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hep-ph/0205028
Takashi Inoue
T. Inoue and E. Oset
eta in the nuclear medium within a chiral unitary approach
LaTeX, 13 pages, 9 figures
Nucl.Phys. A710 (2002) 354-370
10.1016/S0375-9474(02)01167-3
null
hep-ph nucl-th
null
The self-energy of an eta meson in the nuclear medium is calculated in a chiral unitary approach. A coupled channel Bethe-Salpeter equation is solved to obtain the effective eta-N interaction in the medium. The base model reproduces well the free space pi-N elastic and inelastic scattering at the eta-N threshold ...
[ { "created": "Thu, 2 May 2002 18:55:07 GMT", "version": "v1" } ]
2016-09-06
[ [ "Inoue", "T.", "" ], [ "Oset", "E.", "" ] ]
The self-energy of an eta meson in the nuclear medium is calculated in a chiral unitary approach. A coupled channel Bethe-Salpeter equation is solved to obtain the effective eta-N interaction in the medium. The base model reproduces well the free space pi-N elastic and inelastic scattering at the eta-N threshold or N^*...
1501.07766
Xiang Liu
Kan Chen, Cheng-Qun Pang, Xiang Liu and Takayuki Matsuki
Light axial vector mesons
18 pages, 11 tables and 25 figures. More discussion added and typos corrected. Accepted by Phys. Rev. D
Phys. Rev. D 91, 074025 (2015)
10.1103/PhysRevD.91.074025
null
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Inspired by the abundant experimental observation of axial-vector states, we study whether the observed axial-vector states can be categorized into the conventional axial-vector meson family. In this paper we carry out an analysis based on the mass spectra and two-body Okubo-Zweig-Iizuka-allowed decays. Besides testi...
[ { "created": "Fri, 30 Jan 2015 13:32:33 GMT", "version": "v1" }, { "created": "Tue, 7 Apr 2015 02:16:42 GMT", "version": "v2" }, { "created": "Sat, 18 Apr 2015 03:18:14 GMT", "version": "v3" } ]
2015-04-23
[ [ "Chen", "Kan", "" ], [ "Pang", "Cheng-Qun", "" ], [ "Liu", "Xiang", "" ], [ "Matsuki", "Takayuki", "" ] ]
Inspired by the abundant experimental observation of axial-vector states, we study whether the observed axial-vector states can be categorized into the conventional axial-vector meson family. In this paper we carry out an analysis based on the mass spectra and two-body Okubo-Zweig-Iizuka-allowed decays. Besides testing...
1111.3027
Ajit Mohan Srivastava
Abhishek Atreya, Anjishnu Sarkar, Ajit M. Srivastava
Spontaneous CP violation in quark scattering from QCD Z(3) interfaces
13 pages, Latex, 7 figures, Two different effective potentials studied with similar temperatures showing consistent results. Final published version
Physical Review D 85, 014009 (2012)
10.1103/PhysRevD.85.014009
null
hep-ph astro-ph.CO nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper, we explore the possibility of spontaneous CP violation in the scattering of quarks and anti-quarks from QCD Z(3) domain walls. The CP violation here arises from the nontrivial profile of the background gauge field $(A_{0})$ between different Z(3) vacua. We calculate the spatial variation of $A_{0}$ acr...
[ { "created": "Sun, 13 Nov 2011 16:09:03 GMT", "version": "v1" }, { "created": "Mon, 30 Jan 2012 17:02:54 GMT", "version": "v2" } ]
2012-01-31
[ [ "Atreya", "Abhishek", "" ], [ "Sarkar", "Anjishnu", "" ], [ "Srivastava", "Ajit M.", "" ] ]
In this paper, we explore the possibility of spontaneous CP violation in the scattering of quarks and anti-quarks from QCD Z(3) domain walls. The CP violation here arises from the nontrivial profile of the background gauge field $(A_{0})$ between different Z(3) vacua. We calculate the spatial variation of $A_{0}$ acros...
1911.03840
Yizhuang Liu
Xiangdong Ji, Yizhuang Liu, and Yu-Sheng Liu
Transverse-Momentum-Dependent Parton Distribution Functions from Large-Momentum Effective Theory
8 pages, 4 figures
null
10.1016/j.physletb.2020.135946
null
hep-ph hep-ex hep-lat nucl-ex nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We show that transverse-momentum-dependent parton distribution functions (TMDPDFs), important non-perturbative quantities for describing the properties of hadrons in high-energy scattering processes such as Drell-Yan and semi-inclusive deep-inelastic scattering with observed small transverse momentum, can be obtained...
[ { "created": "Sun, 10 Nov 2019 03:01:33 GMT", "version": "v1" }, { "created": "Mon, 9 Nov 2020 17:22:31 GMT", "version": "v2" } ]
2020-12-30
[ [ "Ji", "Xiangdong", "" ], [ "Liu", "Yizhuang", "" ], [ "Liu", "Yu-Sheng", "" ] ]
We show that transverse-momentum-dependent parton distribution functions (TMDPDFs), important non-perturbative quantities for describing the properties of hadrons in high-energy scattering processes such as Drell-Yan and semi-inclusive deep-inelastic scattering with observed small transverse momentum, can be obtained f...
1305.1797
Thomas Lang
Thomas Lang, Hendrik van Hees, Jan Steinheimer, Marcus Bleicher
Elliptic flow and nuclear modification factors of D-mesons at FAIR in a Hybrid-Langevin approach
10 pages, 8 figures
null
null
null
hep-ph nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The Compressed Baryonic Matter (CBM) experiment at the Facility for Anti-proton and Ion Research (FAIR) will provide new possibilities for charm-quark ($D$-meson) observables in heavy-ion collisions at low collision energies and high baryon densities. To predict the collective flow and nuclear modification factors of...
[ { "created": "Wed, 8 May 2013 12:46:09 GMT", "version": "v1" } ]
2013-05-09
[ [ "Lang", "Thomas", "" ], [ "van Hees", "Hendrik", "" ], [ "Steinheimer", "Jan", "" ], [ "Bleicher", "Marcus", "" ] ]
The Compressed Baryonic Matter (CBM) experiment at the Facility for Anti-proton and Ion Research (FAIR) will provide new possibilities for charm-quark ($D$-meson) observables in heavy-ion collisions at low collision energies and high baryon densities. To predict the collective flow and nuclear modification factors of c...
hep-ph/0403063
Grzegorz Wilk
M.Biyajima, M.Kaneyama, T.Mizoguchi and G.Wilk
Analyses of k_t distributions at RHIC by means of some selected statistical and stochastic models
Modified version. One new figure, one new table and one reference addeed
Eur.Phys.J. C40 (2005) 243-250
10.1140/epjc/s2005-02140-2
null
hep-ph cond-mat.stat-mech nucl-th
null
The new data on k_t distributions obtained at RHIC are analysed by means of selected models of statistical and stochastic origin in order to estimate their importance in providing new information on hadronization process, in particular on the value of the temperature at freeze-out to hadronic phase.
[ { "created": "Fri, 5 Mar 2004 12:12:23 GMT", "version": "v1" }, { "created": "Thu, 11 Mar 2004 09:34:52 GMT", "version": "v2" }, { "created": "Sat, 15 May 2004 14:20:58 GMT", "version": "v3" }, { "created": "Thu, 16 Dec 2004 11:44:38 GMT", "version": "v4" } ]
2009-11-10
[ [ "Biyajima", "M.", "" ], [ "Kaneyama", "M.", "" ], [ "Mizoguchi", "T.", "" ], [ "Wilk", "G.", "" ] ]
The new data on k_t distributions obtained at RHIC are analysed by means of selected models of statistical and stochastic origin in order to estimate their importance in providing new information on hadronization process, in particular on the value of the temperature at freeze-out to hadronic phase.
2203.10986
Magno Machado
G.S. Ramos, M.V.T. Machado
Investigating the QCD dynamical entropy in high-energy hadronic collisions
08 pages, 4 figures
null
10.1103/PhysRevD.105.094009
null
hep-ph hep-ex hep-th
http://creativecommons.org/licenses/by/4.0/
The dynamical entropy of dense gluonic states in proton-proton collisions at high energies is studied by using phenomenological models for the unintegrated gluon distribution. The corresponding transverse momentum probability distributions are evaluated in terms of rapidity. The dynamical entropy density is obtained ...
[ { "created": "Mon, 21 Mar 2022 13:48:12 GMT", "version": "v1" } ]
2022-05-25
[ [ "Ramos", "G. S.", "" ], [ "Machado", "M. V. T.", "" ] ]
The dynamical entropy of dense gluonic states in proton-proton collisions at high energies is studied by using phenomenological models for the unintegrated gluon distribution. The corresponding transverse momentum probability distributions are evaluated in terms of rapidity. The dynamical entropy density is obtained in...
2305.14273
Hyun Jeong
Hyun Jeong, Kohei Kamada, Alexei A. Starobinsky, Jun'ichi Yokoyama
Reheating process in the $R^2$ inflationary model with the baryogenesis scenario
Presentation expanded, the case of hierarchical Yukawa matrix is considered, and previous conclusions unchanged (29 pages, 12 figures)
null
null
RESCEU-13/23
hep-ph astro-ph.CO
http://creativecommons.org/licenses/by/4.0/
Post-inflationary evolution and (re)heating of the viable inflationary model, the $R^2$ one, is made more realistic by including the leptogenesis scenario into it. For this purpose, right-handed Majorana neutrinos with a large mass are added to the matter sector of the Standard Model to explain the neutrino oscillati...
[ { "created": "Tue, 23 May 2023 17:23:42 GMT", "version": "v1" }, { "created": "Fri, 25 Aug 2023 16:00:32 GMT", "version": "v2" } ]
2023-08-28
[ [ "Jeong", "Hyun", "" ], [ "Kamada", "Kohei", "" ], [ "Starobinsky", "Alexei A.", "" ], [ "Yokoyama", "Jun'ichi", "" ] ]
Post-inflationary evolution and (re)heating of the viable inflationary model, the $R^2$ one, is made more realistic by including the leptogenesis scenario into it. For this purpose, right-handed Majorana neutrinos with a large mass are added to the matter sector of the Standard Model to explain the neutrino oscillation...
0710.2010
Tania Robens
Tania Robens
NLO Event Simulation for Chargino Production at the ILC
4 pages, 6 figures; submitted for the SUSY07 proceedings
null
null
PITHA 07/12, SFB/CPP-07-67
hep-ph
null
We present an extension of the Monte Carlo Event Generator Whizard which includes chargino production at the ILC at NLO. We include photons using both a fixed order and a resummation approach. While the fixed order approach suffers from negative event weights, the resummation method solves this problem and automatica...
[ { "created": "Wed, 10 Oct 2007 13:55:54 GMT", "version": "v1" } ]
2007-10-11
[ [ "Robens", "Tania", "" ] ]
We present an extension of the Monte Carlo Event Generator Whizard which includes chargino production at the ILC at NLO. We include photons using both a fixed order and a resummation approach. While the fixed order approach suffers from negative event weights, the resummation method solves this problem and automaticall...
hep-ph/0001175
S. Y. Choi
S.Y. Choi (KIAS), M. Guchait (DESY), J. Kalinowski (Warsaw U.) and P.M. Zerwas (DESY)
Chargino Pair Production at $e^+e^-$ Colliders with Polarized Beams
19 pages including 4 figures
Phys.Lett. B479 (2000) 235-244
10.1016/S0370-2693(00)00293-8
DESY 99-198, KIAS-P99111, IFT-99/34
hep-ph
null
The chargino $\tilde{\chi}^\pm_{1,2}$ system can be reconstructed completely in $e^+e^-$ collisions. By measuring the total cross sections and the asymmetries with polarized beams in $e^+e^-\to\tilde{\chi}_i^+ \tilde{\chi}_j^- [i,j=1,2]$, the chargino masses and the gaugino-higgsino mixing angles of these states can ...
[ { "created": "Tue, 18 Jan 2000 08:16:57 GMT", "version": "v1" } ]
2009-10-31
[ [ "Choi", "S. Y.", "", "KIAS" ], [ "Guchait", "M.", "", "DESY" ], [ "Kalinowski", "J.", "", "Warsaw U." ], [ "Zerwas", "P. M.", "", "DESY" ] ]
The chargino $\tilde{\chi}^\pm_{1,2}$ system can be reconstructed completely in $e^+e^-$ collisions. By measuring the total cross sections and the asymmetries with polarized beams in $e^+e^-\to\tilde{\chi}_i^+ \tilde{\chi}_j^- [i,j=1,2]$, the chargino masses and the gaugino-higgsino mixing angles of these states can be...
2309.15922
Shuang-Yong Zhou
Qing Chen, Ken Mimasu, Tong Arthur Wu, Guo-Dong Zhang, Shuang-Yong Zhou
Capping the positivity cone: dimension-8 Higgs operators in the SMEFT
32 pages + appendices, 9 figures; to appear in JHEP
null
null
null
hep-ph hep-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
SMEFT Wilson coefficients are subject to various positivity bounds in order to be consistent with the fundamental principles of S-matrix. Previous bounds on dimension-8 SMEFT operators have been obtained using the positivity part of UV partial wave unitarity and form a (projective) convex cone. We derive a set of lin...
[ { "created": "Wed, 27 Sep 2023 18:01:01 GMT", "version": "v1" }, { "created": "Sat, 9 Mar 2024 07:01:49 GMT", "version": "v2" } ]
2024-03-12
[ [ "Chen", "Qing", "" ], [ "Mimasu", "Ken", "" ], [ "Wu", "Tong Arthur", "" ], [ "Zhang", "Guo-Dong", "" ], [ "Zhou", "Shuang-Yong", "" ] ]
SMEFT Wilson coefficients are subject to various positivity bounds in order to be consistent with the fundamental principles of S-matrix. Previous bounds on dimension-8 SMEFT operators have been obtained using the positivity part of UV partial wave unitarity and form a (projective) convex cone. We derive a set of linea...
2108.07740
Shu-Yi Wei
Kai-bao Chen, Zuo-tang Liang, Yu-kun Song, Shu-yi Wei
Longitudinal and transverse polarizations of $\Lambda$ hyperon in unpolarized SIDIS and $e^+e^-$ annihilation
13 pages, 7 figures; to be published on PRD
null
10.1103/PhysRevD.105.034027
null
hep-ph hep-ex nucl-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We make a systematic study of $\Lambda$ hyperon polarizations in unpolarized lepton induced semi-inclusive reactions such as $e^-N\to e^-\Lambda X$ and $e^+e^-\to\Lambda h X$. We present the general form of cross sections in terms of structure functions obtained from a general kinematic analysis. This already shows t...
