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2012.00702
Jean-Philippe Lansberg
Jean-Philippe Lansberg, Melih Arslan Ozcelik
Curing the unphysical behaviour of NLO quarkonium production at the LHC and its relevance to constrain the gluon PDF at low scales
LaTeX, 23 pages, 58 figures, 1 table
null
10.1140/epjc/s10052-021-09258-7
null
hep-ph hep-ex nucl-ex nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We address the unphysical energy dependence of quarkonium-hadroproduction cross sections at Next-to-Leading Order (NLO) in alpha_S which we attribute to an over-subtraction in the factorisation of the collinear singularities inside the PDFs in the MSbar scheme. Such over- or under-subtractions have a limited phenomen...
[ { "created": "Tue, 1 Dec 2020 18:05:27 GMT", "version": "v1" } ]
2021-06-30
[ [ "Lansberg", "Jean-Philippe", "" ], [ "Ozcelik", "Melih Arslan", "" ] ]
We address the unphysical energy dependence of quarkonium-hadroproduction cross sections at Next-to-Leading Order (NLO) in alpha_S which we attribute to an over-subtraction in the factorisation of the collinear singularities inside the PDFs in the MSbar scheme. Such over- or under-subtractions have a limited phenomenol...
2104.03231
Niko Koivunen
Juan C. Criado, Abdelhak Djouadi, Niko Koivunen, Kristjan M\"u\"ursepp, Martti Raidal, Hardi Veerm\"ae
Confronting spin-3/2 and other new fermions with the muon g-2 measurement
References updated, typos fixed and comments added; results unchanged
null
10.1016/j.physletb.2021.136491
null
hep-ph hep-ex hep-th
http://creativecommons.org/licenses/by/4.0/
The new measurement of the muon's anomalous magnetic moment released by the Muon g-2 experiment at Fermilab sets strong constraints on the properties of many new particles. Using an effective field theory approach to the interactions of higher-spin fields, we evaluate the contribution of an electrically neutral and c...
[ { "created": "Wed, 7 Apr 2021 16:30:16 GMT", "version": "v1" }, { "created": "Thu, 8 Apr 2021 14:22:41 GMT", "version": "v2" } ]
2021-07-07
[ [ "Criado", "Juan C.", "" ], [ "Djouadi", "Abdelhak", "" ], [ "Koivunen", "Niko", "" ], [ "Müürsepp", "Kristjan", "" ], [ "Raidal", "Martti", "" ], [ "Veermäe", "Hardi", "" ] ]
The new measurement of the muon's anomalous magnetic moment released by the Muon g-2 experiment at Fermilab sets strong constraints on the properties of many new particles. Using an effective field theory approach to the interactions of higher-spin fields, we evaluate the contribution of an electrically neutral and col...
hep-ph/9911254
Nikita Agasyan
N.O. Agasian, I.A. Shushpanov (ITEP, Moscow)
The Quark and Gluon Condensates and Low-Energy QCD Theorems in a Magnetic Field
LaTeX, 9 pages, 2 figures; minor corrections
Phys.Lett. B472 (2000) 143-149
10.1016/S0370-2693(99)01414-8
ITEP-PH-11/99
hep-ph
null
The low-energy QCD theorems are generalized in the presence of a constant magnetic field H. Two-loop approximation for the vacuum energy density in the framework of the chiral perturbation theory was obtained and the quark and gluon condensates were found as the functions of H.
[ { "created": "Fri, 5 Nov 1999 16:01:31 GMT", "version": "v1" }, { "created": "Tue, 16 Nov 1999 15:47:34 GMT", "version": "v2" } ]
2009-10-31
[ [ "Agasian", "N. O.", "", "ITEP, Moscow" ], [ "Shushpanov", "I. A.", "", "ITEP, Moscow" ] ]
The low-energy QCD theorems are generalized in the presence of a constant magnetic field H. Two-loop approximation for the vacuum energy density in the framework of the chiral perturbation theory was obtained and the quark and gluon condensates were found as the functions of H.
hep-ph/0309095
Wolfgang Schweiger
C. F. Berger (INFN, Turin) and W. Schweiger (Graz U.)
Hard exclusive baryon-antibaryon production in 2-$\gamma$ collisions
7 pages, 2 figures; v2: institutions updated, paper unchanged
Fizika B13 (2004) 75-80
null
null
hep-ph
null
We present a perturbative calculation of baryon pair production in two-photon collisions, $\gamma \gamma \to B \bar{B}$, in which baryons are treated as quark-diquark systems. Our approach accounts for constituent mass effects in a systematic way. Taking the diquark-model parameters from foregoing studies of other el...
[ { "created": "Tue, 9 Sep 2003 17:08:42 GMT", "version": "v1" }, { "created": "Wed, 10 Sep 2003 07:52:52 GMT", "version": "v2" } ]
2007-05-23
[ [ "Berger", "C. F.", "", "INFN, Turin" ], [ "Schweiger", "W.", "", "Graz U." ] ]
We present a perturbative calculation of baryon pair production in two-photon collisions, $\gamma \gamma \to B \bar{B}$, in which baryons are treated as quark-diquark systems. Our approach accounts for constituent mass effects in a systematic way. Taking the diquark-model parameters from foregoing studies of other elec...
hep-ph/0607035
Thorsten Renk
Thorsten Renk
Signatures of Mach Shocks at RHIC
5 pages, 2 figures, Talk given at the Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions, Hot Quarks 2006, Villasimius, Italy, May 15-20 2006
Eur.Phys.J.C49:13-17,2007
10.1140/epjc/s10052-006-0066-9
null
hep-ph
null
Hard partons propagating through hot and dense matter loose energy, leading to the observed depletion of hard hadron spectra in nucleus nucleus collision as compared to scaled proton proton collisions. This lost energy has to reappear in the medium due to the conservation of energy. Apart from heating the medium, the...
[ { "created": "Tue, 4 Jul 2006 10:55:16 GMT", "version": "v1" } ]
2011-09-13
[ [ "Renk", "Thorsten", "" ] ]
Hard partons propagating through hot and dense matter loose energy, leading to the observed depletion of hard hadron spectra in nucleus nucleus collision as compared to scaled proton proton collisions. This lost energy has to reappear in the medium due to the conservation of energy. Apart from heating the medium, there...
1011.2447
Jacob Bourjaily
Jacob L. Bourjaily
Efficient Tree-Amplitudes in N=4: Automatic BCFW Recursion in Mathematica
40 pages. Mathematica package "bcfw" and a demonstration notebook is included with this submission
null
null
null
hep-ph hep-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We describe an efficient implementation of the BCFW recursion relations for tree-amplitudes in N=4 super Yang-Mills, which can generate analytic formulae for general N^kMHV colour-ordered helicity-amplitudes-which, in particular, includes all those of non-supersymmetric Yang-Mills. This note accompanies the public re...
