)$ and the $\Lambda^\ast(1890,\,\frac32^+)$ are suppressed compared with those for the ground state $\Lambda(1116,\,\frac12^+)$ and the excited state $\Lambda^\ast(1405,\,\frac12^-)$. This analysis is important for the identification of the hidden charm pentaquark states $P_c^+(4380)$ and $P_c^+(4450)$ which were discovered in the decay chain $\Lambda_b^0~\to~P_c^+(~\to~p~J/\psi)~+~K^- $ because the cascade decay chain $\Lambda_b~\to~\Lambda^\ast(\frac32^\pm)(~\to~pK^-)~+~J/\psi$ involves the same final state.
|
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.