[ { "created": "Tue, 17 Aug 2021 16:21:42 GMT", "version": "v1" }, { "created": "Tue, 31 Aug 2021 10:24:36 GMT", "version": "v2" }, { "created": "Sat, 19 Feb 2022 07:20:52 GMT", "version": "v3" } ]
2022-03-14
[ [ "Chen", "Kai-bao", "" ], [ "Liang", "Zuo-tang", "" ], [ "Song", "Yu-kun", "" ], [ "Wei", "Shu-yi", "" ] ]
We make a systematic study of $\Lambda$ hyperon polarizations in unpolarized lepton induced semi-inclusive reactions such as $e^-N\to e^-\Lambda X$ and $e^+e^-\to\Lambda h X$. We present the general form of cross sections in terms of structure functions obtained from a general kinematic analysis. This already shows tha...
hep-ph/9507444
Chris Traxler
Christoph T. Traxler and Markus H. Thoma
Photon Emission from a Parton Gas at Chemical Non-Equilibrium
17 pages, uuencoded Postscript file, figures included
Phys.Rev.C53:1348-1352,1996
10.1103/PhysRevC.53.1348
UGI-95-06
hep-ph nucl-th
null
We compute the hard photon production rate of a chemically non-equilibrated quark-gluon plasma. We assume that the plasma is already thermally equilibrated, i.~e. describable by a temperature, but with a phase-space distribution that deviates from the Fermi/Bose distribution by a time dependent factor (fugacity). The...
[ { "created": "Fri, 28 Jul 1995 12:11:50 GMT", "version": "v1" } ]
2008-11-26
[ [ "Traxler", "Christoph T.", "" ], [ "Thoma", "Markus H.", "" ] ]
We compute the hard photon production rate of a chemically non-equilibrated quark-gluon plasma. We assume that the plasma is already thermally equilibrated, i.~e. describable by a temperature, but with a phase-space distribution that deviates from the Fermi/Bose distribution by a time dependent factor (fugacity). The p...
hep-ph/0406237
Tetsuo Nishikawa
Tetsuo Nishikawa
Flavour-singlet g_A and the QCD sum rule incorporating instanton effects
15 pages, 2 figures
Phys.Lett. B597 (2004) 173-181
10.1016/j.physletb.2004.07.003
KEK-TH-967
hep-ph
null
We derive a QCD sum rule for the flavour-singlet axial coupling constant $g_A^{(0)}$ from a two point correlation function of flavour-singlet axial vector currents in a one-nucleon state. In evaluating the correlation function by an operator product expansion we take into account the terms up to dimension 6. This cor...
[ { "created": "Tue, 22 Jun 2004 04:42:15 GMT", "version": "v1" } ]
2009-11-10
[ [ "Nishikawa", "Tetsuo", "" ] ]
We derive a QCD sum rule for the flavour-singlet axial coupling constant $g_A^{(0)}$ from a two point correlation function of flavour-singlet axial vector currents in a one-nucleon state. In evaluating the correlation function by an operator product expansion we take into account the terms up to dimension 6. This corre...
1102.0188
Maxim Chernodub
M. N. Chernodub and A. S. Nedelin
Phase diagram of chirally imbalanced QCD matter
6 pages, 4 figures, RevTeX 4.1
Phys.Rev.D83:105008,2011
10.1103/PhysRevD.83.105008
UUITP-01/11
hep-ph hep-lat hep-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We compute the QCD phase diagram in the plane of the chiral chemical potential and temperature using the linear sigma model coupled to quarks and to the Polyakov loop. The chiral chemical potential accounts for effects of imbalanced chirality due to QCD sphaleron transitions which may emerge in heavy-ion collisions. ...
[ { "created": "Tue, 1 Feb 2011 15:44:13 GMT", "version": "v1" } ]
2015-03-18
[ [ "Chernodub", "M. N.", "" ], [ "Nedelin", "A. S.", "" ] ]
We compute the QCD phase diagram in the plane of the chiral chemical potential and temperature using the linear sigma model coupled to quarks and to the Polyakov loop. The chiral chemical potential accounts for effects of imbalanced chirality due to QCD sphaleron transitions which may emerge in heavy-ion collisions. We...
0901.1553
Hanqing Zheng
Ou Zhang, C. Meng, H. Q. Zheng
Ambiversion of X(3872)
Slightly revised version accepted for publication in Physics Letter B
Phys.Lett.B680:453-458,2009
10.1016/j.physletb.2009.09.033
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
An analysis including most recent Belle data on X(3872) is performed, using coupled channel Flatt\'e formula. A third sheet pole close to but \textit{below} $D^0D^{*0}$ threshold is found, besides the bound state/virtual state pole discussed in previous literature. The co-existence of two poles near the $D^0D^{*0}$ t...
[ { "created": "Mon, 12 Jan 2009 11:15:35 GMT", "version": "v1" }, { "created": "Sun, 6 Sep 2009 12:24:21 GMT", "version": "v2" } ]
2009-10-06
[ [ "Zhang", "Ou", "" ], [ "Meng", "C.", "" ], [ "Zheng", "H. Q.", "" ] ]
An analysis including most recent Belle data on X(3872) is performed, using coupled channel Flatt\'e formula. A third sheet pole close to but \textit{below} $D^0D^{*0}$ threshold is found, besides the bound state/virtual state pole discussed in previous literature. The co-existence of two poles near the $D^0D^{*0}$ thr...
1802.01769
Zhong-Jun Yang
Zhong-Jun Yang, Shu-Min Zhao, Xing-Xing Dong, Xi-Jie Zhan, Hai-Bin Zhang, Tai-Fu Feng
Corrections to $R_{D}$ and $R_{D^{*}}$ in the BLMSSM
null
Chin.Phys.C42(2018)no.11,113105
10.1088/1674-1137/42/11/113104
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The deviation of the measurement of $R_{D}$ ($R_{D^{*}}$) from the Standard Model (SM) expectation is $2.3\sigma$ ($3.1\sigma$). $R_{D}$ ($R_{D^{*}}$) is the ratio of the branching fraction of $\overline{B} \rightarrow D\tau\overline{\nu}_{\tau}$ ($\overline{B} \rightarrow D^{*}\tau\overline{\nu}_{\tau}$) to that of ...
[ { "created": "Tue, 6 Feb 2018 02:56:55 GMT", "version": "v1" }, { "created": "Tue, 19 Jun 2018 05:03:45 GMT", "version": "v2" }, { "created": "Fri, 24 Aug 2018 02:01:31 GMT", "version": "v3" }, { "created": "Thu, 18 Oct 2018 14:08:47 GMT", "version": "v4" } ]
2018-10-30
[ [ "Yang", "Zhong-Jun", "" ], [ "Zhao", "Shu-Min", "" ], [ "Dong", "Xing-Xing", "" ], [ "Zhan", "Xi-Jie", "" ], [ "Zhang", "Hai-Bin", "" ], [ "Feng", "Tai-Fu", "" ] ]
The deviation of the measurement of $R_{D}$ ($R_{D^{*}}$) from the Standard Model (SM) expectation is $2.3\sigma$ ($3.1\sigma$). $R_{D}$ ($R_{D^{*}}$) is the ratio of the branching fraction of $\overline{B} \rightarrow D\tau\overline{\nu}_{\tau}$ ($\overline{B} \rightarrow D^{*}\tau\overline{\nu}_{\tau}$) to that of $\...
0808.3909
C. A. Dominguez
C.A. Dominguez, N.F. Nasrallah, R. R\"ontsch K. Schilcher
Light quark masses from QCD sum rules with minimal hadronic bias
In Memoriam: Giuseppe (Beppe) Nardulli, Jan Stern, and Francisco (Paco) Yndurain. Invited talk given by C.A. Dominguez at QCD-08, 14th International QCD Conference, Montpellier, France, July 2008
Nucl.Phys.Proc.Suppl.186:133-136,2009
10.1016/j.nuclphysbps.2008.12.031
UCT-TP-275/08
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The light quark masses are determined using a new QCD Finite Energy Sum Rule (FESR) in the pseudoscalar channel. This FESR involves an integration kernel designed to reduce considerably the contribution of the (unmeasured) hadronic resonance spectral functions. The QCD sector of the FESR includes perturbative QCD (PQ...
[ { "created": "Thu, 28 Aug 2008 13:50:08 GMT", "version": "v1" } ]
2009-05-12
[ [ "Dominguez", "C. A.", "" ], [ "Nasrallah", "N. F.", "" ], [ "Schilcher", "R. Röntsch K.", "" ] ]
The light quark masses are determined using a new QCD Finite Energy Sum Rule (FESR) in the pseudoscalar channel. This FESR involves an integration kernel designed to reduce considerably the contribution of the (unmeasured) hadronic resonance spectral functions. The QCD sector of the FESR includes perturbative QCD (PQCD...
1011.6507
Lars T. Kyllingstad
Rashid Khan and Lars T. Kyllingstad
The chiral phase transition and the role of vacuum fluctuations
Talk given at the IX International Conference on Quark Confinement and the Hadron Spectrum (QCHS9), Madrid, 2010. 3 pages, 4 figures
AIP Conf.Proc.1343:504-506,2011
10.1063/1.3575076
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We investigate the chiral phase transition in the quark-meson effective model using optimised perturbation theory to one loop. Certain terms in the free energy are frequently omitted in calculations, on the assumption that their contribution is negligible. We show that this is not necessarily the case, and that the o...
[ { "created": "Tue, 30 Nov 2010 09:59:58 GMT", "version": "v1" } ]
2011-07-13
[ [ "Khan", "Rashid", "" ], [ "Kyllingstad", "Lars T.", "" ] ]
We investigate the chiral phase transition in the quark-meson effective model using optimised perturbation theory to one loop. Certain terms in the free energy are frequently omitted in calculations, on the assumption that their contribution is negligible. We show that this is not necessarily the case, and that the ord...
1403.1128
Sreemoyee Sarkar
Sreemoyee Sarkar
Modification of heavy quark energy loss due to shear flow in hot QCD plasma
arXiv admin note: text overlap with arXiv:1205.4895
null
null
null
hep-ph nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present the derivation of heavy quark energy loss in a viscous QCD plasma using kinetic theory. Shear flow changes both boson and fermion distribution functions which eventually modify heavy quark energy loss. Due to presence of non-zero flow gradient in the medium all the bath particles here are out of equilibriu...
[ { "created": "Wed, 5 Mar 2014 13:47:10 GMT", "version": "v1" } ]
2014-03-06
[ [ "Sarkar", "Sreemoyee", "" ] ]
We present the derivation of heavy quark energy loss in a viscous QCD plasma using kinetic theory. Shear flow changes both boson and fermion distribution functions which eventually modify heavy quark energy loss. Due to presence of non-zero flow gradient in the medium all the bath particles here are out of equilibrium....
2307.10361
Thomas Steingasser
Thomas Steingasser, David I. Kaiser
Higgs Criticality beyond the Standard Model
17 pages, 7 figures. Minor revisions and references added to match the published version in Physical Review D
null
null
MIT-CTP/5581
hep-ph hep-th
http://creativecommons.org/licenses/by/4.0/
Both parameters in the Higgs field's potential, its mass and quartic coupling, appear fine-tuned to near-critical values, which gives rise to the hierarchy problem and the metastability of the electroweak vacuum. Whereas such behavior appears puzzling in the context of particle physics, it is a common feature of dyna...
[ { "created": "Wed, 19 Jul 2023 18:00:01 GMT", "version": "v1" }, { "created": "Mon, 6 Nov 2023 00:08:13 GMT", "version": "v2" } ]
2023-11-07
[ [ "Steingasser", "Thomas", "" ], [ "Kaiser", "David I.", "" ] ]
Both parameters in the Higgs field's potential, its mass and quartic coupling, appear fine-tuned to near-critical values, which gives rise to the hierarchy problem and the metastability of the electroweak vacuum. Whereas such behavior appears puzzling in the context of particle physics, it is a common feature of dynami...
1911.10886
Victor Goncalves
V. P. Goncalves, M. M. Jaime
Photoproduction of pentaquarks states at the LHC
6 pages, 4 figures. Improved version published in Physics Letters B
null
10.1016/j.physletb.2020.135447
null
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper we investigate the production of pentaquark states in the photon -- proton interactions present in hadronic collisions at the RHIC and LHC. We consider two phenomenological models for the $J/\Psi$ photoproduction that consider the presence of the $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$ resonances in th...
[ { "created": "Mon, 25 Nov 2019 13:06:36 GMT", "version": "v1" }, { "created": "Wed, 13 May 2020 15:13:01 GMT", "version": "v2" } ]
2020-05-20
[ [ "Goncalves", "V. P.", "" ], [ "Jaime", "M. M.", "" ] ]
In this paper we investigate the production of pentaquark states in the photon -- proton interactions present in hadronic collisions at the RHIC and LHC. We consider two phenomenological models for the $J/\Psi$ photoproduction that consider the presence of the $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$ resonances in the ...
0707.0946
Carlos Merino
C. Merino, C. Pajares, and Yu. M. Shabelski
Open Charm Production in pp and Heavy Ion Collisions in QCD
Talk given at the Ninth Workshop on Non-Perturbative Quantum Chromodynamics, Paris (France), June 4th-8th, 2007 (8 pages and 3 figures)
ECONFC0706044:20,2007
null
null
hep-ph
null
The RHIC data on charm production are compared with the kT-factorization approach predictions, both standard NLO QCD and FONLL. The calculated results underestimate the STAR Collaboration data. The role of possible nuclear effects is discussed.
[ { "created": "Fri, 6 Jul 2007 11:02:40 GMT", "version": "v1" } ]
2008-11-26
[ [ "Merino", "C.", "" ], [ "Pajares", "C.", "" ], [ "Shabelski", "Yu. M.", "" ] ]
The RHIC data on charm production are compared with the kT-factorization approach predictions, both standard NLO QCD and FONLL. The calculated results underestimate the STAR Collaboration data. The role of possible nuclear effects is discussed.
2301.09267
June-Young Kim
Ki-Hoon Hong, June-Young Kim, Hyun-Chul Kim
Two-dimensional charge distributions of the $\Delta$ baryon: Interpolation between the nonrelativistic and ultrarelativistic limit
22 pages, 12 figures
null
10.1103/PhysRevD.107.074004
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We investigate how the charge distributions of both the unpolarized and transversely polarized $\Delta$ baryon change as the longitudinal momentum~($P_{z}$) of the $\Delta$ baryon increases from $P_{z}=0$ to $P_{z}=\infty$ in a Wigner phase-space perspective. When the $\Delta$ baryon is longitudinally polarized, its ...
[ { "created": "Mon, 23 Jan 2023 04:33:31 GMT", "version": "v1" } ]
2023-04-19
[ [ "Hong", "Ki-Hoon", "" ], [ "Kim", "June-Young", "" ], [ "Kim", "Hyun-Chul", "" ] ]
We investigate how the charge distributions of both the unpolarized and transversely polarized $\Delta$ baryon change as the longitudinal momentum~($P_{z}$) of the $\Delta$ baryon increases from $P_{z}=0$ to $P_{z}=\infty$ in a Wigner phase-space perspective. When the $\Delta$ baryon is longitudinally polarized, its tw...
1706.06047
Konrad Tywoniuk
Yacine Mehtar-Tani and Konrad Tywoniuk
Radiative energy loss of neighboring subjets
34 pages, 15 figures
null
10.1016/j.nuclphysa.2018.09.041
INT-PUB-17-022, CERN-TH-2017-134
hep-ph nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We compute the in-medium energy loss probability distribution of two neighboring subjets at leading order, in the large-$N_c$ approximation. Our result exhibits a gradual onset of color decoherence of the system and accounts for two expected limiting cases. When the angular separation is smaller than the characterist...