[ { "created": "Wed, 10 Nov 2010 18:00:11 GMT", "version": "v1" } ]
2010-11-11
[ [ "Bourjaily", "Jacob L.", "" ] ]
We describe an efficient implementation of the BCFW recursion relations for tree-amplitudes in N=4 super Yang-Mills, which can generate analytic formulae for general N^kMHV colour-ordered helicity-amplitudes-which, in particular, includes all those of non-supersymmetric Yang-Mills. This note accompanies the public rele...
1508.07930
Julia Gehrlein
Julia Gehrlein, Serguey T. Petcov, Martin Spinrath, Xinyi Zhang
Leptogenesis in an SU(5) x A5 Golden Ratio Flavour Model: Addendum
15 pages, 5 figures; version published in NPB
Nucl. Phys. B899 (2015) 617-630
10.1016/j.nuclphysb.2015.08.019
SISSA 33/2015 FISI, IPMU15-0118, TTP15-024
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We derive and discuss the solution of the Boltzmann equations for leptogenesis in a phenomenologically viable SU(5) x A5 golden ratio flavour model proposed in arXiv:1410.2057 [hep-ph], arXiv:1502.00110 [hep-ph] . The model employs, in particular, the seesaw mechanism of neutrino mass generation. We find that the res...
[ { "created": "Mon, 31 Aug 2015 17:40:42 GMT", "version": "v1" } ]
2015-09-01
[ [ "Gehrlein", "Julia", "" ], [ "Petcov", "Serguey T.", "" ], [ "Spinrath", "Martin", "" ], [ "Zhang", "Xinyi", "" ] ]
We derive and discuss the solution of the Boltzmann equations for leptogenesis in a phenomenologically viable SU(5) x A5 golden ratio flavour model proposed in arXiv:1410.2057 [hep-ph], arXiv:1502.00110 [hep-ph] . The model employs, in particular, the seesaw mechanism of neutrino mass generation. We find that the resul...
2401.10125
V\'ictor L\'opez-Pardo
N\'estor Armesto, Miguel \'Angel Escobedo, Elena G. Ferreiro and V\'ictor L\'opez-Pardo
A potential approach to the $X(3872)$ thermal behavior
12 pages, 7 figures
Physics Letters B, 854 (2024) 138760
10.1016/j.physletb.2024.138760
null
hep-ph nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study the potential of $X(3872)$ at finite temperature in the Born-Oppenheimer approximation under the assumption that it is a tetraquark. We argue that, at large number of colors, it is a good approximation to assume that the potential consists in a real part plus a constant imaginary term. The real part is then ...
[ { "created": "Thu, 18 Jan 2024 16:55:18 GMT", "version": "v1" }, { "created": "Mon, 22 Jan 2024 15:59:49 GMT", "version": "v2" }, { "created": "Fri, 21 Jun 2024 11:27:16 GMT", "version": "v3" } ]
2024-06-24
[ [ "Armesto", "Néstor", "" ], [ "Escobedo", "Miguel Ángel", "" ], [ "Ferreiro", "Elena G.", "" ], [ "López-Pardo", "Víctor", "" ] ]
We study the potential of $X(3872)$ at finite temperature in the Born-Oppenheimer approximation under the assumption that it is a tetraquark. We argue that, at large number of colors, it is a good approximation to assume that the potential consists in a real part plus a constant imaginary term. The real part is then co...
1405.6836
Sudhanwa Patra Dr.
Sudhanwa Patra and Prativa Pritimita (Siksha 'O' Anusandhan University, Bhubaneswar)
Post-Sphaleron baryogenesis and $n-\bar{n}$ oscillation in non-SUSY SO(10) GUT with gauge coupling unification and proton decay
v2: 28 pages, matches the version to be published in European Physical Journal C
null
10.1140/epjc/s10052-014-3078-x
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Post-sphaleron baryogenesis, a fresh and profound mechanism of baryogenesis accounts for the matter-antimatter asymmetry of our present universe in a framework of Pati-Salam symmetry. We attempt here to embed this mechanism in a non-SUSY SO(10) grand unified theory by reviving a novel symmetry breaking chain with Pat...
[ { "created": "Tue, 27 May 2014 08:59:49 GMT", "version": "v1" }, { "created": "Tue, 16 Sep 2014 10:57:27 GMT", "version": "v2" } ]
2015-06-19
[ [ "Patra", "Sudhanwa", "", "Siksha 'O' Anusandhan\n University, Bhubaneswar" ], [ "Pritimita", "Prativa", "", "Siksha 'O' Anusandhan\n University, Bhubaneswar" ] ]
Post-sphaleron baryogenesis, a fresh and profound mechanism of baryogenesis accounts for the matter-antimatter asymmetry of our present universe in a framework of Pati-Salam symmetry. We attempt here to embed this mechanism in a non-SUSY SO(10) grand unified theory by reviving a novel symmetry breaking chain with Pati-...
1602.01110
Dreyer Fr\'ed\'eric
Mrinal Dasgupta, Fr\'ed\'eric A. Dreyer, Gavin P. Salam, Gregory Soyez
Inclusive jet spectrum for small-radius jets
42 pages, 24 figures, additional material at http://microjets.hepforge.org/, updated to match published version
null
10.1007/JHEP06(2016)057
CERN-TH/2016-020
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Following on our earlier work on leading-logarithmic (LLR) resummations for the properties of jets with a small radius, R, we here examine the phenomenological considerations for the inclusive jet spectrum. We discuss how to match the NLO predictions with small-R resummation. As part of the study we propose a new, ph...
[ { "created": "Tue, 2 Feb 2016 21:03:04 GMT", "version": "v1" }, { "created": "Sat, 23 Jul 2016 11:32:38 GMT", "version": "v2" } ]
2016-07-26
[ [ "Dasgupta", "Mrinal", "" ], [ "Dreyer", "Frédéric A.", "" ], [ "Salam", "Gavin P.", "" ], [ "Soyez", "Gregory", "" ] ]
Following on our earlier work on leading-logarithmic (LLR) resummations for the properties of jets with a small radius, R, we here examine the phenomenological considerations for the inclusive jet spectrum. We discuss how to match the NLO predictions with small-R resummation. As part of the study we propose a new, phys...
hep-ph/9608491
Patrick Labelle
Patrick Labelle (McGill University)
Effective field theories for QED bound states: extending Nonrelativistic QED to study retardation effects
39 pages, 9 Postscript figures, uses Rev.tex V3.0 and epsf.tex
Phys.Rev.D58:093013,1998
10.1103/PhysRevD.58.093013
McGill/96-33
hep-ph atom-ph
null
Nonrelativistic QED bound states are difficult to study because of the presence of at least three widely different scales: the masses, three-momenta ($p_i$) and kinetic energies ($K_i$) of the constituents. Nonrelativistic QED (NRQED), an effective field theory developed by Caswell and Lepage, simplifies greatly boun...
[ { "created": "Thu, 29 Aug 1996 18:27:29 GMT", "version": "v1" } ]
2011-07-19
[ [ "Labelle", "Patrick", "", "McGill University" ] ]
Nonrelativistic QED bound states are difficult to study because of the presence of at least three widely different scales: the masses, three-momenta ($p_i$) and kinetic energies ($K_i$) of the constituents. Nonrelativistic QED (NRQED), an effective field theory developed by Caswell and Lepage, simplifies greatly bound ...
hep-ph/9307285
null
G. Ecker, H. Neufeld and A. Pich
Non-Leptonic Kaon Decays and the Chiral Anomaly
LaTeX, 31 pages (3 figures, not included), CERN-TH.6920/93
Nucl.Phys. B413 (1994) 321-352
10.1016/0550-3213(94)90623-8
null
hep-ph
null
An investigation is performed of all non-leptonic kaon decays sensitive to the chiral anomaly. Within the framework of chiral perturbation theory, there are two classes of anomalous amplitudes at $O(p^4)$: reducible and direct contributions. Only radiative transitions are affected by the anomaly. The phenomenology of...
[ { "created": "Fri, 16 Jul 1993 15:43:07 GMT", "version": "v1" } ]
2009-10-22
[ [ "Ecker", "G.", "" ], [ "Neufeld", "H.", "" ], [ "Pich", "A.", "" ] ]
An investigation is performed of all non-leptonic kaon decays sensitive to the chiral anomaly. Within the framework of chiral perturbation theory, there are two classes of anomalous amplitudes at $O(p^4)$: reducible and direct contributions. Only radiative transitions are affected by the anomaly. The phenomenology of t...
hep-ph/0005059
Guetta Dafne
Dafne Guetta and Paul Singer
$\omega-\rho$ Mixing and the $\omega\to\pi\pi\gamma$ Decay
10 pages, LaTeX, 1 ps-figure. Submitted to Phys. Rev. D
Phys.Rev. D63 (2001) 017502
10.1103/PhysRevD.63.017502
null
hep-ph
null
We reexamine the $\omega \to \pi^{0} \pi^{0} \gamma $ decay, adding the effect of $\omega-\rho$ mixing to the amplitude calculated with the aid of chiral perturbation theory and vector meson dominance. We predict the neutral decay to occur with a width of $\Gamma($\omega \to \pi^{0} \pi^{0} \gamma $) =(390\pm96) {\rm...
[ { "created": "Sat, 6 May 2000 17:45:49 GMT", "version": "v1" }, { "created": "Sat, 22 Jul 2000 13:48:07 GMT", "version": "v2" } ]
2009-10-31
[ [ "Guetta", "Dafne", "" ], [ "Singer", "Paul", "" ] ]
We reexamine the $\omega \to \pi^{0} \pi^{0} \gamma $ decay, adding the effect of $\omega-\rho$ mixing to the amplitude calculated with the aid of chiral perturbation theory and vector meson dominance. We predict the neutral decay to occur with a width of $\Gamma($\omega \to \pi^{0} \pi^{0} \gamma $) =(390\pm96) {\rm e...
1503.00006
Srimoyee Sen
Thomas D. Cohen and Srimoyee Sen
Deconfinement Transition at High Isospin Chemical Potential and Low Temperature
Added corrections to the speed of Goldstone modes and rephrased abstract
null
10.1016/j.nuclphysa.2015.07.018
null
hep-ph hep-th nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We consider QCD with two degenerate flavors of light quarks(up and down) at asymptotically high isospin chemical potential with zero baryon chemical potential and calculate for the first time a quantitative expression for the critical temperature of the deconfinement transition in this regime. At high isospin chemica...
[ { "created": "Fri, 27 Feb 2015 21:00:10 GMT", "version": "v1" }, { "created": "Thu, 18 Jun 2015 19:30:50 GMT", "version": "v2" } ]
2015-12-09
[ [ "Cohen", "Thomas D.", "" ], [ "Sen", "Srimoyee", "" ] ]
We consider QCD with two degenerate flavors of light quarks(up and down) at asymptotically high isospin chemical potential with zero baryon chemical potential and calculate for the first time a quantitative expression for the critical temperature of the deconfinement transition in this regime. At high isospin chemical ...
0803.0695
Gionata Luisoni
T.Gehrmann, G.Luisoni and H.Stenzel
Matching NLLA+NNLO for event shape distributions
14 pages, 18 figures; typos corrected, published version
Phys.Lett.B664:265-273,2008
10.1016/j.physletb.2008.05.023
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study the matching of the next-to-leading logarithmic approximation (NLLA) onto the fixed next-to-next-to-leading order (NNLO) calculation for event shape distributions in electron-positron annihilation. The resulting theoretical predictions combine all precision QCD knowledge on the distributions, and are theoret...
[ { "created": "Wed, 5 Mar 2008 16:20:31 GMT", "version": "v1" }, { "created": "Thu, 13 Mar 2008 07:45:34 GMT", "version": "v2" }, { "created": "Mon, 5 May 2008 13:59:32 GMT", "version": "v3" }, { "created": "Tue, 15 Jul 2008 14:27:10 GMT", "version": "v4" } ]
2008-11-26
[ [ "Gehrmann", "T.", "" ], [ "Luisoni", "G.", "" ], [ "Stenzel", "H.", "" ] ]
We study the matching of the next-to-leading logarithmic approximation (NLLA) onto the fixed next-to-next-to-leading order (NNLO) calculation for event shape distributions in electron-positron annihilation. The resulting theoretical predictions combine all precision QCD knowledge on the distributions, and are theoretic...
2406.09237
Andrei Poblaguev
Andrei Poblaguev
Absorptive Corrections to the Electromagnetic Form Factor in High-Energy Elastic Proton-Proton Scattering
6 pages, 4 figures
null
null
null
hep-ph
http://creativecommons.org/licenses/by/4.0/
Recently, it was noted that absorptive corrections to the electromagnetic form factor in high-energy proton-proton scattering are important for the theoretical interpretation of the $p^\uparrow{p}$ and $p^\uparrow{A}$ analyzing power $A_\text{N}(t)$ measurements with the Hydrogen Jet Target polarimeter (HJET) at RHIC...