[ { "created": "Mon, 19 Jun 2017 16:37:10 GMT", "version": "v1" }, { "created": "Fri, 10 Aug 2018 15:35:37 GMT", "version": "v2" } ]
2018-10-17
[ [ "Mehtar-Tani", "Yacine", "" ], [ "Tywoniuk", "Konrad", "" ] ]
We compute the in-medium energy loss probability distribution of two neighboring subjets at leading order, in the large-$N_c$ approximation. Our result exhibits a gradual onset of color decoherence of the system and accounts for two expected limiting cases. When the angular separation is smaller than the characteristic...
hep-ph/0001257
Dmitri Kazakov
D.I. Kazakov (BLTP, JINR, Dubna and ITEP, Moscow)
Supersymmetry in Particle Physics: The Renormalization Group Viewpoint
45 pages, LaTeX, 11 .eps figures, review talk given at the Conference ``Renormalization Group at the Turn of the Millennium'', Taxco, Mexico, January 1999
Phys.Rept.344:309-353,2001
10.1016/S0370-1573(00)00129-0
null
hep-ph
null
An attempt is made to present modern hopes to find manifestation of supersymmetry, a new symmetry that relates bosons and fermions, in particle physics from the point of view of renormalization group flow. The Standard Model of particle interactions is briefly reviewed, the main notions of supersymmetry are introduce...
[ { "created": "Tue, 25 Jan 2000 12:48:17 GMT", "version": "v1" } ]
2009-09-25
[ [ "Kazakov", "D. I.", "", "BLTP, JINR, Dubna and ITEP, Moscow" ] ]
An attempt is made to present modern hopes to find manifestation of supersymmetry, a new symmetry that relates bosons and fermions, in particle physics from the point of view of renormalization group flow. The Standard Model of particle interactions is briefly reviewed, the main notions of supersymmetry are introduced....
hep-ph/9405304
Martin Beneke
M.Beneke, V.M.Braun and V.I.Zakharov
Bloch-Nordsieck cancellations beyond logarithms in heavy particle decays
LATEX, 7 pages, one figure appended as uu-encoded ps-file, MPI-PhT/94-18
Phys.Rev.Lett. 73 (1994) 3058-3061
10.1103/PhysRevLett.73.3058
null
hep-ph
null
We investigate the one-loop radiative corrections to the semileptonic decay of a charged particle at finite gauge boson mass. Extending the Bloch-Nordsieck cancellation of infrared logarithms, the subsequent non-analytic terms are also found to vanish after eliminating the pole mass in favor of a mass defined at shor...
[ { "created": "Mon, 16 May 1994 15:04:17 GMT", "version": "v1" } ]
2009-10-28
[ [ "Beneke", "M.", "" ], [ "Braun", "V. M.", "" ], [ "Zakharov", "V. I.", "" ] ]
We investigate the one-loop radiative corrections to the semileptonic decay of a charged particle at finite gauge boson mass. Extending the Bloch-Nordsieck cancellation of infrared logarithms, the subsequent non-analytic terms are also found to vanish after eliminating the pole mass in favor of a mass defined at short ...
2404.03666
Dhananjay Saikumar Mr
Dhananjay Saikumar
Exploring the Frontiers: Challenges and Theories Beyond the Standard Model
null
null
null
null
hep-ph
http://creativecommons.org/licenses/by/4.0/
Quantum Field Theory (QFT) forms the bedrock of the Standard Model (SM) of particle physics, a powerful framework that delineates the fundamental constituents and interactions of the universe. However, the SM's narrative is incomplete, as it conspicuously fails to account for several empirical phenomena that challeng...
[ { "created": "Fri, 16 Feb 2024 17:17:57 GMT", "version": "v1" } ]
2024-04-08
[ [ "Saikumar", "Dhananjay", "" ] ]
Quantum Field Theory (QFT) forms the bedrock of the Standard Model (SM) of particle physics, a powerful framework that delineates the fundamental constituents and interactions of the universe. However, the SM's narrative is incomplete, as it conspicuously fails to account for several empirical phenomena that challenge ...
hep-ph/0602063
Kirill Tuchin
Dmitri Kharzeev, Eugene Levin, Kirill Tuchin
Multi-particle Production and Thermalization in High-Energy QCD
25 pages, 4 figures; typos fixed; discussions expanded; we added a new section IV in which we argue that at high energies the production mechanism discussed in the paper is parametrically enhanced by ln(1/x) with respect to the quasi-classical result
Phys.Rev.C75:044903,2007
10.1103/PhysRevC.75.044903
BNL-NT-06/8, TAUP 2821/06
hep-ph
null
We argue that multi-particle production in high energy hadron and nuclear collisions can be considered as proceeding through the production of gluons in the background classical field. In this approach we derive the gluon spectrum immediately after the collision and find that at high energies it is parametrically enh...
[ { "created": "Tue, 7 Feb 2006 15:36:51 GMT", "version": "v1" }, { "created": "Wed, 22 Feb 2006 20:49:57 GMT", "version": "v2" }, { "created": "Wed, 28 Feb 2007 20:13:32 GMT", "version": "v3" } ]
2008-11-26
[ [ "Kharzeev", "Dmitri", "" ], [ "Levin", "Eugene", "" ], [ "Tuchin", "Kirill", "" ] ]
We argue that multi-particle production in high energy hadron and nuclear collisions can be considered as proceeding through the production of gluons in the background classical field. In this approach we derive the gluon spectrum immediately after the collision and find that at high energies it is parametrically enhan...
hep-ph/0506281
Ivan Vitev
Ivan Vitev
Large angle hadron correlations from medium-induced gluon radiation
To appear in the proceedings of the MIT workshop "Correlations and Fluctuations 2005". 10 pages, 5 eps figures
J.Phys.Conf.Ser. 27 (2005) 11-21
10.1088/1742-6596/27/1/002
LA-UR-05-0621
hep-ph
null
Final state medium-induced gluon radiation in ultradense nuclear matter is shown to favor large angle emission when compared to vacuum bremsstrahlung due to the suppression of collinear gluons. In a simple model of momentum transfers from the medium to the jet+gluon system the phase space distribution of non-Abelian ...
[ { "created": "Mon, 27 Jun 2005 22:10:18 GMT", "version": "v1" } ]
2009-11-11
[ [ "Vitev", "Ivan", "" ] ]
Final state medium-induced gluon radiation in ultradense nuclear matter is shown to favor large angle emission when compared to vacuum bremsstrahlung due to the suppression of collinear gluons. In a simple model of momentum transfers from the medium to the jet+gluon system the phase space distribution of non-Abelian br...
1902.08766
Cheng-Jun Xia
Cheng-Jun Xia and Toshiki Maruyama and Nobutoshi Yasutake and Toshitaka Tatsumi
Constraining quark-hadron interface tension in the multi-messenger era
null
Phys. Rev. D 99, 103017 (2019)
10.1103/PhysRevD.99.103017
null
hep-ph astro-ph.HE
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study the interface effects of quark-hadron mixed phase in compact stars. The properties of nuclear matter are obtained based on the relativistic-mean-field model. For the quark phase, we adopt perturbation model with running quark masses and coupling constant. At certain choices of parameter sets, it is found tha...
[ { "created": "Sat, 23 Feb 2019 09:40:18 GMT", "version": "v1" }, { "created": "Sat, 1 Jun 2019 08:50:20 GMT", "version": "v2" } ]
2019-06-05
[ [ "Xia", "Cheng-Jun", "" ], [ "Maruyama", "Toshiki", "" ], [ "Yasutake", "Nobutoshi", "" ], [ "Tatsumi", "Toshitaka", "" ] ]
We study the interface effects of quark-hadron mixed phase in compact stars. The properties of nuclear matter are obtained based on the relativistic-mean-field model. For the quark phase, we adopt perturbation model with running quark masses and coupling constant. At certain choices of parameter sets, it is found that ...
1112.1340
Claudia Hagedorn
Reinier de Adelhart Toorop, Ferruccio Feruglio, Claudia Hagedorn
Finite Modular Groups and Lepton Mixing
27 pages + 8 pages of appendices, 1 figure
null
10.1016/j.nuclphysb.2012.01.017
DFPD-11/TH/18
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study lepton mixing patterns which are derived from finite modular groups Gamma_N, requiring subgroups G_nu and G_e to be preserved in the neutrino and charged lepton sectors, respectively. We show that only six groups Gamma_N with N=3,4,5,7,8,16 are relevant. A comprehensive analysis is presented for G_e arbitrar...
[ { "created": "Tue, 6 Dec 2011 16:37:40 GMT", "version": "v1" } ]
2015-06-03
[ [ "Toorop", "Reinier de Adelhart", "" ], [ "Feruglio", "Ferruccio", "" ], [ "Hagedorn", "Claudia", "" ] ]
We study lepton mixing patterns which are derived from finite modular groups Gamma_N, requiring subgroups G_nu and G_e to be preserved in the neutrino and charged lepton sectors, respectively. We show that only six groups Gamma_N with N=3,4,5,7,8,16 are relevant. A comprehensive analysis is presented for G_e arbitrary ...
0901.3528
Dennis D. Dietrich
Dennis D. Dietrich and Matti Jarvinen
Pion masses in quasiconformal gauge field theories
4 pages, 1 figure
Phys.Rev.D79:057903,2009
10.1103/PhysRevD.79.057903
CP3-Origins: 2009-4
hep-ph hep-th nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study modifications to Weinberg-like sum rules in quasiconformal gauge field theories. Beyond the two Weinberg sum rules and the oblique S parameter we study the pion mass and the X parameter. Especially, we evaluate the pion mass for walking technicolour theories, in particular also minimal walking technicolour, ...
[ { "created": "Thu, 22 Jan 2009 18:27:36 GMT", "version": "v1" } ]
2009-07-30
[ [ "Dietrich", "Dennis D.", "" ], [ "Jarvinen", "Matti", "" ] ]
We study modifications to Weinberg-like sum rules in quasiconformal gauge field theories. Beyond the two Weinberg sum rules and the oblique S parameter we study the pion mass and the X parameter. Especially, we evaluate the pion mass for walking technicolour theories, in particular also minimal walking technicolour, an...
hep-ph/9907272
Otto Kong
Ashok Das and Otto C. W. Kong (Rochester U.)
On Neutrino Masses and Mixings from Extra Dimensions
16 pages latex, no figure; small modifications in discussions; version to appear in Phys.Lett. B
Phys.Lett. B470 (1999) 149-156
10.1016/S0370-2693(99)01340-4
UR-1576
hep-ph
null
In the framework of a Kaluza-Klein type theory with the Standard Model fields localized on a 4-dimensional section while gravity propagates in a full $4+\delta$-dimensional space-time, we examine a mechanism of naturally small neutrino mass generation through couplings of Standard Model singlet fermion(s) living also...
[ { "created": "Wed, 7 Jul 1999 20:30:25 GMT", "version": "v1" }, { "created": "Fri, 12 Nov 1999 16:46:19 GMT", "version": "v2" } ]
2009-10-31
[ [ "Das", "Ashok", "", "Rochester U." ], [ "Kong", "Otto C. W.", "", "Rochester U." ] ]
In the framework of a Kaluza-Klein type theory with the Standard Model fields localized on a 4-dimensional section while gravity propagates in a full $4+\delta$-dimensional space-time, we examine a mechanism of naturally small neutrino mass generation through couplings of Standard Model singlet fermion(s) living also i...
hep-ph/9612441
Ming Lu
C. Glenn Boyd, Ming Lu, Martin J. Savage
Heavy Baryon Mixing in Chiral Perturbation Theory
10 pages, LaTex, uses revtex, two eps figures
Phys.Rev.D55:5474-5478,1997
10.1103/PhysRevD.55.5474
CMU-HEP96-15, DOE/ER/41014-06-N97
hep-ph
null
We discuss the SU(3) and heavy quark spin-symmetry breaking mixing between the Xi_c and Xi'_c charmed baryons. Chromomagnetic hyperfine interactions are the leading source of spin-symmetry breaking and together with the SU(3) breaking mass differences between the lightest pseudo-Goldstone bosons gives the leading con...
[ { "created": "Fri, 20 Dec 1996 22:42:54 GMT", "version": "v1" } ]
2014-11-17
[ [ "Boyd", "C. Glenn", "" ], [ "Lu", "Ming", "" ], [ "Savage", "Martin J.", "" ] ]
We discuss the SU(3) and heavy quark spin-symmetry breaking mixing between the Xi_c and Xi'_c charmed baryons. Chromomagnetic hyperfine interactions are the leading source of spin-symmetry breaking and together with the SU(3) breaking mass differences between the lightest pseudo-Goldstone bosons gives the leading contr...
0706.2694
Robert Foot
R. Foot
Mirror dark matter
about 7 pages
Int.J.Mod.Phys.A22:4951-4957,2007
10.1142/S0217751X0703830X
null
hep-ph astro-ph
null
A mirror sector of particles and forces provides a simple explanation of the inferred dark matter of the Universe. The status of this theory is reviewed - with emphasis on how the theory explains the impressive DAMA/NaI annual modulation signal, whilst also being consistent with the null results of the other direct d...
[ { "created": "Tue, 19 Jun 2007 00:35:29 GMT", "version": "v1" } ]
2008-11-26
[ [ "Foot", "R.", "" ] ]
A mirror sector of particles and forces provides a simple explanation of the inferred dark matter of the Universe. The status of this theory is reviewed - with emphasis on how the theory explains the impressive DAMA/NaI annual modulation signal, whilst also being consistent with the null results of the other direct det...
1212.4383
Javier Vijande Asenjo
J. Vijande, A. Valcarce, T.F. Caram\'es, H. Garcilazo
Heavy hadron spectroscopy: a quark model perspective
Invited talk at the 11th International Conference on Hypernuclear and Strange Particle Physics, Barcelona (Spain)
Int. J. Mod. Phys. E Vol. 22 (2013) 1330011
10.1142/S0218301313300117
null
hep-ph nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present recent results of hadron spectroscopy and hadron-hadron interaction from the perspective of constituent quark models. We pay special attention to the role played by higher order Fock space components in the hadron spectra and the connection of this extension with the hadron-hadron interaction. The main goa...
[ { "created": "Tue, 18 Dec 2012 15:32:11 GMT", "version": "v1" } ]
2015-06-12
[ [ "Vijande", "J.", "" ], [ "Valcarce", "A.", "" ], [ "Caramés", "T. F.", "" ], [ "Garcilazo", "H.", "" ] ]
We present recent results of hadron spectroscopy and hadron-hadron interaction from the perspective of constituent quark models. We pay special attention to the role played by higher order Fock space components in the hadron spectra and the connection of this extension with the hadron-hadron interaction. The main goal ...
hep-ph/0509064
Tomohiro Matsuda
Tomohiro Matsuda
Dark matter production from cosmic necklaces
27 pages, 5 figures, added many comments and 3 figures, accepted for publication in JCAP
JCAP 0604 (2006) 005
10.1088/1475-7516/2006/04/005
null
hep-ph astro-ph hep-th
null
Cosmic strings have gained a great interest, since they are formed in a large class of brane inflationary models. The most interesting story is that cosmic strings in brane models are distinguished in future cosmological observations. If the strings in brane models are branes or superstrings that can move along compa...