[ { "created": "Thu, 13 Jun 2024 15:39:08 GMT", "version": "v1" } ]
2024-06-14
[ [ "Poblaguev", "Andrei", "" ] ]
Recently, it was noted that absorptive corrections to the electromagnetic form factor in high-energy proton-proton scattering are important for the theoretical interpretation of the $p^\uparrow{p}$ and $p^\uparrow{A}$ analyzing power $A_\text{N}(t)$ measurements with the Hydrogen Jet Target polarimeter (HJET) at RHIC. ...
hep-ph/9809425
H. Sazdjian
H. Sazdjian (U. of Orsay)
Pionium lifetime corrections
9 pages, Latex. Uses Dubna98.sty. Talk given at the Int. Workshop "Hadronic Atoms and Positronium in the Standard Model", Dubna, 26-31 May 1998. To appear in the Proceedings
Proceedings, Dubna (1998) 50-58
null
null
hep-ph
null
Pionium lifetime corrections are evaluated in the frameworks of constrained Bethe-Salpeter equation and chiral perturbation theory. Corrections of order $O(\alpha)$ are calculated with respect to the conventional lowest-order formula, in which the strong interaction amplitude has been calculated to two-loop order wit...
[ { "created": "Thu, 17 Sep 1998 07:42:23 GMT", "version": "v1" } ]
2011-02-09
[ [ "Sazdjian", "H.", "", "U. of Orsay" ] ]
Pionium lifetime corrections are evaluated in the frameworks of constrained Bethe-Salpeter equation and chiral perturbation theory. Corrections of order $O(\alpha)$ are calculated with respect to the conventional lowest-order formula, in which the strong interaction amplitude has been calculated to two-loop order with ...
1010.4525
Fritz W. Bopp
F. W. Bopp
Novel ideas about emergent vacua
8 pages, 4 figures, The interpretation of new experimental results is expanded to include the preliminary CDF boson
Acta Phys.Polon. B42:1917,2011
10.5506/APhysPolB.42.1917
Preprint SI-HEP-2010-17
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Arguments for special emergent vacua which generate fermion and weak boson masses are outlined. Limitations and consequences of the concept are discussed. If confirmed the Australian dipole would give strong support to such a picture. Preliminary support from recent DZero and CDF data is discussed and predictions for...
[ { "created": "Thu, 21 Oct 2010 17:07:15 GMT", "version": "v1" }, { "created": "Fri, 29 Apr 2011 16:53:35 GMT", "version": "v2" } ]
2011-09-16
[ [ "Bopp", "F. W.", "" ] ]
Arguments for special emergent vacua which generate fermion and weak boson masses are outlined. Limitations and consequences of the concept are discussed. If confirmed the Australian dipole would give strong support to such a picture. Preliminary support from recent DZero and CDF data is discussed and predictions for L...
1403.4736
Rui Santos
P.M. Ferreira, John F. Gunion, Howard E. Haber and Rui Santos
Probing wrong-sign Yukawa couplings at the LHC and a future linear collider
28 pages, 21 figures
Phys. Rev. D 89, 115003 (2014)
10.1103/PhysRevD.89.115003
SCIPP 14/02; UCD-2014-2
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We consider the two-Higgs-doublet model as a framework in which to evaluate the viability of scenarios in which the sign of the coupling of the observed Higgs boson to down-type fermions (in particular, $b$-quark pairs) is opposite to that of the Standard Model (SM), while at the same time all other tree-level coupli...
[ { "created": "Wed, 19 Mar 2014 08:51:51 GMT", "version": "v1" }, { "created": "Wed, 26 Mar 2014 22:05:37 GMT", "version": "v2" }, { "created": "Sat, 7 Jun 2014 14:00:13 GMT", "version": "v3" }, { "created": "Tue, 10 Jun 2014 10:12:54 GMT", "version": "v4" } ]
2014-06-11
[ [ "Ferreira", "P. M.", "" ], [ "Gunion", "John F.", "" ], [ "Haber", "Howard E.", "" ], [ "Santos", "Rui", "" ] ]
We consider the two-Higgs-doublet model as a framework in which to evaluate the viability of scenarios in which the sign of the coupling of the observed Higgs boson to down-type fermions (in particular, $b$-quark pairs) is opposite to that of the Standard Model (SM), while at the same time all other tree-level coupling...
hep-ph/9305267
null
Patricia Ball
The Semileptonic Decays $D\to \pi(\rho) e \nu$ and $B\to \pi (\rho) e \nu$ from QCD Sum Rules
23 pages, 12 figures included as uu-encoded file, needs REVTEX, TUM--T31--39/93
Phys.Rev.D48:3190-3203,1993
10.1103/PhysRevD.48.3190
null
hep-ph
null
We investigate the semileptonic decays of B and D mesons into $\pi$ and $\rho$ mesons, respectively, by means of QCD sum rules. We find that for the vector formfactors involved the pole dominance hypothesis is valid to good accuracy with pole masses in the expected range. Pole dominance, however, does not apply to th...
[ { "created": "Fri, 14 May 1993 07:28:19 GMT", "version": "v1" } ]
2010-11-01
[ [ "Ball", "Patricia", "" ] ]
We investigate the semileptonic decays of B and D mesons into $\pi$ and $\rho$ mesons, respectively, by means of QCD sum rules. We find that for the vector formfactors involved the pole dominance hypothesis is valid to good accuracy with pole masses in the expected range. Pole dominance, however, does not apply to the ...
hep-ph/0501189
Marek Karliner
Marek Karliner and Harry J. Lipkin
New tests for experiments producing pentaquarks
Following readers' comments, stressing applicability to both fixed target and collider exps, in both Theta^+ and Theta_c searches, especially with low stats; reflected also in title change
Phys.Lett. B616 (2005) 191-195
10.1016/j.physletb.2005.04.048
Cavendish-HEP-05/04, TAUP 2794-05, WIS/1/05-JAN-DPP, ANL-HEP-PR-05-5
hep-ph hep-ex nucl-ex
null
The distribution of the squared momentum difference |P_A|^2 - |P_B|^2 between the momenta in the laboratory system of two experimentally observed particles A and B provides a test for whether an observed mass peak indicates a real resonance rather than nonresonant background or kinematic reflection. The angular distr...
[ { "created": "Thu, 20 Jan 2005 13:36:41 GMT", "version": "v1" }, { "created": "Mon, 24 Jan 2005 19:58:56 GMT", "version": "v2" } ]
2010-04-05
[ [ "Karliner", "Marek", "" ], [ "Lipkin", "Harry J.", "" ] ]
The distribution of the squared momentum difference |P_A|^2 - |P_B|^2 between the momenta in the laboratory system of two experimentally observed particles A and B provides a test for whether an observed mass peak indicates a real resonance rather than nonresonant background or kinematic reflection. The angular distrib...
1703.02964
Georgios K. Karananas Dr.
Georgios K. Karananas, Mikhail Shaposhnikov
Gauge coupling unification without leptoquarks
Journal version---discussion extended, typos corrected, references added
Phys. Lett. B 771 (2017) 332-338
10.1016/j.physletb.2017.05.065
null
hep-ph hep-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We propose an interpretation of the gauge coupling unification scale which is not related to any new particle threshold. We revisit Grand Unified Theories and show that it is possible to completely eliminate the scalar as well as vector leptoquarks from the particle physics spectrum. As a consequence, in our approach...
[ { "created": "Wed, 8 Mar 2017 18:44:13 GMT", "version": "v1" }, { "created": "Fri, 2 Jun 2017 09:09:21 GMT", "version": "v2" } ]
2017-06-05
[ [ "Karananas", "Georgios K.", "" ], [ "Shaposhnikov", "Mikhail", "" ] ]
We propose an interpretation of the gauge coupling unification scale which is not related to any new particle threshold. We revisit Grand Unified Theories and show that it is possible to completely eliminate the scalar as well as vector leptoquarks from the particle physics spectrum. As a consequence, in our approach t...
0907.4319
Ralf Rapp
R. Rapp, F. Riek, H. van Hees, V. Greco, M. Mannarelli
Nonperturbative Heavy-Quark Interactions in the QGP
4 pages + 6 eps figures, proceedings contribution to Quark Matter 2009, Knoxville (TN), Mar 30 - Apr 04; v2: 3 figs. updated for b/w viewing
Nucl.Phys.A830:861c-864c,2009
10.1016/j.nuclphysa.2009.10.078
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We adopt a $T$-matrix approach to study quarkonium properties and heavy-quark transport in a Quark-Gluon Plasma. The $T$-matrix approach is well suited to implement potential scattering and thus provides a common framework for low-momentum transfer interactions in heavy-heavy and heavy-light quark systems. We assume ...
[ { "created": "Fri, 24 Jul 2009 15:21:14 GMT", "version": "v1" }, { "created": "Thu, 24 Sep 2009 16:19:12 GMT", "version": "v2" } ]
2009-11-18
[ [ "Rapp", "R.", "" ], [ "Riek", "F.", "" ], [ "van Hees", "H.", "" ], [ "Greco", "V.", "" ], [ "Mannarelli", "M.", "" ] ]
We adopt a $T$-matrix approach to study quarkonium properties and heavy-quark transport in a Quark-Gluon Plasma. The $T$-matrix approach is well suited to implement potential scattering and thus provides a common framework for low-momentum transfer interactions in heavy-heavy and heavy-light quark systems. We assume th...
hep-ph/9712473
Hai-Yang Cheng
Hai-Yang Cheng
Remarks on Next-to-Leading Order Analysis of Polarized Deep Inelastic Scattering Data
10 pages, 1 figure. A new reference is added and a new paragraph after Eq.(10) is presented. To be published in Phys. Lett. B
Phys.Lett. B427 (1998) 371-376
10.1016/S0370-2693(98)00366-9
null
hep-ph hep-ex
null
Since the x dependence of the axial-anomaly effect in inclusive polarized deep inelastic scattering is fixed, the transformation from the $\bar{MS}$ scheme to different factorization schemes are not arbitrary. If the quark spin distribution is demanded to be anomaly-free so that it does not evolve with $Q^2$ and hard...
[ { "created": "Sun, 21 Dec 1997 23:24:32 GMT", "version": "v1" }, { "created": "Thu, 25 Dec 1997 23:23:14 GMT", "version": "v2" }, { "created": "Fri, 27 Mar 1998 23:25:21 GMT", "version": "v3" } ]
2009-10-30
[ [ "Cheng", "Hai-Yang", "" ] ]
Since the x dependence of the axial-anomaly effect in inclusive polarized deep inelastic scattering is fixed, the transformation from the $\bar{MS}$ scheme to different factorization schemes are not arbitrary. If the quark spin distribution is demanded to be anomaly-free so that it does not evolve with $Q^2$ and hard g...
0904.2005
Sally Dawson
Sally Dawson and Wenbin Yan
Hiding the Higgs Boson with Multiple Scalars
13 pages
Phys.Rev.D79:095002,2009
10.1103/PhysRevD.79.095002
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We consider models with multiple Higgs scalar gauge singlets and the resulting restrictions on the parameters from precision electroweak measurements. In these models, the scalar singlets mix with the SU(2) Higgs doublet, potentially leading to reduced couplings of the scalars to fermions and gauge bosons relative to...
[ { "created": "Mon, 13 Apr 2009 20:07:08 GMT", "version": "v1" } ]
2009-10-29
[ [ "Dawson", "Sally", "" ], [ "Yan", "Wenbin", "" ] ]
We consider models with multiple Higgs scalar gauge singlets and the resulting restrictions on the parameters from precision electroweak measurements. In these models, the scalar singlets mix with the SU(2) Higgs doublet, potentially leading to reduced couplings of the scalars to fermions and gauge bosons relative to t...
1608.00087
Yuya Yamaguchi
Naoyuki Haba, Hiroyuki Ishida, Nobuchika Okada and Yuya Yamaguchi
Multiple-point principle with a scalar singlet extension of the Standard Model
17 pages, 6 figures, version accepted for publication in PTEP
Prog. Theor. Exp. Phys. (2017) 013B03
10.1093/ptep/ptw186
SU-HET-04-2016
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We suggest a scalar singlet extension of the standard model, in which the multiple-point principle (MPP) condition of a vanishing Higgs potential at the Planck scale is realized. Although there have been lots of attempts to realize the MPP at the Planck scale, the realization with keeping naturalness is quite difficu...
[ { "created": "Sat, 30 Jul 2016 07:59:50 GMT", "version": "v1" }, { "created": "Mon, 23 Jan 2017 06:57:46 GMT", "version": "v2" } ]
2017-01-24
[ [ "Haba", "Naoyuki", "" ], [ "Ishida", "Hiroyuki", "" ], [ "Okada", "Nobuchika", "" ], [ "Yamaguchi", "Yuya", "" ] ]
We suggest a scalar singlet extension of the standard model, in which the multiple-point principle (MPP) condition of a vanishing Higgs potential at the Planck scale is realized. Although there have been lots of attempts to realize the MPP at the Planck scale, the realization with keeping naturalness is quite difficult...
hep-ph/0504176
Sameer Ikhdair
Sameer M. Ikhdair
Theoretical Status of the $B_{c}$ Meson in the Shifted l-Expansion Technique
33 pages, 1 figure
null
null
null
hep-ph
null
In the framework of phenomenological static and QCD-motivated model potentials for heavy quarkonium, we compute the $\bar{b}c$ mass spectrum as well as its $\QTR{rm}{1S}$ hyperfine splitting using the recently introduced shifted $l$- expansion technique. We also predict the leptonic constant \ $f_{B_{c}}$ of the ligh...