[ { "created": "Wed, 7 Sep 2005 11:21:25 GMT", "version": "v1" }, { "created": "Mon, 28 Nov 2005 10:36:55 GMT", "version": "v2" }, { "created": "Thu, 29 Dec 2005 03:42:52 GMT", "version": "v3" }, { "created": "Sun, 2 Apr 2006 05:28:12 GMT", "version": "v4" } ]
2009-11-11
[ [ "Matsuda", "Tomohiro", "" ] ]
Cosmic strings have gained a great interest, since they are formed in a large class of brane inflationary models. The most interesting story is that cosmic strings in brane models are distinguished in future cosmological observations. If the strings in brane models are branes or superstrings that can move along compact...
1312.2212
Vsevolod Orlovsky
M.A. Andreichikov, B.O. Kerbikov, V.D. Orlovsky, Yu.A. Simonov
Neutron in Strong Magnetic Fields
29 pages, 4 figures
Phys. Rev. D 89, 074033 (2014)
10.1103/PhysRevD.89.074033
null
hep-ph nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Relativistic world-line Hamiltonian for strongly interacting 3q systems in magnetic field is derived from the path integral for the corresponding Green's function. The neutral baryon Hamiltonian in magnetic field obeys the pseudomomentum conservation and allows a factorization of the c.m. and internal motion. The res...
[ { "created": "Sun, 8 Dec 2013 13:43:01 GMT", "version": "v1" } ]
2014-04-23
[ [ "Andreichikov", "M. A.", "" ], [ "Kerbikov", "B. O.", "" ], [ "Orlovsky", "V. D.", "" ], [ "Simonov", "Yu. A.", "" ] ]
Relativistic world-line Hamiltonian for strongly interacting 3q systems in magnetic field is derived from the path integral for the corresponding Green's function. The neutral baryon Hamiltonian in magnetic field obeys the pseudomomentum conservation and allows a factorization of the c.m. and internal motion. The resul...
1809.01140
Patrick Komiske
Patrick T. Komiske, Eric M. Metodiev, Jesse Thaler
An operational definition of quark and gluon jets
38 pages, 10 figures, 1 table; v2: updated to match JHEP version
JHEP 11 (2018) 059
10.1007/JHEP11(2018)059
MIT-CTP 5042
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
While "quark" and "gluon" jets are often treated as separate, well-defined objects in both theoretical and experimental contexts, no precise, practical, and hadron-level definition of jet flavor presently exists. To remedy this issue, we develop and advocate for a data-driven, operational definition of quark and gluo...
[ { "created": "Tue, 4 Sep 2018 18:00:00 GMT", "version": "v1" }, { "created": "Fri, 9 Nov 2018 23:14:37 GMT", "version": "v2" } ]
2018-11-13
[ [ "Komiske", "Patrick T.", "" ], [ "Metodiev", "Eric M.", "" ], [ "Thaler", "Jesse", "" ] ]
While "quark" and "gluon" jets are often treated as separate, well-defined objects in both theoretical and experimental contexts, no precise, practical, and hadron-level definition of jet flavor presently exists. To remedy this issue, we develop and advocate for a data-driven, operational definition of quark and gluon ...
1102.2896
James Unwin
James Unwin
Vacuum stability and the Cholesky decomposition
7 pages
Eur.Phys.J.C71:1663,2011
10.1140/epjc/s10052-011-1663-9
null
hep-ph hep-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We discuss how the Cholesky decomposition may be used to ascertain whether a critical point of the field theory scalar potential provides a stable vacuum configuration. We then use this method to derive the stability conditions in a specific example.
[ { "created": "Mon, 14 Feb 2011 21:01:03 GMT", "version": "v1" } ]
2011-06-13
[ [ "Unwin", "James", "" ] ]
We discuss how the Cholesky decomposition may be used to ascertain whether a critical point of the field theory scalar potential provides a stable vacuum configuration. We then use this method to derive the stability conditions in a specific example.
hep-ph/0110272
Anjan Joshipura
Srubabati Goswami and Anjan S. Joshipura
Neutrino Anomalies and Quasi-Dirac neutrinos
15 pages, LATEX, minor corrections; addition of few references
Phys.Rev. D65 (2002) 073025
10.1103/PhysRevD.65.073025
null
hep-ph
null
We discuss possibility of describing solar, atmospheric and LSND results with four neutrinos forming two quasi-degenerate pairs. The simplest versions of this 2+2 scheme with either $\nu_e$ or $\nu_\mu$ mixing exclusively with sterile neutrino is disfavored by the SNO and atmospheric neutrino results respectively. A ...
[ { "created": "Sat, 20 Oct 2001 08:12:40 GMT", "version": "v1" }, { "created": "Tue, 6 Nov 2001 08:39:08 GMT", "version": "v2" } ]
2009-11-07
[ [ "Goswami", "Srubabati", "" ], [ "Joshipura", "Anjan S.", "" ] ]
We discuss possibility of describing solar, atmospheric and LSND results with four neutrinos forming two quasi-degenerate pairs. The simplest versions of this 2+2 scheme with either $\nu_e$ or $\nu_\mu$ mixing exclusively with sterile neutrino is disfavored by the SNO and atmospheric neutrino results respectively. A ge...
2205.13889
Maciej Rybczynski
Maciej Rybczy\'nski and Zbigniew W{\l}odarczyk
Non-exponential decay in classical stochastic processes with memory
null
Acta Phys. Pol. B 54, 2-A2 (2023)
10.5506/APhysPolB.54.2-A2
null
hep-ph math.PR
http://creativecommons.org/licenses/by/4.0/
The initial time-dependence of a state in circumstances where it makes transitions to, or decay to, a second state has been investigated. In classical stochastic processes, the observed time dependence of transition or decay proportional to $t^2$ is attributed to the noise with memory. In contrast to quantum mechanic...
[ { "created": "Fri, 27 May 2022 10:41:26 GMT", "version": "v1" }, { "created": "Mon, 12 Sep 2022 14:56:05 GMT", "version": "v2" }, { "created": "Tue, 7 Mar 2023 14:43:16 GMT", "version": "v3" } ]
2023-03-15
[ [ "Rybczyński", "Maciej", "" ], [ "Włodarczyk", "Zbigniew", "" ] ]
The initial time-dependence of a state in circumstances where it makes transitions to, or decay to, a second state has been investigated. In classical stochastic processes, the observed time dependence of transition or decay proportional to $t^2$ is attributed to the noise with memory. In contrast to quantum mechanics,...
1010.0272
Matti Jarvinen
Matti Jarvinen
Electroweak phase transition in technicolor
6 pages, 4 figures. Talk at PASCOS 2010 conference, Valencia, 19-23 July 2010
null
10.1088/1742-6596/259/1/012053
CP3-Origins-2010-42, CCTP-2010-14
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Several phenomenologically viable walking technicolor models have been proposed recently. I demonstrate that these models can have first order electroweak phase transitions, which are sufficiently strong for electroweak baryogenesis. Strong dynamics can also lead to several separate transitions at the electroweak sca...
[ { "created": "Fri, 1 Oct 2010 22:25:14 GMT", "version": "v1" } ]
2015-05-20
[ [ "Jarvinen", "Matti", "" ] ]
Several phenomenologically viable walking technicolor models have been proposed recently. I demonstrate that these models can have first order electroweak phase transitions, which are sufficiently strong for electroweak baryogenesis. Strong dynamics can also lead to several separate transitions at the electroweak scale...
2011.12123
Nils Hermansson-Truedsson
Johan Bijnens, Nils Hermansson-Truedsson, Laetitia Laub, Antonio Rodriguez-Sanchez
Short-distance HLbL contributions to the muon g-2
Proceedings for talk given at 23rd International Conference in Quantum Chromodynamics (QCD 20), 27 October - 30 October 2020, Montpellier - FR
null
null
null
hep-ph
http://creativecommons.org/licenses/by/4.0/
The current $3.7\sigma$ discrepancy between the Standard Model prediction and the experimental value of the muon anomalous magnetic moment could be a hint for the existence of new physics. The hadronic light-by-light contribution is one of the pieces requiring improved precision on the theory side, and an important s...
[ { "created": "Tue, 24 Nov 2020 14:30:45 GMT", "version": "v1" } ]
2020-11-25
[ [ "Bijnens", "Johan", "" ], [ "Hermansson-Truedsson", "Nils", "" ], [ "Laub", "Laetitia", "" ], [ "Rodriguez-Sanchez", "Antonio", "" ] ]
The current $3.7\sigma$ discrepancy between the Standard Model prediction and the experimental value of the muon anomalous magnetic moment could be a hint for the existence of new physics. The hadronic light-by-light contribution is one of the pieces requiring improved precision on the theory side, and an important ste...
hep-ph/0304286
Yasuhiro Okada
Yasuhiro Okada (KEK)
Theoretical introduction to linear collider phyiscs
18 pages, 12 figures, talk given at International Workshop on Linear Colliders, August 26 - 30, 2002, Jeju Island, Korea
null
null
KEK-TH-884
hep-ph
null
Physics at an e^+e^- linear collider is described as a theoretical introduction to Linear Collider Workshop 2002.
[ { "created": "Wed, 30 Apr 2003 11:31:33 GMT", "version": "v1" } ]
2007-05-23
[ [ "Okada", "Yasuhiro", "", "KEK" ] ]
Physics at an e^+e^- linear collider is described as a theoretical introduction to Linear Collider Workshop 2002.
hep-ph/0312008
Hitoshi Murayama
Hitoshi Murayama
Impact of Neutrino Oscillation Measurements on Theory
8 pages, uses aipproc, 6 figures. Plenary talk presented at Nufact 03, 5th International Workshop on Neutrino Factories & Superbeams, Columbia University, New York, 5-11 June 2003
AIP Conf.Proc.721:122-129,2004
10.1063/1.1818385
null
hep-ph
null
Neutrino oscillation data had been a big surprise to theorists, and indeed they have ongoing impact on theory. I review what the impact has been, and what measurements will have critical impact on theory in the future.
[ { "created": "Sun, 30 Nov 2003 04:29:00 GMT", "version": "v1" } ]
2009-09-29
[ [ "Murayama", "Hitoshi", "" ] ]
Neutrino oscillation data had been a big surprise to theorists, and indeed they have ongoing impact on theory. I review what the impact has been, and what measurements will have critical impact on theory in the future.
2003.08200
Piotr Lebiedowicz
Piotr Lebiedowicz, Rafa{\l} Maciu{\l}a, Antoni Szczurek
Production of $f_{0}(980)$ meson at the LHC: Color evaporation versus color-singlet gluon-gluon fusion
20 pages, 12 figures
Physics Letters B 806 (2020) 135475
10.1016/j.physletb.2020.135475
null
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The production of the $f_{0}(980)$ meson at high energies is not well understood. We investigate two different potential mechanisms for inclusive scalar meson production in the $k_t$-factorization approach: color-singlet gluon-gluon fusion and color evaporation model. The $\gamma^* \gamma^* \to f_0(980)$ form factor(...
[ { "created": "Wed, 18 Mar 2020 13:12:01 GMT", "version": "v1" }, { "created": "Sun, 17 May 2020 17:13:58 GMT", "version": "v2" } ]
2020-05-19
[ [ "Lebiedowicz", "Piotr", "" ], [ "Maciuła", "Rafał", "" ], [ "Szczurek", "Antoni", "" ] ]
The production of the $f_{0}(980)$ meson at high energies is not well understood. We investigate two different potential mechanisms for inclusive scalar meson production in the $k_t$-factorization approach: color-singlet gluon-gluon fusion and color evaporation model. The $\gamma^* \gamma^* \to f_0(980)$ form factor(s)...
1809.05526
Yair Mulian
Edmond Iancu, Yair Mulian
Forward trijet production in proton-nucleus collisions
63 pages, 31 figures
null
10.1016/j.nuclphysa.2019.02.003
null
hep-ph nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Using the formalism of the light-cone wave function in perturbative QCD together with the hybrid factorization, we compute the cross-section for three particle production at forward rapidities in proton-nucleus collisions. We focus on the quark channel, in which the three produced partons -- a quark accompanied by a ...
[ { "created": "Fri, 14 Sep 2018 17:57:21 GMT", "version": "v1" } ]
2019-03-27
[ [ "Iancu", "Edmond", "" ], [ "Mulian", "Yair", "" ] ]
Using the formalism of the light-cone wave function in perturbative QCD together with the hybrid factorization, we compute the cross-section for three particle production at forward rapidities in proton-nucleus collisions. We focus on the quark channel, in which the three produced partons -- a quark accompanied by a gl...
hep-ph/9209264
null
S. Y. Choi and H. S. Song
Exclusive heavy meson pair production by $\gamma\gamma$ collision in heavy quark effective theory
10pages (LaTex) (two figures, available on request), SNUTP 92-57
Phys.Lett. B296 (1992) 420-424
10.1016/0370-2693(92)91342-7
null
hep-ph
null
The spin and flavor symmetries of the heavy quark effective theory are employed to discuss the exclusive cross sections for pair production of heavy mesons in photon-photon collision. The ratios of the exclusive cross sections for heavy mesons are obtained explicitly and the validity of results is discussed.
[ { "created": "Tue, 22 Sep 1992 19:17:12 GMT", "version": "v1" } ]
2009-10-22
[ [ "Choi", "S. Y.", "" ], [ "Song", "H. S.", "" ] ]
The spin and flavor symmetries of the heavy quark effective theory are employed to discuss the exclusive cross sections for pair production of heavy mesons in photon-photon collision. The ratios of the exclusive cross sections for heavy mesons are obtained explicitly and the validity of results is discussed.
2205.07912
Rahool Kumar Barman
Rahool Kumar Barman and Ahmed Ismail
Constraining the top electroweak sector of the SMEFT through $Z$ associated top pair and single top production at the HL-LHC
19 pages, 9 figures, 8 tables
null
null
null
hep-ph
http://creativecommons.org/licenses/by/4.0/
We study the processes $pp \to t\bar{t}Z$ and $pp \to tZj$ in the framework of Standard Model Effective Field Theory (SMEFT), employing conventional cut-and-count as well as machine learning techniques to take advantage of kinematic information in complex final states involving multiple leptons and $b$ jets. We explo...
[ { "created": "Mon, 16 May 2022 18:01:06 GMT", "version": "v1" } ]
2022-05-18
[ [ "Barman", "Rahool Kumar", "" ], [ "Ismail", "Ahmed", "" ] ]
We study the processes $pp \to t\bar{t}Z$ and $pp \to tZj$ in the framework of Standard Model Effective Field Theory (SMEFT), employing conventional cut-and-count as well as machine learning techniques to take advantage of kinematic information in complex final states involving multiple leptons and $b$ jets. We explore...
1808.07470
Fredrick Olness
Bo-Ting Wang, T. J. Hobbs, Sean Doyle, Jun Gao, Tie-Jiun Hou, Pavel M. Nadolsky, Fredrick I. Olness
PDFSense: Mapping the sensitivity of hadronic experiments to nucleon structure
6 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:1803.02777
null
null
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Recent high precision experimental data from a variety of hadronic processes opens new opportunities for determination of the collinear parton distribution functions (PDFs) of the proton. In fact, the wealth of information from experiments such as the Large Hadron Collider (LHC) and others, makes it difficult to quic...