[ { "created": "Wed, 20 Apr 2005 14:10:47 GMT", "version": "v1" }, { "created": "Thu, 21 Apr 2005 11:49:20 GMT", "version": "v2" } ]
2007-05-23
[ [ "Ikhdair", "Sameer M.", "" ] ]
In the framework of phenomenological static and QCD-motivated model potentials for heavy quarkonium, we compute the $\bar{b}c$ mass spectrum as well as its $\QTR{rm}{1S}$ hyperfine splitting using the recently introduced shifted $l$- expansion technique. We also predict the leptonic constant \ $f_{B_{c}}$ of the lighte...
1012.4922
Romuald Wit
K. Fialkowski and R. Wit
On the multiplicity distributions at LHC energies
12 pages, 6 figures
Acta Physica Polonica B42 (2011) 293
10.5506/APhysPolB.42.293
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The ALICE and CMS data on the multiplicity distributions are compared with the lower energy data and with the results from the 8.142 version of the PYTHIA MC event generator with two tunings. The ALICE data for moments are used to calculate the factorial cumulants. It is suggested that the data on moments or cumulant...
[ { "created": "Wed, 22 Dec 2010 10:06:17 GMT", "version": "v1" } ]
2011-02-22
[ [ "Fialkowski", "K.", "" ], [ "Wit", "R.", "" ] ]
The ALICE and CMS data on the multiplicity distributions are compared with the lower energy data and with the results from the 8.142 version of the PYTHIA MC event generator with two tunings. The ALICE data for moments are used to calculate the factorial cumulants. It is suggested that the data on moments or cumulants ...
hep-ph/9908457
Asakawa Eri
Eri Asakawa
Heavy Higgs Productions at $\gamma \gamma$ Colliders
5 pages, LaTeX file with 2 PS figures. Figures and tables changed. Talk given at World-Wide Study of Physics and Detectors for Future Linear Colliders (LCWS 99), Sitges, Barcelona, Spain, 28 Apr - 5 May 1999
null
null
OCHA-PP-140
hep-ph
null
Multi-Higgs doublet models include more than one neutral Higgs bosons, some of which have different properties under a CP transformation. We examine their productions at $\gamma \gamma$ colliders. It is found that helicity observations of final top-pairs can be powerful tools to distinguish their CP properties, espec...
[ { "created": "Wed, 25 Aug 1999 03:02:01 GMT", "version": "v1" }, { "created": "Wed, 22 Dec 1999 14:12:18 GMT", "version": "v2" } ]
2007-05-23
[ [ "Asakawa", "Eri", "" ] ]
Multi-Higgs doublet models include more than one neutral Higgs bosons, some of which have different properties under a CP transformation. We examine their productions at $\gamma \gamma$ colliders. It is found that helicity observations of final top-pairs can be powerful tools to distinguish their CP properties, especia...
hep-ph/9302270
Evan Reidell
E. P. Gilson and R. L. Jaffe
Very Small Strangelets
13 pages, MIT CTP#2173
Phys.Rev.Lett. 71 (1993) 332-335
10.1103/PhysRevLett.71.332
null
hep-ph
null
We study the stability of small strangelets by employing a simple model of strange matter as a gas of non-interacting fermions confined in a bag. We solve the Dirac equation and populate the energy levels of the bag one quark at a time. Our results show that for system parameters such that strange matter is unbound i...
[ { "created": "Wed, 17 Feb 1993 20:53:05 GMT", "version": "v1" } ]
2009-10-22
[ [ "Gilson", "E. P.", "" ], [ "Jaffe", "R. L.", "" ] ]
We study the stability of small strangelets by employing a simple model of strange matter as a gas of non-interacting fermions confined in a bag. We solve the Dirac equation and populate the energy levels of the bag one quark at a time. Our results show that for system parameters such that strange matter is unbound in ...
1202.2019
Simon Badger
Simon Badger, Hjalte Frellesvig, Yang Zhang
Hepta-Cuts of Two-Loop Scattering Amplitudes
37 pages, 6 figures. version 2 : minor updates, published version
null
10.1007/JHEP04(2012)055
null
hep-ph hep-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present a method for the computation of hepta-cuts of two loop scattering amplitudes. Four dimensional unitarity cuts are used to factorise the integrand onto the product of six tree-level amplitudes evaluated at complex momentum values. Using Gram matrix constraints we derive a general parameterisation of the int...
[ { "created": "Thu, 9 Feb 2012 15:33:46 GMT", "version": "v1" }, { "created": "Tue, 17 Apr 2012 15:24:14 GMT", "version": "v2" } ]
2012-04-18
[ [ "Badger", "Simon", "" ], [ "Frellesvig", "Hjalte", "" ], [ "Zhang", "Yang", "" ] ]
We present a method for the computation of hepta-cuts of two loop scattering amplitudes. Four dimensional unitarity cuts are used to factorise the integrand onto the product of six tree-level amplitudes evaluated at complex momentum values. Using Gram matrix constraints we derive a general parameterisation of the integ...
hep-ph/0504255
Szymanowski Lech dr
B. Pire and L. Szymanowski
QCD analysis of bar p N -> gamma* pi in the scaling limit
15 pages, 1 .eps figure, to be published in Phys. Lett. B. Equation 23 corrected in version 3
Phys.Lett.B622:83-92,2005
10.1016/j.physletb.2005.06.080
null
hep-ph
null
We study the scaling regime of nucleon - anti-nucleon annihilation into a deeply virtual photon and a meson, bar p N -> gamma* pi. We obtain the leading twist amplitude in the kinematical region where it factorizes into an antiproton distribution amplitude, a short-distance matrix element related to nucleon form fact...
[ { "created": "Wed, 27 Apr 2005 09:54:37 GMT", "version": "v1" }, { "created": "Tue, 28 Jun 2005 16:50:11 GMT", "version": "v2" }, { "created": "Thu, 8 Feb 2007 17:56:15 GMT", "version": "v3" } ]
2014-11-18
[ [ "Pire", "B.", "" ], [ "Szymanowski", "L.", "" ] ]
We study the scaling regime of nucleon - anti-nucleon annihilation into a deeply virtual photon and a meson, bar p N -> gamma* pi. We obtain the leading twist amplitude in the kinematical region where it factorizes into an antiproton distribution amplitude, a short-distance matrix element related to nucleon form factor...
hep-ph/0306138
Mirco Cannoni
D. A. Anipko, M. Cannoni, I. F. Ginzburg, O. Panella, A. V. Pak
Charge asymmetries in $\gamma\gamma \to \mu^+\mu^- + \nu_{\mu} \bar{\nu}_\mu$ / $\gamma \gamma \to W^\pm\mu^\mp +\nu_\mu$ with polarized photons
Talk presented by I. F. Ginzburg at Photon 2003: International Conference on the Structure and Interactions of the Photon and 15th International Workshop on Photon-Photon Collisions, Frascati, Italy, 7-11 Apr 2003
null
10.1016/S0920-5632(03)02357-0
null
hep-ph
null
It is shown that the difference in the distributions of positive ($\mu^+$) and negative charged leptons ($\mu^-$) in reactions $\gamma \gamma \to \mu^+\mu^-+\nu\bar\nu$ and $\gamma \gamma \to W^\pm\mu^\mp +\nu(\bar\nu)$ at $\sqrt{s}>200$ GeV leads to observable {\em charge asymmetry} of muons which is sensitive to Ne...