[ { "created": "Tue, 21 Aug 2018 20:12:42 GMT", "version": "v1" } ]
2018-08-24
[ [ "Wang", "Bo-Ting", "" ], [ "Hobbs", "T. J.", "" ], [ "Doyle", "Sean", "" ], [ "Gao", "Jun", "" ], [ "Hou", "Tie-Jiun", "" ], [ "Nadolsky", "Pavel M.", "" ], [ "Olness", "Fredrick I.", "" ] ]
Recent high precision experimental data from a variety of hadronic processes opens new opportunities for determination of the collinear parton distribution functions (PDFs) of the proton. In fact, the wealth of information from experiments such as the Large Hadron Collider (LHC) and others, makes it difficult to quickl...
hep-ph/9807332
Michael Melles
Michael Melles, W. James Stirling
All-Orders Resummation of Leading Logarithmic Contributions to Heavy Quark Production in Polarized \gamma \gamma Collisions
30 pages, Latex2e with eps-figure format, submitted to Phys. Rev. D
Phys.Rev.D59:094009,1999
10.1103/PhysRevD.59.094009
DTP/98/42
hep-ph
null
The measurements of the $\gamma\gamma$ and $b \bar b$ partial decay widths of an intermediate-mass Standard Model Higgs boson are among the most important goals of a future photon linear collider. While in an initially polarized $J_z=0$ state the background process $\gamma\gamma \to b \bar b$ is suppressed by $\frac{...
[ { "created": "Fri, 10 Jul 1998 16:06:55 GMT", "version": "v1" } ]
2011-01-25
[ [ "Melles", "Michael", "" ], [ "Stirling", "W. James", "" ] ]
The measurements of the $\gamma\gamma$ and $b \bar b$ partial decay widths of an intermediate-mass Standard Model Higgs boson are among the most important goals of a future photon linear collider. While in an initially polarized $J_z=0$ state the background process $\gamma\gamma \to b \bar b$ is suppressed by $\frac{m^...
1407.6703
A. H. Rezaeian
N\'estor Armesto, Amir H. Rezaeian
Diffractive photoproduction of vector mesons at the LHC
7 pages, 9 figures, to appear in proceedings of DIS 2014, XXII. International Workshop on Deep-Inelastic Scattering and Related Subjects, 28 April - 2 May 2014, Warsaw, Poland
null
null
null
hep-ph nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We confront saturation-based results for diffractive $\psi(2s)$ and $\rho$ production at HERA and $J/\psi$ photoproduction with all available data including recent ones from HERA, ALICE and LHCb, finding a good agreement. We show that the $t$-distribution of differential cross-section of photoproduction of vector mes...
[ { "created": "Thu, 24 Jul 2014 19:51:54 GMT", "version": "v1" } ]
2014-07-25
[ [ "Armesto", "Néstor", "" ], [ "Rezaeian", "Amir H.", "" ] ]
We confront saturation-based results for diffractive $\psi(2s)$ and $\rho$ production at HERA and $J/\psi$ photoproduction with all available data including recent ones from HERA, ALICE and LHCb, finding a good agreement. We show that the $t$-distribution of differential cross-section of photoproduction of vector meson...
hep-ph/9403308
Choong Sun Kim
C.S. Kim, Daesung Hwang, Pyungwon Ko and Wuk Namgung
Measuring $|V_{ub}|$ at future B-Factories
9 pages (1 fugure not included)
Nucl.Phys.Proc.Suppl.37A:69-74,1994
10.1016/0920-5632(94)90736-6
MAD/PH/817, YUMS 94-03, SNUTP 94-11
hep-ph
null
We calculate the so--called Fermi motion parameter $p_{_F}$ of ACCMM model using the variational method in a potential model approach. We also propose hadronic invariant mass distribution as an alternative experimental observable to measure $V_{ub}$ at future asymmetric $B$ factories.
[ { "created": "Fri, 18 Mar 1994 06:09:46 GMT", "version": "v1" } ]
2015-06-25
[ [ "Kim", "C. S.", "" ], [ "Hwang", "Daesung", "" ], [ "Ko", "Pyungwon", "" ], [ "Namgung", "Wuk", "" ] ]
We calculate the so--called Fermi motion parameter $p_{_F}$ of ACCMM model using the variational method in a potential model approach. We also propose hadronic invariant mass distribution as an alternative experimental observable to measure $V_{ub}$ at future asymmetric $B$ factories.
1403.6897
Oleksandr Gituliar
Oleksandr Gituliar
Higher-Order Corrections in QCD Evolution Equations and Tools for Their Calculation
PhD thesis
null
null
IFJPAN-IV-2014-4
hep-ph
http://creativecommons.org/licenses/by-nc-sa/3.0/
In this thesis we calculate the NLO one-loop virtual contributions to the QCD DGLAP splitting functions in a form suitable for Monte Carlo simulations. We use the standard technique based on the factorization properties of mass singularities in the light-cone axial gauge \cite{EGMPR79,CFP80} but we propose a modifica...
[ { "created": "Thu, 27 Mar 2014 00:57:17 GMT", "version": "v1" }, { "created": "Tue, 29 Apr 2014 13:21:59 GMT", "version": "v2" } ]
2014-04-30
[ [ "Gituliar", "Oleksandr", "" ] ]
In this thesis we calculate the NLO one-loop virtual contributions to the QCD DGLAP splitting functions in a form suitable for Monte Carlo simulations. We use the standard technique based on the factorization properties of mass singularities in the light-cone axial gauge \cite{EGMPR79,CFP80} but we propose a modificati...
2012.01537
Gretel Quintero Angulo Dr.
G. Quintero Angulo, L. C. Su\'arez Gonz\'alez, A. P\'erez Mart\'inez and H. P\'erez Rojas
Magnetized vector boson gas at any temperature
26 pages, 7 figures
Phys. Rev. C 104, 035803 (2021)
10.1103/PhysRevC.104.035803
null
hep-ph astro-ph.HE cond-mat.quant-gas
http://creativecommons.org/licenses/by/4.0/
We study the thermodynamic properties of a relativistic magnetized neutral vector boson gas at any temperature. By comparing the results with the low temperature and the non relativistic descriptions of this gas, we found that the fully relativistic case can be separated in two regimes according to temperature. For l...
[ { "created": "Wed, 2 Dec 2020 21:22:29 GMT", "version": "v1" }, { "created": "Tue, 19 Jan 2021 21:57:14 GMT", "version": "v2" }, { "created": "Fri, 3 Sep 2021 21:12:29 GMT", "version": "v3" } ]
2021-09-22
[ [ "Angulo", "G. Quintero", "" ], [ "González", "L. C. Suárez", "" ], [ "Martínez", "A. Pérez", "" ], [ "Rojas", "H. Pérez", "" ] ]
We study the thermodynamic properties of a relativistic magnetized neutral vector boson gas at any temperature. By comparing the results with the low temperature and the non relativistic descriptions of this gas, we found that the fully relativistic case can be separated in two regimes according to temperature. For low...
hep-ph/9610236
prof. Shmuel Nussinov
Shmuel Nussinov
Comments on glueballinos (R0 particles) and R0 searches
LaTeX, 28 pages
Phys.Rev. D57 (1998) 7006-7018
10.1103/PhysRevD.57.7006
TPI-MINN-96/18-T
hep-ph
null
We propose a search strategy for the light R0 (glueballino) particle suggested by G.Farrar in connection with the light gluino scenario. The basic idea is to moderate and stop the R0 particles and then observe their decay to almost monochromatic pions - at an appropriate time delay relative to a primary collision eve...
[ { "created": "Thu, 3 Oct 1996 19:11:52 GMT", "version": "v1" }, { "created": "Tue, 8 Oct 1996 23:23:37 GMT", "version": "v2" } ]
2009-10-28
[ [ "Nussinov", "Shmuel", "" ] ]
We propose a search strategy for the light R0 (glueballino) particle suggested by G.Farrar in connection with the light gluino scenario. The basic idea is to moderate and stop the R0 particles and then observe their decay to almost monochromatic pions - at an appropriate time delay relative to a primary collision event...
hep-ph/0204354
Abdelhak Djouadi
Aseshkrishna Datta, Abdelhak Djouadi and Margarete Muhlleitner (LPMT Montpellier)
Associated production of sfermions and gauginos at high-energy e+e- colliders: the case of selectrons and electronic sneutrinos
24 pages, latex, axodraw.sty, 6 figures
Eur.Phys.J.C25:539-551,2002
10.1007/s10052-002-1027-6
PM/02-09
hep-ph
null
We analyze the associated production at future high--energy $e^+e^-$ colliders, of first generation sleptons with neutralinos and charginos in the modes $e^+ e^-$ and $e \gamma$, in the framework of the Minimal Supersymmetric extension of the Standard Model. We show that the production rates, in particular for associ...
[ { "created": "Tue, 30 Apr 2002 13:57:24 GMT", "version": "v1" } ]
2009-01-07
[ [ "Datta", "Aseshkrishna", "", "LPMT\n Montpellier" ], [ "Djouadi", "Abdelhak", "", "LPMT\n Montpellier" ], [ "Muhlleitner", "Margarete", "", "LPMT\n Montpellier" ] ]
We analyze the associated production at future high--energy $e^+e^-$ colliders, of first generation sleptons with neutralinos and charginos in the modes $e^+ e^-$ and $e \gamma$, in the framework of the Minimal Supersymmetric extension of the Standard Model. We show that the production rates, in particular for associat...
1509.00146
Yuki Kamiya
Yuki Kamiya, Tetsuo Hyodo
Structure of near-threshold quasi-bound states
5 pages, no figure, v3: published version
Phys. Rev. C 93, 035203 (2016)
10.1103/PhysRevC.93.035203
null
hep-ph hep-ex nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study the compositeness of near-threshold quasi-bound states in the framework of effective field theory. From the viewpoint of the low-energy universality, we revisit the model-independent relations between the structure of the bound state and the observables in the weak binding limit. The effective field theory i...
[ { "created": "Tue, 1 Sep 2015 05:28:03 GMT", "version": "v1" }, { "created": "Sun, 6 Sep 2015 07:49:50 GMT", "version": "v2" }, { "created": "Sun, 22 May 2016 07:02:09 GMT", "version": "v3" } ]
2016-05-24
[ [ "Kamiya", "Yuki", "" ], [ "Hyodo", "Tetsuo", "" ] ]
We study the compositeness of near-threshold quasi-bound states in the framework of effective field theory. From the viewpoint of the low-energy universality, we revisit the model-independent relations between the structure of the bound state and the observables in the weak binding limit. The effective field theory is ...
1805.01295
A. A. Natale
D. A. Fagundes, E. G. S. Luna, A. A. Natale and M. Pelaez
Exclusive production of pions and the pion distribution amplitude
9 pages, 5 figures, extended discussion, new references, version to appear in J. Phys. G
null
null
null
hep-ph hep-ex nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Considering, as a limit case, an approximately flat pion distribution amplitude, which is determined from the hardest, in momentum space, solution of the Bethe-Salpeter equation for the pion wave function, we compute the pion transition form factor $F_{\pi\gamma\gamma^{*}}(Q^{2})$ and the pion form factor $F_{\pi}(Q^...
[ { "created": "Wed, 2 May 2018 13:51:26 GMT", "version": "v1" }, { "created": "Tue, 8 Oct 2019 15:39:33 GMT", "version": "v2" }, { "created": "Mon, 20 Jan 2020 12:58:23 GMT", "version": "v3" } ]
2020-01-22
[ [ "Fagundes", "D. A.", "" ], [ "Luna", "E. G. S.", "" ], [ "Natale", "A. A.", "" ], [ "Pelaez", "M.", "" ] ]
Considering, as a limit case, an approximately flat pion distribution amplitude, which is determined from the hardest, in momentum space, solution of the Bethe-Salpeter equation for the pion wave function, we compute the pion transition form factor $F_{\pi\gamma\gamma^{*}}(Q^{2})$ and the pion form factor $F_{\pi}(Q^2)...
1805.07101
Takaaki Nomura
Tatsuo Kobayashi, Takaaki Nomura, Hiroshi Okada
Predictive neutrino mass textures with origin of flavor symmetries
23 pages, 3 figures, version accepted for publication in physical review D
Phys. Rev. D 98, 055025 (2018)
10.1103/PhysRevD.98.055025
EPHOU-18-004, KIAS-P18042, APCTP Pre2018 - 011
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We investigate origins of predictive one-zero neutrino mass textures in a systematic way. Here we search Abelian continuous(discrete) global symmetries, and non-Abelian discrete symmetries, and show how to realize these neutrino masses. Then we propose a concrete model involving a dark matter candidate and an extra g...
[ { "created": "Fri, 18 May 2018 08:54:35 GMT", "version": "v1" }, { "created": "Wed, 5 Sep 2018 12:54:26 GMT", "version": "v2" } ]
2018-09-26
[ [ "Kobayashi", "Tatsuo", "" ], [ "Nomura", "Takaaki", "" ], [ "Okada", "Hiroshi", "" ] ]
We investigate origins of predictive one-zero neutrino mass textures in a systematic way. Here we search Abelian continuous(discrete) global symmetries, and non-Abelian discrete symmetries, and show how to realize these neutrino masses. Then we propose a concrete model involving a dark matter candidate and an extra gau...
hep-ph/9902389
Mauro Moretti
C. Broggini, I. Masina, M. Moretti
The relevance of the vertex bremsstrahlung photon detection in the electron-neutrino (antineutrino) electron scattering experiments at low energy
Plain Latex plus six postscript figures not included in the text
Phys.Lett. B452 (1999) 137-142
10.1016/S0370-2693(99)00250-6
null
hep-ph
null
We discuss the size of the electron-antineutrino electron into electron-antineutrino electron cross section reduction due to the rejection of the events with a vertex bremsstrahlung photon above a certain energy in the final state. In particular we analyze the effect in experiments designed to detect the low energy e...
[ { "created": "Thu, 18 Feb 1999 14:19:18 GMT", "version": "v1" } ]
2009-10-31
[ [ "Broggini", "C.", "" ], [ "Masina", "I.", "" ], [ "Moretti", "M.", "" ] ]
We discuss the size of the electron-antineutrino electron into electron-antineutrino electron cross section reduction due to the rejection of the events with a vertex bremsstrahlung photon above a certain energy in the final state. In particular we analyze the effect in experiments designed to detect the low energy ele...
1604.05328
Bakul Agarwal `
Bakul Agarwal, Joshua Isaacson and Kirtimaan A. Mohan
Minimal Dilaton Model and the Diphoton Excess
27 pages, 14 figures
Phys. Rev. D 94, 035027 (2016)
10.1103/PhysRevD.94.035027
null
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In light of the recent 750 GeV diphoton excesses reported by the ATLAS and CMS collaborations, we investigate the possibility of explaining this excess using the Minimal Dilaton Model. We find that this model is able to explain the observed excess with the presence of additional top partner(s), with same charge as th...
[ { "created": "Mon, 18 Apr 2016 20:00:27 GMT", "version": "v1" } ]
2016-09-07
[ [ "Agarwal", "Bakul", "" ], [ "Isaacson", "Joshua", "" ], [ "Mohan", "Kirtimaan A.", "" ] ]
In light of the recent 750 GeV diphoton excesses reported by the ATLAS and CMS collaborations, we investigate the possibility of explaining this excess using the Minimal Dilaton Model. We find that this model is able to explain the observed excess with the presence of additional top partner(s), with same charge as the ...
hep-ph/0204280
Helmut Eberl
H. Eberl, W. Majerotto, and V. C. Spanos
Radiative corrections to single Higgs boson production in $e^+ e^-$ annihilation
Version to appear in Phys. Lett. B
Phys.Lett. B538 (2002) 353-358
10.1016/S0370-2693(02)02031-2
HEPHY-PUB 754/02
hep-ph
null
For energies relevant to future linear colliders, $\sqrt{s} \gsim 500$ GeV, the WW fusion channel dominates the Higgs boson production cross section $e^+ e^- \to \bar{\nu} \nu h^0$. We have calculated the one-loop corrections to this process due to fermion and sfermion loops in the context of the MSSM. As a special c...
[ { "created": "Wed, 24 Apr 2002 12:45:49 GMT", "version": "v1" }, { "created": "Tue, 30 Apr 2002 15:52:53 GMT", "version": "v2" }, { "created": "Wed, 29 May 2002 15:32:32 GMT", "version": "v3" } ]
2015-06-25
[ [ "Eberl", "H.", "" ], [ "Majerotto", "W.", "" ], [ "Spanos", "V. C.", "" ] ]
For energies relevant to future linear colliders, $\sqrt{s} \gsim 500$ GeV, the WW fusion channel dominates the Higgs boson production cross section $e^+ e^- \to \bar{\nu} \nu h^0$. We have calculated the one-loop corrections to this process due to fermion and sfermion loops in the context of the MSSM. As a special cas...
1412.8333
Debasish Borah
Rupam Kalita, Debasish Borah and Mrinal Kumar Das
Corrections to Scaling Neutrino Mixing: Non-zero $\theta_{13}, \delta_{CP}$ and Baryon Asymmetry
30 pages, 7 figures, to appear in Nucl. Phys. B
null
10.1016/j.nuclphysb.2015.03.007
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study a very specific type of neutrino mass and mixing structure based on the idea of Strong Scaling Ansatz (SSA) where the ratios of neutrino mass matrix elements belonging to two different columns are equal. There are three such possibilities, all of which are disfavored by the latest neutrino oscillation data. ...
[ { "created": "Mon, 29 Dec 2014 13:28:05 GMT", "version": "v1" }, { "created": "Wed, 11 Mar 2015 17:58:15 GMT", "version": "v2" } ]
2015-06-23
[ [ "Kalita", "Rupam", "" ], [ "Borah", "Debasish", "" ], [ "Das", "Mrinal Kumar", "" ] ]
We study a very specific type of neutrino mass and mixing structure based on the idea of Strong Scaling Ansatz (SSA) where the ratios of neutrino mass matrix elements belonging to two different columns are equal. There are three such possibilities, all of which are disfavored by the latest neutrino oscillation data. We...
1506.06386
Jonathan Rosner
Marek Karliner and Jonathan L. Rosner
New Exotic Meson and Baryon Resonances from Doubly-Heavy Hadronic Molecules
8 pages, no figures, additional text and references, to be published in Phys. Rev. Letters
Phys. Rev. Lett. 115, 122001 (2015)
10.1103/PhysRevLett.115.122001
EFI 15-20, TAUP 2997/15
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We predict several new exotic doubly-heavy hadronic resonances, inferring from the observed exotic bottomonium-like and charmonium-like narrow states $X(3872)$, $Z_b(10610)$, $Z_b(10650)$, $Z_c(3900)$, and $Z_c(4020/4025)$. We interpret the binding mechanism as mostly molecular-like isospin-exchange attraction betwee...
[ { "created": "Sun, 21 Jun 2015 16:32:53 GMT", "version": "v1" }, { "created": "Fri, 26 Jun 2015 16:17:03 GMT", "version": "v2" }, { "created": "Mon, 13 Jul 2015 18:55:56 GMT", "version": "v3" }, { "created": "Mon, 24 Aug 2015 16:46:18 GMT", "version": "v4" } ]
2015-09-23
[ [ "Karliner", "Marek", "" ], [ "Rosner", "Jonathan L.", "" ] ]
We predict several new exotic doubly-heavy hadronic resonances, inferring from the observed exotic bottomonium-like and charmonium-like narrow states $X(3872)$, $Z_b(10610)$, $Z_b(10650)$, $Z_c(3900)$, and $Z_c(4020/4025)$. We interpret the binding mechanism as mostly molecular-like isospin-exchange attraction between ...
2011.10959
Zhi-Gang Wang
Zhi-Gang Wang
Analysis of the $Z_{cs}(3985)$ as the axialvector tetraquark state
13 pages, 4 figures
Chin. Phys. C45 (2021) 073107
10.1088/1674-1137/abfa83
null
hep-ph
http://creativecommons.org/licenses/by/4.0/
In this paper, we choose the scalar and axialvector diquark operators in the color antitriplet as the fundamental building blocks to construct the four-quark currents and investigate the diquark-antidiquark type axialvector tetraquark states $c\bar{c}u\bar{s}$ in the framework of the QCD sum rules. The predicted tetr...
[ { "created": "Sun, 22 Nov 2020 07:12:01 GMT", "version": "v1" }, { "created": "Mon, 29 Mar 2021 13:48:02 GMT", "version": "v2" } ]
2021-05-27
[ [ "Wang", "Zhi-Gang", "" ] ]
In this paper, we choose the scalar and axialvector diquark operators in the color antitriplet as the fundamental building blocks to construct the four-quark currents and investigate the diquark-antidiquark type axialvector tetraquark states $c\bar{c}u\bar{s}$ in the framework of the QCD sum rules. The predicted tetraq...
2008.12838
Eric S. Swanson
T.J. Burns and E.S. Swanson
Kinematical Cusp and Resonance Interpretations of the $X(2900)$
10 pages, 3 figures. Version to appear in Physics Letters B
null
10.1016/j.physletb.2020.136057
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We examine whether the LHCb vector $ud\bar{c}\bar{s}$ state $X(2900)$ can be interpreted as a kinematical cusp effect arising from $\bar D^*K^*$ and $\bar D_1 K^*$ interactions. The production amplitude is modelled as a triangle diagram with hadronic final state interactions. A satisfactory fit to the Dalitz plot pro...
[ { "created": "Fri, 28 Aug 2020 20:37:06 GMT", "version": "v1" }, { "created": "Fri, 1 Jan 2021 23:14:54 GMT", "version": "v2" } ]
2021-01-06
[ [ "Burns", "T. J.", "" ], [ "Swanson", "E. S.", "" ] ]
We examine whether the LHCb vector $ud\bar{c}\bar{s}$ state $X(2900)$ can be interpreted as a kinematical cusp effect arising from $\bar D^*K^*$ and $\bar D_1 K^*$ interactions. The production amplitude is modelled as a triangle diagram with hadronic final state interactions. A satisfactory fit to the Dalitz plot proje...
2404.07842
Filip Rescic
J. M. Carmona, J. L. Cort\'es, F. Rescic, M. A. Reyes, T. Terzi\'c, F. I. Vrban
Approaches to photon absorption in a Lorentz invariance violation scenario
11 pages, 10 figures
null
null
null
hep-ph astro-ph.HE gr-qc
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We examine the Universe's transparency to gamma rays within a Lorentz Invariance Violation (LIV) framework, focusing on photon subluminal quadratic corrections driven by a high-energy scale. Based on an explicit calculation, we provide a new expression for the cross section that overcomes the limitations of previous ...
[ { "created": "Thu, 11 Apr 2024 15:30:57 GMT", "version": "v1" } ]
2024-04-12
[ [ "Carmona", "J. M.", "" ], [ "Cortés", "J. L.", "" ], [ "Rescic", "F.", "" ], [ "Reyes", "M. A.", "" ], [ "Terzić", "T.", "" ], [ "Vrban", "F. I.", "" ] ]
We examine the Universe's transparency to gamma rays within a Lorentz Invariance Violation (LIV) framework, focusing on photon subluminal quadratic corrections driven by a high-energy scale. Based on an explicit calculation, we provide a new expression for the cross section that overcomes the limitations of previous ap...
0809.2788
Joao Silva
P. M. Ferreira and Joao P. Silva
Discrete and continuous symmetries in multi-Higgs-doublet models
13 pages, RevTex, references added
Phys.Rev.D78:116007,2008
10.1103/PhysRevD.78.116007
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We consider the Higgs sector of multi-Higgs-doublet models in the presence of simple symmetries relating the various fields. We construct basis invariant observables which may in principle be used to detect these symmetries for any number of doublets. A categorization of the symmetries into classes is required, which...
[ { "created": "Tue, 16 Sep 2008 20:01:36 GMT", "version": "v1" }, { "created": "Mon, 29 Sep 2008 18:26:19 GMT", "version": "v2" } ]
2010-04-15
[ [ "Ferreira", "P. M.", "" ], [ "Silva", "Joao P.", "" ] ]
We consider the Higgs sector of multi-Higgs-doublet models in the presence of simple symmetries relating the various fields. We construct basis invariant observables which may in principle be used to detect these symmetries for any number of doublets. A categorization of the symmetries into classes is required, which w...
hep-ph/0411207
Tomoi Koide
T. Koide
Phenomenological approach to the critical dynamics of the QCD phase transition revisited
13 pages, the Curie principle is discussed in S.2, to appear in J.Phys.G
J.Phys. G31 (2005) 1055-1066
10.1088/0954-3899/31/9/008
null
hep-ph cond-mat.stat-mech nucl-th
null
The phenomenological dynamics of the QCD critical phenomena is revisited. Recently, Son and Stephanov claimed that the dynamical universality class of the QCD phase transition belongs to model H. In their discussion, they employed a time-dependent Ginzburg-Landau equation for the net baryon number density, which is a...
[ { "created": "Tue, 16 Nov 2004 11:35:59 GMT", "version": "v1" }, { "created": "Tue, 12 Jul 2005 15:32:50 GMT", "version": "v2" } ]
2009-11-10
[ [ "Koide", "T.", "" ] ]
The phenomenological dynamics of the QCD critical phenomena is revisited. Recently, Son and Stephanov claimed that the dynamical universality class of the QCD phase transition belongs to model H. In their discussion, they employed a time-dependent Ginzburg-Landau equation for the net baryon number density, which is a c...
hep-ph/0504244
Christian Fischer
Christian S. Fischer and Daniel Zwanziger
Infrared Behaviour and Running Couplings in Interpolating Gauges in QCD
8 pages, 2 figures; v2: minor changes, version published in PRD
Phys.Rev. D72 (2005) 054005
10.1103/PhysRevD.72.054005
IPPP/05/05 DCPT/05/10
hep-ph hep-lat hep-th
null
We consider the class of gauges that interpolates between Landau- and Coulomb-gauge QCD, and show the non-renormalisation of the two independent ghost-gluon vertices. This implies the existence of two RG-invariant running couplings, one of which is interpreted as an RG-invariant gauge parameter. We also present the a...
[ { "created": "Tue, 26 Apr 2005 15:50:46 GMT", "version": "v1" }, { "created": "Mon, 22 Aug 2005 10:16:38 GMT", "version": "v2" } ]
2009-11-11
[ [ "Fischer", "Christian S.", "" ], [ "Zwanziger", "Daniel", "" ] ]
We consider the class of gauges that interpolates between Landau- and Coulomb-gauge QCD, and show the non-renormalisation of the two independent ghost-gluon vertices. This implies the existence of two RG-invariant running couplings, one of which is interpreted as an RG-invariant gauge parameter. We also present the asy...
hep-ph/9803282
Sasaki Ken
Ken Sasaki
Spin Structure Function g_2(x,Q^2) and Twist-3 Operators in large-N_C QCD
Corrected Ref.[15]
Phys.Rev.D58:094007,1998
10.1103/PhysRevD.58.094007
YNU-HEPTh-98-101
hep-ph
null
It is shown in the framework of the operator product expansion and the renormalization group method that the twist-3 part of flavour nonsinglet spin structure function g_2(x,Q^2) obeys a simple Dokshitzer-Gribov- Lipatov-Altarelli-Parisi (DGLAP) equation in the large N_C limit even in the case of massive quarks (N_C ...
[ { "created": "Mon, 9 Mar 1998 12:33:39 GMT", "version": "v1" }, { "created": "Tue, 10 Mar 1998 08:45:19 GMT", "version": "v2" } ]
2014-11-17
[ [ "Sasaki", "Ken", "" ] ]
It is shown in the framework of the operator product expansion and the renormalization group method that the twist-3 part of flavour nonsinglet spin structure function g_2(x,Q^2) obeys a simple Dokshitzer-Gribov- Lipatov-Altarelli-Parisi (DGLAP) equation in the large N_C limit even in the case of massive quarks (N_C is...
1307.2393
Andrey Kozhushko
Alexey Gulov, Andrey Kozhushko
Estimates for the Abelian $Z'$ Couplings from the LHC Data
revtex, 9 pages, 8 figures. Title and abstract rewritten, figures added, mixing angle investigated (thanks for the hint from the anonymous IJMPA referee). v3 coincides with the published version
Int. J. Mod. Phys. A 29, 1450001 (2014)
10.1142/S0217751X14500018
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper, we investigate the Drell-Yan process with the intermediate heavy $Z'$ boson. We use a general approach to the Abelian $Z'$ that utilizes the renormalization-group relations between the $Z'$ couplings and allows to reduce the number of unknown $Z'$ parameters significantly. In a newly proposed strategy,...
[ { "created": "Tue, 9 Jul 2013 10:28:39 GMT", "version": "v1" }, { "created": "Sun, 28 Jul 2013 07:07:16 GMT", "version": "v2" }, { "created": "Mon, 13 Jan 2014 18:47:26 GMT", "version": "v3" } ]
2014-01-14
[ [ "Gulov", "Alexey", "" ], [ "Kozhushko", "Andrey", "" ] ]
In this paper, we investigate the Drell-Yan process with the intermediate heavy $Z'$ boson. We use a general approach to the Abelian $Z'$ that utilizes the renormalization-group relations between the $Z'$ couplings and allows to reduce the number of unknown $Z'$ parameters significantly. In a newly proposed strategy, w...
2207.04126
Kamel Khelifa-Kerfa
K. Khelifa-Kerfa, Y. Delenda, N. Ziani
Jet shapes in H/V boson + jet with $k_t$ clustering at hadron colliders
Presented at DIS2022: XXIX International Workshop on Deep-Inelastic Scattering and Related Subjects, May 2 - 6, 2022, Santiago de Compostela, Spain
null
null
null
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present analytical calculations of the distribution of non-global jet shapes in Higgs/vector boson + jet production at hadron colliders. Within the eikonal-limit framework and implementing various jet algorithms, we compute the full distribution of the particular jet mass shape observable at 2-loops, including the...