[ { "created": "Mon, 16 Jun 2003 17:19:11 GMT", "version": "v1" } ]
2009-11-10
[ [ "Anipko", "D. A.", "" ], [ "Cannoni", "M.", "" ], [ "Ginzburg", "I. F.", "" ], [ "Panella", "O.", "" ], [ "Pak", "A. V.", "" ] ]
It is shown that the difference in the distributions of positive ($\mu^+$) and negative charged leptons ($\mu^-$) in reactions $\gamma \gamma \to \mu^+\mu^-+\nu\bar\nu$ and $\gamma \gamma \to W^\pm\mu^\mp +\nu(\bar\nu)$ at $\sqrt{s}>200$ GeV leads to observable {\em charge asymmetry} of muons which is sensitive to New ...
hep-ph/0009204
Adrian Kent
Adrian Kent (DAMTP, University of Cambridge)
A critical look at risk assessments for global catastrophes
Minor corrections and note added July 2015. Previous arxiv version corresponds to 2004 journal published version
Risk Anal. 24 (2004) 157-168
null
DAMTP-2000-105
hep-ph hep-th physics.soc-ph quant-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Recent papers by Busza et al. (BJSW) and Dar et al. (DDH) argue that astrophysical data can be used to establish small bounds on the risk of a "killer strangelet" catastrophe scenario in the RHIC and ALICE collider experiments. DDH and other commentators (initially including BJSW) suggested that these empirical bound...
[ { "created": "Mon, 18 Sep 2000 16:07:30 GMT", "version": "v1" }, { "created": "Thu, 21 Sep 2000 11:05:26 GMT", "version": "v2" }, { "created": "Thu, 30 Aug 2001 14:07:58 GMT", "version": "v3" }, { "created": "Mon, 21 Oct 2002 05:41:19 GMT", "version": "v4" }, { "c...
2015-07-27
[ [ "Kent", "Adrian", "", "DAMTP, University of Cambridge" ] ]
Recent papers by Busza et al. (BJSW) and Dar et al. (DDH) argue that astrophysical data can be used to establish small bounds on the risk of a "killer strangelet" catastrophe scenario in the RHIC and ALICE collider experiments. DDH and other commentators (initially including BJSW) suggested that these empirical bounds ...
hep-ph/9905558
Jan Kalinowski
Jan Kalinowski
Determining SUSY Parameters from Chargino Pair Production
9 pages, 5 figures, uses JHEP.cls (included), talk given at the Corfu Summer Institute on Elementary Particle Physics, 1998
null
null
IFT/99-10
hep-ph
null
A procedure to determine the chargino mixing angles and, subsequently, the fundamental SUSY parameters M2, mu and tan(beta) by measurements of the total cross section and the spin correlations in e+e- annihilation to chi1^+ chi1^- chargino pairs is discussed.
[ { "created": "Mon, 31 May 1999 09:27:49 GMT", "version": "v1" } ]
2007-05-23
[ [ "Kalinowski", "Jan", "" ] ]
A procedure to determine the chargino mixing angles and, subsequently, the fundamental SUSY parameters M2, mu and tan(beta) by measurements of the total cross section and the spin correlations in e+e- annihilation to chi1^+ chi1^- chargino pairs is discussed.
0909.4444
Christopher Smith
Christopher Smith
Minimal flavor violation in supersymmetric theories
10 pages. Talk given at the Flavianet Topical Workshop "Low energy constraints on extensions of the Standard Model", July 23-27, Kazimierz, Poland
Acta Phys.Polon.Supp.3:53-64,2010
null
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The minimal flavor violation hypothesis is presented in the context of the MSSM. Its fundamental principles are introduced and motivated, and its phenomenological consequences for FCNC and CP-violating observables as well as for R-parity violating processes are briefly described.
[ { "created": "Thu, 24 Sep 2009 13:50:06 GMT", "version": "v1" } ]
2010-11-02
[ [ "Smith", "Christopher", "" ] ]
The minimal flavor violation hypothesis is presented in the context of the MSSM. Its fundamental principles are introduced and motivated, and its phenomenological consequences for FCNC and CP-violating observables as well as for R-parity violating processes are briefly described.
hep-ph/9812255
J. G. Contreras
J. G. Contreras (CINVESTAV-Merida)
The intercept of the BFKL pomeron from Forward Jets at HERA
10 pages, one figure, accepted for publication in PLB
Phys.Lett. B446 (1999) 158-162
10.1016/S0370-2693(98)01519-6
null
hep-ph
null
Recently the H1 and ZEUS collaborations have presented cross sections for DIS events with a forward jet. The BFKL formalism is able to produce an excellent fit to these data. The extracted intercept of the hard pomeron suggests that when all higher order corrections are taken into account the cross section will still...
[ { "created": "Fri, 4 Dec 1998 16:16:04 GMT", "version": "v1" } ]
2009-10-31
[ [ "Contreras", "J. G.", "", "CINVESTAV-Merida" ] ]
Recently the H1 and ZEUS collaborations have presented cross sections for DIS events with a forward jet. The BFKL formalism is able to produce an excellent fit to these data. The extracted intercept of the hard pomeron suggests that when all higher order corrections are taken into account the cross section will still r...
hep-ph/0310106
Mauro Napsuciale
M. Napsuciale and C. A. Vaquera-Araujo
Equations of motion as projectors and the gyromagnetic factor g_{s}=1/s} from first principles
14 pages, new material included, title changed accordingly
null
null
null
hep-ph
null
In this work we adopt the point of view that the equations of motion satisfied by a field are just a consequence of the representation space which the field belongs to, and the discrete symmetries we impose on it. We illustrate this view point by rederiving Dirac and Proca equations as projectors over the subspaces w...
[ { "created": "Thu, 9 Oct 2003 01:19:42 GMT", "version": "v1" }, { "created": "Thu, 15 Jul 2004 23:26:45 GMT", "version": "v2" } ]
2007-05-23
[ [ "Napsuciale", "M.", "" ], [ "Vaquera-Araujo", "C. A.", "" ] ]
In this work we adopt the point of view that the equations of motion satisfied by a field are just a consequence of the representation space which the field belongs to, and the discrete symmetries we impose on it. We illustrate this view point by rederiving Dirac and Proca equations as projectors over the subspaces wit...