[ { "created": "Fri, 8 Jul 2022 21:01:15 GMT", "version": "v1" } ]
2022-07-12
[ [ "Khelifa-Kerfa", "K.", "" ], [ "Delenda", "Y.", "" ], [ "Ziani", "N.", "" ] ]
We present analytical calculations of the distribution of non-global jet shapes in Higgs/vector boson + jet production at hadron colliders. Within the eikonal-limit framework and implementing various jet algorithms, we compute the full distribution of the particular jet mass shape observable at 2-loops, including the l...
hep-ph/0506280
Michael Andreas Schmidt
Manfred Lindner, Michael Ratz, Michael Andreas Schmidt
Renormalization Group Evolution of Dirac Neutrino Masses
19 pages, 5 figures; error in eq. 8 corrected, references added
JHEP0509:081,2005
10.1088/1126-6708/2005/09/081
TUM-HEP-589/05
hep-ph
null
There are good reasons why neutrinos could be Majorana particles, but there exist also a number of very good reasons why neutrinos could have Dirac masses. The latter option deserves more attention and we derive therefore analytic expressions describing the renormalization group evolution of mixing angles and of the ...
[ { "created": "Tue, 28 Jun 2005 09:46:29 GMT", "version": "v1" }, { "created": "Fri, 30 Sep 2005 20:02:04 GMT", "version": "v2" } ]
2009-11-11
[ [ "Lindner", "Manfred", "" ], [ "Ratz", "Michael", "" ], [ "Schmidt", "Michael Andreas", "" ] ]
There are good reasons why neutrinos could be Majorana particles, but there exist also a number of very good reasons why neutrinos could have Dirac masses. The latter option deserves more attention and we derive therefore analytic expressions describing the renormalization group evolution of mixing angles and of the CP...
hep-ph/9701347
Marc Flesch
W. Bernreuther, A. Brandenburg, and M. Flesch (RWTH Aachen)
QCD Corrections to Decay Distributions of Neutral Higgs Bosons with (In)definite CP Parity
32 pages, REVTeX, uses: psfig,amssym,aps,preprint 14 ps figures
Phys. Rev. D 56, 90 (1997)
10.1103/PhysRevD.56.90
PITHA 97/4
hep-ph
null
We compute the order $\alpha_s$ QCD corrections to the density matrix for the decay of a neutral Higgs boson $\phi$ with (in)definite CP parity into a quark antiquark pair, respectively the QED corrections for the decay into a pair of charged leptons. We classify and calculate single spin asymmetries and spin-spin co...
[ { "created": "Wed, 22 Jan 1997 12:46:43 GMT", "version": "v1" } ]
2016-08-24
[ [ "Bernreuther", "W.", "", "RWTH Aachen" ], [ "Brandenburg", "A.", "", "RWTH Aachen" ], [ "Flesch", "M.", "", "RWTH Aachen" ] ]
We compute the order $\alpha_s$ QCD corrections to the density matrix for the decay of a neutral Higgs boson $\phi$ with (in)definite CP parity into a quark antiquark pair, respectively the QED corrections for the decay into a pair of charged leptons. We classify and calculate single spin asymmetries and spin-spin corr...
2306.06854
Lei Meng
Junjie Cao, Lei Meng, Yuanfang Yue
Electron and Muon Anomalous Magnetic Moment in the $\mathbb{Z}_3$-NMSSM
38 pages, 4 figures, 6 tables
null
null
null
hep-ph
http://creativecommons.org/licenses/by/4.0/
Inspired by the recent measurements of the muon and electron anomalous magnetic moments, the rapid progress of the LHC search for supersymmetry, and the significantly improved sensitivities of dark matter direct detection experiments, we studied the supersymmetric contribution to the electron \texorpdfstring{$g-2$}{}...
[ { "created": "Mon, 12 Jun 2023 04:01:42 GMT", "version": "v1" } ]
2023-06-13
[ [ "Cao", "Junjie", "" ], [ "Meng", "Lei", "" ], [ "Yue", "Yuanfang", "" ] ]
Inspired by the recent measurements of the muon and electron anomalous magnetic moments, the rapid progress of the LHC search for supersymmetry, and the significantly improved sensitivities of dark matter direct detection experiments, we studied the supersymmetric contribution to the electron \texorpdfstring{$g-2$}{}, ...
1607.06812
Saul Ramos-Sanchez
Brenda Carballo-Perez, Eduardo Peinado, Saul Ramos-Sanchez
Delta(54) flavor phenomenology and strings
21 pages, 2 figures; v2: fig. and appendix added, matches the version published in JHEP
null
10.1007/JHEP12(2016)131
null
hep-ph hep-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Delta(54) can serve as a flavor symmetry in particle physics, but remains almost unexplored. We show that in a classification of semi-realistic Z3xZ3 heterotic string orbifolds, Delta(54) turns out to be the most natural flavor symmetry, providing additional motivation for its study. We revisit its phenomenological p...
[ { "created": "Fri, 22 Jul 2016 20:00:01 GMT", "version": "v1" }, { "created": "Fri, 23 Dec 2016 04:33:44 GMT", "version": "v2" } ]
2017-02-01
[ [ "Carballo-Perez", "Brenda", "" ], [ "Peinado", "Eduardo", "" ], [ "Ramos-Sanchez", "Saul", "" ] ]
Delta(54) can serve as a flavor symmetry in particle physics, but remains almost unexplored. We show that in a classification of semi-realistic Z3xZ3 heterotic string orbifolds, Delta(54) turns out to be the most natural flavor symmetry, providing additional motivation for its study. We revisit its phenomenological pot...
hep-ph/9504240
Lahanas Athanasios
A. B. Lahanas
Static Quantities of the W bosons in the MSSM
14 pages+2 figures , Latex, uses revtex[aps,aipbook,floats,epsfig] (The two figures in a separate uuencode file ). Talk given at the International Symposium on Gauge Boson self-interactions, UCLA, February 1-3, 1995 Los Angeles
null
10.1063/1.49297
null
hep-ph
null
I discuss the static quantities of the W boson, magnetic dipole and electric quadrupole moments, in the context of the minimal supersymmetric standard model, in which supersymmetry is broken by soft terms $A_o,\, m_o,\, M_{1/2}$. Following a renormalization group analysis it is found that the supersymmetric values of...
[ { "created": "Thu, 6 Apr 1995 08:04:46 GMT", "version": "v1" } ]
2009-10-28
[ [ "Lahanas", "A. B.", "" ] ]
I discuss the static quantities of the W boson, magnetic dipole and electric quadrupole moments, in the context of the minimal supersymmetric standard model, in which supersymmetry is broken by soft terms $A_o,\, m_o,\, M_{1/2}$. Following a renormalization group analysis it is found that the supersymmetric values of $...
hep-ph/0310118
Michael Trusov A.
I.M.Narodetskii, Yu.A.Simonov, M.A.Trusov, A.I.Veselov
Pentaquark spectrum in string dynamics
6 pages, 1 figure included, LaTeX2e; several references added; misprints corrected; to appear in Physics Letters B
Phys.Lett. B578 (2004) 318-322
10.1016/j.physletb.2003.11.010
null
hep-ph
null
The masses of $uudd\bar s $ and $uudd\bar d$ pentaquarks are evaluated in a framework of the Effective Hamiltonian approach to QCD using the Jaffe-Wilczek $[ud]^2\bar q$ approximation. The mass of the $[ud]^2\bar s$ state is found to be $\sim 300-500$ MeV higher than the observed $\Theta^+(1540)$ mass.
[ { "created": "Thu, 9 Oct 2003 17:05:07 GMT", "version": "v1" }, { "created": "Wed, 15 Oct 2003 14:39:43 GMT", "version": "v2" }, { "created": "Mon, 1 Dec 2003 15:57:41 GMT", "version": "v3" } ]
2015-06-25
[ [ "Narodetskii", "I. M.", "" ], [ "Simonov", "Yu. A.", "" ], [ "Trusov", "M. A.", "" ], [ "Veselov", "A. I.", "" ] ]
The masses of $uudd\bar s $ and $uudd\bar d$ pentaquarks are evaluated in a framework of the Effective Hamiltonian approach to QCD using the Jaffe-Wilczek $[ud]^2\bar q$ approximation. The mass of the $[ud]^2\bar s$ state is found to be $\sim 300-500$ MeV higher than the observed $\Theta^+(1540)$ mass.
hep-ph/9406276
Stephen Man Hoe Wong
S. Peign\'e and S.M.H. Wong
Non-Debye Screening in Finite Temperature QCD
LPTHE-Orsay 94/46.12 pages (latex), (Due to the appearance of more recent related works, we changed our conclusion somewhat.)
Phys.Lett. B346 (1995) 322-328
10.1016/0370-2693(95)00020-L
null
hep-ph
null
We study the non-abelian, gauge invariant, screening potential between two charges in a quark-gluon plasma. Using Braaten and Pisarski resummed perturbation theory in temporal axial gauge, we find a repulsive power screened potential which behaves as $\sim 1/r^6$ at large distance. This questions either the physical ...
[ { "created": "Fri, 10 Jun 1994 14:11:38 GMT", "version": "v1" }, { "created": "Mon, 13 Jun 1994 21:42:58 GMT", "version": "v2" }, { "created": "Tue, 14 Jun 1994 14:01:50 GMT", "version": "v3" }, { "created": "Mon, 21 Nov 1994 19:52:49 GMT", "version": "v4" } ]
2009-10-28
[ [ "Peigné", "S.", "" ], [ "Wong", "S. M. H.", "" ] ]
We study the non-abelian, gauge invariant, screening potential between two charges in a quark-gluon plasma. Using Braaten and Pisarski resummed perturbation theory in temporal axial gauge, we find a repulsive power screened potential which behaves as $\sim 1/r^6$ at large distance. This questions either the physical me...
hep-ph/0212068
Georg Weiglein
Ayres Freitas, Sven Heinemeyer and Georg Weiglein
Two-Loop Results for M_W in the Standard Model and the MSSM
6 pages, Proceedings contribution to RADCOR 2002 - Loops & Legs 2002, Kloster Banz, Germany, Sept. 2002
Nucl.Phys.Proc.Suppl.116:331-335,2003
10.1016/S0920-5632(03)80194-9
DCPT/02/150, IPPP/02/75, FERMILAB-Conf-02/312-T, LMU 14/02
hep-ph
null
Recent higher-order results for the prediction of the W-boson mass, M_W, within the Standard Model are reviewed and an estimate of the remaining theoretical uncertainties of the electroweak precision observables is given. An updated version of a simple numerical parameterisation of the result for M_W is presented. Fu...
[ { "created": "Wed, 4 Dec 2002 18:22:54 GMT", "version": "v1" } ]
2009-11-07
[ [ "Freitas", "Ayres", "" ], [ "Heinemeyer", "Sven", "" ], [ "Weiglein", "Georg", "" ] ]
Recent higher-order results for the prediction of the W-boson mass, M_W, within the Standard Model are reviewed and an estimate of the remaining theoretical uncertainties of the electroweak precision observables is given. An updated version of a simple numerical parameterisation of the result for M_W is presented. Furt...
1209.5859
Rui-Lin Zhu
Cong-Feng Qiao, Peng Sun, Deshan Yang and Rui-Lin Zhu
$B_c$ Exclusive Decays to Charmonium and a Light Meson at Next-to-Leading Order Accuracy
20 pages, 7 figures and 5 tables
Phys. Rev. D 89, 034008 (2014)
10.1103/PhysRevD.89.034008
null
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this paper the next-to-leading order (NLO) corrections to $B_c$ meson exclusive decays to S-wave charmonia and light pseudoscalar or vector mesons, i.e. $\pi$, $K$, $\rho$, and $K^*$, are performed within non-relativistic (NR) QCD approach. The non-factorizable contribution is included, which is absent in traditio...
[ { "created": "Wed, 26 Sep 2012 08:05:50 GMT", "version": "v1" }, { "created": "Mon, 2 Dec 2013 20:15:04 GMT", "version": "v2" } ]
2014-02-12
[ [ "Qiao", "Cong-Feng", "" ], [ "Sun", "Peng", "" ], [ "Yang", "Deshan", "" ], [ "Zhu", "Rui-Lin", "" ] ]
In this paper the next-to-leading order (NLO) corrections to $B_c$ meson exclusive decays to S-wave charmonia and light pseudoscalar or vector mesons, i.e. $\pi$, $K$, $\rho$, and $K^*$, are performed within non-relativistic (NR) QCD approach. The non-factorizable contribution is included, which is absent in traditiona...
1002.4718
Juan Antonio Aguilar-Saavedra
J. A. Aguilar-Saavedra, A. Onofre
Using single top rapidity to measure V_td, V_ts, V_tb at hadron colliders
LaTeX 19 pages, 48 PS figures. A section added with estimations of systematics, LO/NLO comparison and a fast detector simulation. Final version to appear in PRD
Phys.Rev.D83:073003,2011
10.1103/PhysRevD.83.073003
null
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Single top production processes are usually regarded as the ones in which V_tb can be directly measured at hadron colliders. We show that the analysis of the single top rapidity distribution in t-channel and tW production can also set direct limits on V_td. At LHC with 10 fb^-1 at 14 TeV the combined limits on V_td m...
[ { "created": "Thu, 25 Feb 2010 12:14:11 GMT", "version": "v1" }, { "created": "Tue, 8 Mar 2011 08:51:10 GMT", "version": "v2" } ]
2011-04-22
[ [ "Aguilar-Saavedra", "J. A.", "" ], [ "Onofre", "A.", "" ] ]
Single top production processes are usually regarded as the ones in which V_tb can be directly measured at hadron colliders. We show that the analysis of the single top rapidity distribution in t-channel and tW production can also set direct limits on V_td. At LHC with 10 fb^-1 at 14 TeV the combined limits on V_td may...
2110.12240
Jorge Alda
Jorge Alda, Jaume Guasch, Siannah Penaranda
Exploring B-physics anomalies at colliders
4 pages, 2 figures; contribution to the proceedings of the EPS-HEP 2021 conference
null
null
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Several experimental measurements of $B$ meson decays, in tension with Standard Model predictions, exhibit large sources of Lepton Flavour Universality violation. We perform an analysis of the effects of the global fits to the Wilson coefficients assuming a model independent effective Hamiltonian approach, by includi...
[ { "created": "Sat, 23 Oct 2021 15:20:17 GMT", "version": "v1" } ]
2021-10-26
[ [ "Alda", "Jorge", "" ], [ "Guasch", "Jaume", "" ], [ "Penaranda", "Siannah", "" ] ]
Several experimental measurements of $B$ meson decays, in tension with Standard Model predictions, exhibit large sources of Lepton Flavour Universality violation. We perform an analysis of the effects of the global fits to the Wilson coefficients assuming a model independent effective Hamiltonian approach, by including...
hep-ph/0208257
Adam Ritz
D.A. Demir, M. Pospelov, A. Ritz
Hadronic EDMs, the Weinberg Operator, and Light Gluinos
6 pages, RevTeX, 3 figures; v2: references added; v3: typos corrected, to appear in Phys. Rev. D
Phys.Rev. D67 (2003) 015007
10.1103/PhysRevD.67.015007
null
hep-ph
null
We re-examine questions concerning the contribution of the three-gluon Weinberg operator to the electric dipole moment of the neutron, and provide several QCD sum rule-based arguments that the result is smaller than - but nevertheless consistent with - estimates which invoke naive dimensional analysis. We also point ...
[ { "created": "Wed, 28 Aug 2002 15:04:56 GMT", "version": "v1" }, { "created": "Fri, 30 Aug 2002 16:11:48 GMT", "version": "v2" }, { "created": "Wed, 8 Jan 2003 11:46:20 GMT", "version": "v3" } ]
2009-11-07
[ [ "Demir", "D. A.", "" ], [ "Pospelov", "M.", "" ], [ "Ritz", "A.", "" ] ]
We re-examine questions concerning the contribution of the three-gluon Weinberg operator to the electric dipole moment of the neutron, and provide several QCD sum rule-based arguments that the result is smaller than - but nevertheless consistent with - estimates which invoke naive dimensional analysis. We also point ou...
1801.07928
Avik Paul
Avik Paul, Debasish Majumdar, Kamakshya Prasad Modak
Neutron Star Cooling via Axion Emission by Nucleon-Nucleon Axion Bremsstrahlung
17 pages, 10 Figures, minor changes
null
null
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Neutron stars generally cools off by the emission of gamma rays and neutrinos. But axions can also be produced inside a neutron star by the process of nucleon-nucleon axion bremsstrahlung. The escape of these axions adds to the cooling process of neutron star. We explore the nature of cooling of neutron stars includi...
[ { "created": "Wed, 24 Jan 2018 11:13:18 GMT", "version": "v1" }, { "created": "Tue, 30 Jan 2018 08:49:24 GMT", "version": "v2" }, { "created": "Thu, 7 Feb 2019 13:22:03 GMT", "version": "v3" } ]
2019-02-08
[ [ "Paul", "Avik", "" ], [ "Majumdar", "Debasish", "" ], [ "Modak", "Kamakshya Prasad", "" ] ]
Neutron stars generally cools off by the emission of gamma rays and neutrinos. But axions can also be produced inside a neutron star by the process of nucleon-nucleon axion bremsstrahlung. The escape of these axions adds to the cooling process of neutron star. We explore the nature of cooling of neutron stars including...
1004.1555
Wayne de Paula
W. de Paula and T. Frederico
Mesonic Spectrum from a Dynamical Gravity/Gauge model
Talk given at Light Cone 2009: Relativistic Hadronic and Particle Physics (LC 2009), Sao Jose dos Campos, Brazil, 8-13 Jul 2009.
null
10.1016/j.nuclphysbps.2010.02.014
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Within a formulation of a Dynamical AdS/QCD model we calculate the spectrum of light flavored mesons. The background fields of the model correspond to an IR deformed Anti de Sitter metric coupled to a dilaton field. Confinement comes as a consequence of the dilaton dynamics coupled to gravity. Additionally to the Reg...
[ { "created": "Fri, 9 Apr 2010 13:46:51 GMT", "version": "v1" } ]
2015-05-18
[ [ "de Paula", "W.", "" ], [ "Frederico", "T.", "" ] ]
Within a formulation of a Dynamical AdS/QCD model we calculate the spectrum of light flavored mesons. The background fields of the model correspond to an IR deformed Anti de Sitter metric coupled to a dilaton field. Confinement comes as a consequence of the dilaton dynamics coupled to gravity. Additionally to the Regge...
2211.04403
Rohan Pramanick
Rohan Pramanick, Tirtha Sankar Ray and Avirup Shaw
Neutrino mass and leptogenesis in a hybrid seesaw model with a spontaneously broken CP
28 pages, 4 tables, 10 captioned figures; updated text, new appendix added
JHEP 06 (2023) 099
10.1007/JHEP06(2023)099
null
hep-ph
http://creativecommons.org/licenses/by/4.0/
We introduce a novel hybrid framework combining type I and type II seesaw models for neutrino mass where a complex vacuum expectation value of a singlet scalar field breaks CP spontaneously. Using pragmatic organizing symmetries we demonstrate that such a model can simultaneously explain the neutrino oscillation data...
[ { "created": "Tue, 8 Nov 2022 17:45:11 GMT", "version": "v1" }, { "created": "Wed, 31 May 2023 17:58:17 GMT", "version": "v2" } ]
2023-06-21
[ [ "Pramanick", "Rohan", "" ], [ "Ray", "Tirtha Sankar", "" ], [ "Shaw", "Avirup", "" ] ]
We introduce a novel hybrid framework combining type I and type II seesaw models for neutrino mass where a complex vacuum expectation value of a singlet scalar field breaks CP spontaneously. Using pragmatic organizing symmetries we demonstrate that such a model can simultaneously explain the neutrino oscillation data a...
1205.0362
A. Tolga Tasci
A. T. Tasci, A. Senol and C. Verep
Analyzing the anomalous dipole moment type couplings of heavy quarks with FCNC interactions at the CLIC
13 pages, 10 figures
Advances in High Energy Physics, vol. 2014, Article ID 717848, 2014
10.1155/2014/717848
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this study we examine both anomalous magnetic and dipole moment type couplings of a heavy quark via its single production with subsequent dominant Standard Model decay modes at the Compact Linear Collider (CLIC). The signal and background cross sections are analyzed for heavy quark masses 600 and 700 GeV. We make ...
[ { "created": "Wed, 2 May 2012 09:58:17 GMT", "version": "v1" }, { "created": "Wed, 9 May 2012 19:12:17 GMT", "version": "v2" }, { "created": "Thu, 10 Apr 2014 07:26:17 GMT", "version": "v3" } ]
2014-04-15
[ [ "Tasci", "A. T.", "" ], [ "Senol", "A.", "" ], [ "Verep", "C.", "" ] ]
In this study we examine both anomalous magnetic and dipole moment type couplings of a heavy quark via its single production with subsequent dominant Standard Model decay modes at the Compact Linear Collider (CLIC). The signal and background cross sections are analyzed for heavy quark masses 600 and 700 GeV. We make th...
hep-ph/9907201
Stephen Mrenna
S. Mrenna (Univ. of California, Davis)
Technihadron Production and Decay at LEP2
18 pages (5 figures) in Latex format
Phys.Lett. B461 (1999) 352-362
10.1016/S0370-2693(99)00867-9
UCD-99-13
hep-ph
null
The simple "straw-man" model of low-scale technicolor contains light color--singlet technihadrons, which mix with the electroweak gauge bosons. We present lepton collider production rates at the parton level, and show that experiments at LEP2 may be sensitive to the presence of technirho and techniomega states with m...
[ { "created": "Thu, 1 Jul 1999 23:49:32 GMT", "version": "v1" } ]
2016-09-06
[ [ "Mrenna", "S.", "", "Univ. of California, Davis" ] ]
The simple "straw-man" model of low-scale technicolor contains light color--singlet technihadrons, which mix with the electroweak gauge bosons. We present lepton collider production rates at the parton level, and show that experiments at LEP2 may be sensitive to the presence of technirho and techniomega states with mas...
hep-ph/0411296
Stefan Scherer
Stefan Scherer (J.W.Goethe-Universitaet)
Exotic hadrons from dynamical clustering of quarks in ultrarelativistic heavy ion collisions
4 pages, 5 figures, to appear in the proceedings of Strangeness in Quark Matter 2004 (SQM2004), Cape Town, South Africa, 15-20 September 2004
J.Phys. G31 (2005) S1199-S1202
10.1088/0954-3899/31/6/087
null
hep-ph
null
Results from a model study on the formation of exotic quark clusters at the hadronization stage of a heavy ion collision are presented. The dynamical quark molecular dynamics (qMD) model which is used is sketched, and results for exotica made of up to six (anti-)quarks are shown. The second part focuses on pentaquark...
[ { "created": "Mon, 22 Nov 2004 15:55:13 GMT", "version": "v1" } ]
2009-11-10
[ [ "Scherer", "Stefan", "", "J.W.Goethe-Universitaet" ] ]
Results from a model study on the formation of exotic quark clusters at the hadronization stage of a heavy ion collision are presented. The dynamical quark molecular dynamics (qMD) model which is used is sketched, and results for exotica made of up to six (anti-)quarks are shown. The second part focuses on pentaquarks....
hep-ph/9807359
John LoSecco
J.M. LoSecco
Problems with Atmospheric Neutrino Oscillations
10 pages, 7 figures
null
null
UNDPDK-98-02
hep-ph hep-ex
null
The neutrino oscillation hypothesis does a poor job of representing the atmospheric neutrino anomaly. The anomaly is observed over 4 decades in path length and at least a factor of 30 in energy. This restricts the potential oscillation solutions to those with large amplitudes and mixing mass differences that are rule...
[ { "created": "Mon, 13 Jul 1998 14:50:01 GMT", "version": "v1" } ]
2007-05-23
[ [ "LoSecco", "J. M.", "" ] ]
The neutrino oscillation hypothesis does a poor job of representing the atmospheric neutrino anomaly. The anomaly is observed over 4 decades in path length and at least a factor of 30 in energy. This restricts the potential oscillation solutions to those with large amplitudes and mixing mass differences that are ruled ...
hep-ph/9511255
Stefano Bertolini
V. Antonelli, S. Bertolini, J.O. Eeg, M. Fabbrichesi, E.I. Lashin
The $\Delta S = 1$ Weak Chiral Lagrangian as the Effective Theory of the Chiral Quark Model
Revised version to appear in Nucl. Phys. B 48 pages, uuencoded LATEX file including 4 eps figures
Nucl.Phys. B469 (1996) 143-180
10.1016/0550-3213(96)00144-7
SISSA 43/95/EP
hep-ph
null
We use the chiral quark model to estimate the coefficients of the weak chiral lagrangian as obtained from the bosonization of the ten relevant operators of the $\Delta S = 1$ effective quark lagrangian. All contributions of order $N_c^2$ as well as $N_c$ and $\alpha_s N_c$ are included. The chiral coefficients are gi...
[ { "created": "Tue, 7 Nov 1995 08:20:55 GMT", "version": "v1" }, { "created": "Tue, 14 Nov 1995 11:43:04 GMT", "version": "v2" }, { "created": "Wed, 13 Mar 1996 15:03:10 GMT", "version": "v3" }, { "created": "Tue, 11 Jun 1996 08:16:15 GMT", "version": "v4" } ]
2009-10-28
[ [ "Antonelli", "V.", "" ], [ "Bertolini", "S.", "" ], [ "Eeg", "J. O.", "" ], [ "Fabbrichesi", "M.", "" ], [ "Lashin", "E. I.", "" ] ]
We use the chiral quark model to estimate the coefficients of the weak chiral lagrangian as obtained from the bosonization of the ten relevant operators of the $\Delta S = 1$ effective quark lagrangian. All contributions of order $N_c^2$ as well as $N_c$ and $\alpha_s N_c$ are included. The chiral coefficients are give...
1210.7153
Enrique Ruiz Arriola
Enrique Ruiz Arriola, Wojciech Broniowski, Pere Masjuan
Hadron resonances, large Nc, and the half-width rule
6 pages, 4 figures. Presented by ERA at Light Cone 2012, Cracow, 8-13 July 2012
null
null
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We suggest using the half-width rule to make an estimate of the 1/Nc errors in hadronic models containing resonances. We show simple consequences ranging from the analysis of meson Regge trajectories, the hadron resonance gas at finite temperature and generalized hadronic form factors.
[ { "created": "Fri, 26 Oct 2012 14:22:09 GMT", "version": "v1" } ]
2012-10-29
[ [ "Arriola", "Enrique Ruiz", "" ], [ "Broniowski", "Wojciech", "" ], [ "Masjuan", "Pere", "" ] ]
We suggest using the half-width rule to make an estimate of the 1/Nc errors in hadronic models containing resonances. We show simple consequences ranging from the analysis of meson Regge trajectories, the hadron resonance gas at finite temperature and generalized hadronic form factors.
1009.6095
Giovanni Marco Pruna Mr
L. Basso, A. Belyaev, S. Moretti and G. M. Pruna
Higgs phenomenology in the minimal $B-L$ extension of the Standard Model at LHC
6 pages, 3 figures, PASCOS2010 International Symposium proceeding
J.Phys.Conf.Ser.259:012062,2010
10.1088/1742-6596/259/1/012062
10-32
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present some phenomenology of the Higgs sector of the Minimal $B-L$ U(1) Extension of the Standard Model at the Large Hadron Collider. In this model, the existence of an extra gauge boson ($Z'$) and an extra scalar (heavy Higgs) are predicted as naturally related with the breaking of the $B-L$ (baryon minus lepton...
[ { "created": "Thu, 30 Sep 2010 10:37:58 GMT", "version": "v1" }, { "created": "Mon, 1 Nov 2010 23:55:29 GMT", "version": "v2" } ]
2011-01-03
[ [ "Basso", "L.", "" ], [ "Belyaev", "A.", "" ], [ "Moretti", "S.", "" ], [ "Pruna", "G. M.", "" ] ]
We present some phenomenology of the Higgs sector of the Minimal $B-L$ U(1) Extension of the Standard Model at the Large Hadron Collider. In this model, the existence of an extra gauge boson ($Z'$) and an extra scalar (heavy Higgs) are predicted as naturally related with the breaking of the $B-L$ (baryon minus lepton n...
hep-ph/0312299
Hans-Christian Pauli
Hans-Christian Pauli
A linear potential in a light cone QCD inspired model
LaTeX2e, 5 pages, 11 references. Paper 4 of 5
null
null
null
hep-ph
null
The general equation from previous work is specialized to a linear potential $V(r)=-a+F r$ acting in the space of spherically symmetric S wave functions. The fine and hyperfine interaction creates then a $\frac1r$-dependence in the effective potential energy equation and a position dependent mass $\widetilde m(r)$ in...
[ { "created": "Sat, 20 Dec 2003 19:21:56 GMT", "version": "v1" } ]
2016-08-16
[ [ "Pauli", "Hans-Christian", "" ] ]
The general equation from previous work is specialized to a linear potential $V(r)=-a+F r$ acting in the space of spherically symmetric S wave functions. The fine and hyperfine interaction creates then a $\frac1r$-dependence in the effective potential energy equation and a position dependent mass $\widetilde m(r)$ in t...
hep-ph/0311011
Dr. Rukmani Mohanta
A.K.Giri and R.Mohanta
Direct CP violation and new physics effects in the decay mode B^+ -> phi K^+
17 pages, 2 figures, typos corrected, more references added, to be published in Modern Physics Letters A
Mod.Phys.Lett. A19 (2004) 1903-1918
10.1142/S021773230401518X
null
hep-ph
null
We study the direct CP violation effect in the decay mode $B^+ \to \phi K^+$. This decay mode is dominated by the loop induced $\bar b \to \bar s s \bar s$ penguin diagram with a tiny contribution from annihilation diagram. Therefore, the standard model expectation of direct CP violation is negligibly small. Using QC...
[ { "created": "Sun, 2 Nov 2003 03:48:31 GMT", "version": "v1" }, { "created": "Tue, 4 Nov 2003 10:02:05 GMT", "version": "v2" }, { "created": "Tue, 29 Jun 2004 07:01:32 GMT", "version": "v3" } ]
2009-11-10
[ [ "Giri", "A. K.", "" ], [ "Mohanta", "R.", "" ] ]
We study the direct CP violation effect in the decay mode $B^+ \to \phi K^+$. This decay mode is dominated by the loop induced $\bar b \to \bar s s \bar s$ penguin diagram with a tiny contribution from annihilation diagram. Therefore, the standard model expectation of direct CP violation is negligibly small. Using QCD ...