2210.10819
Ting Cheng
Ting Cheng, Manfred Lindner, Manibrata Sen
Implications of a matter-antimatter mass asymmetry in Penning-trap experiments
6 pages, 2 figures, Matches with published version
Phys.Lett.B 844 (2023) 138068
10.1016/j.physletb.2023.138068
null
hep-ph hep-ex
http://creativecommons.org/licenses/by/4.0/
The Standard Model (SM) of particle physics, being a local, unitary and Lorentz-invariant quantum field theory, remains symmetric under the combined action of Charge, Parity, and Time Reversal (CPT) symmetry. This automatically implies that fundamental properties of particles and antiparticles should be equal in magn...
[ { "created": "Wed, 19 Oct 2022 18:11:03 GMT", "version": "v1" }, { "created": "Mon, 17 Jul 2023 19:45:16 GMT", "version": "v2" } ]
2023-07-19
[ [ "Cheng", "Ting", "" ], [ "Lindner", "Manfred", "" ], [ "Sen", "Manibrata", "" ] ]
The Standard Model (SM) of particle physics, being a local, unitary and Lorentz-invariant quantum field theory, remains symmetric under the combined action of Charge, Parity, and Time Reversal (CPT) symmetry. This automatically implies that fundamental properties of particles and antiparticles should be equal in magnit...
hep-ph/0111139
Tamas Csorgo
T. Csorgo
Simple solutions of fireball hydrodynamics for self-similar, ellipsoidal flows
4 pages, revtex4, 3 eps figures, discussion on other exact solutions added (final version)
ActaPhys.Polon.B37:483-494,2006
null
null
hep-ph astro-ph nucl-th physics.flu-dyn
null
A new family of simple, analytic solutions of self-similarly expanding fireballs is found for systems with ellipsoidal symmetry and a direction dependent, generalized Hubble flow. Gaussian, shell like or oscillating density profiles emerge for simple choices of an arbitrary scaling function. New, cylindrically or sph...
[ { "created": "Mon, 12 Nov 2001 15:24:11 GMT", "version": "v1" }, { "created": "Mon, 13 Feb 2006 01:14:12 GMT", "version": "v2" } ]
2008-11-26
[ [ "Csorgo", "T.", "" ] ]
A new family of simple, analytic solutions of self-similarly expanding fireballs is found for systems with ellipsoidal symmetry and a direction dependent, generalized Hubble flow. Gaussian, shell like or oscillating density profiles emerge for simple choices of an arbitrary scaling function. New, cylindrically or spher...
hep-ph/0510058
Mikhail Tokarev V
M.Tokarev (1), I.Zborovsky (2) ((1) Joint Institute for Nuclear Research, Dubna, Moscow region, Russia (2) Nuclear Physics Institute, Academy of Sciences of the Czech Republic, Rez, Czech Republic)
Verification of Z-scaling in pp Collisions at RHIC
6 pages, LaTeX, 12 figures, Presented at the XXXV International Symposium on Multiparticle Dynamics, Kromeriz, Czech Republic, August 9-15, 2005
AIP Conf.Proc.828:205-210,2006
10.1063/1.2197418
null
hep-ph
null
New experimental data on inclusive spectra of identified particles produced in pp collisions at the RHIC are used to test z-scaling. Energy and multiplicity independence of the scaling function is established. The RHIC data confirm z-scaling observed at U70, ISR, SpS and Tevatron energies. The obtained results are of...
[ { "created": "Wed, 5 Oct 2005 13:46:49 GMT", "version": "v1" } ]
2011-03-23
[ [ "Tokarev", "M.", "" ], [ "Zborovsky", "I.", "" ] ]
New experimental data on inclusive spectra of identified particles produced in pp collisions at the RHIC are used to test z-scaling. Energy and multiplicity independence of the scaling function is established. The RHIC data confirm z-scaling observed at U70, ISR, SpS and Tevatron energies. The obtained results are of i...
1802.07507
Ben King
B. King
Electron-seeded ALP production and ALP decay in an oscillating electromagnetic field
7 pages, 4 figures
null
10.1016/j.physletb.2018.06.016
null
hep-ph physics.optics physics.plasm-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Certain models involving ALPs (axion-like-particles) allow for the coupling of scalars and pseudoscalars to fermions. A derivation of the total rate for production of massive scalars and pseudoscalars by an electron in a monochromatic, circularly-polarised electromagnetic background is presented. In addition, a deriv...
[ { "created": "Wed, 21 Feb 2018 10:51:14 GMT", "version": "v1" } ]
2018-06-21
[ [ "King", "B.", "" ] ]
Certain models involving ALPs (axion-like-particles) allow for the coupling of scalars and pseudoscalars to fermions. A derivation of the total rate for production of massive scalars and pseudoscalars by an electron in a monochromatic, circularly-polarised electromagnetic background is presented. In addition, a derivat...
1810.04939
Xin-Qiang Li
Quan-Yi Hu, Xin-Qiang Li and Ya-Dong Yang
$b\to c\tau\nu$ Transitions in the Standard Model Effective Field Theory
43 pages, 3 figures and 5 tables; references updated and more discussions added, final version to be published in the journal
null
10.1140/epjc/s10052-019-6766-8
null
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The $R(D^{(\ast)})$ anomalies observed in $B\to D^{(\ast)}\tau\nu$ decays have attracted much attention in recent years. In this paper, we study the $B\to D^{(\ast)}\tau\nu$, $\Lambda_b\to\Lambda_c\tau\nu$, $B_c\to (J/\psi,\,\eta_c)\tau\nu$, $B\to X_c\tau\nu$, and $B_c\to\tau\nu$ decays, all being mediated by the sam...
[ { "created": "Thu, 11 Oct 2018 10:14:11 GMT", "version": "v1" }, { "created": "Tue, 19 Mar 2019 09:55:05 GMT", "version": "v2" } ]
2019-05-01
[ [ "Hu", "Quan-Yi", "" ], [ "Li", "Xin-Qiang", "" ], [ "Yang", "Ya-Dong", "" ] ]
The $R(D^{(\ast)})$ anomalies observed in $B\to D^{(\ast)}\tau\nu$ decays have attracted much attention in recent years. In this paper, we study the $B\to D^{(\ast)}\tau\nu$, $\Lambda_b\to\Lambda_c\tau\nu$, $B_c\to (J/\psi,\,\eta_c)\tau\nu$, $B\to X_c\tau\nu$, and $B_c\to\tau\nu$ decays, all being mediated by the same ...
hep-ph/0305311
Gerhard Ecker
V. Cirigliano, G. Ecker, H. Neufeld and A. Pich
Meson resonances, large N_c and chiral symmetry
14 pages
JHEP 0306 (2003) 012
10.1088/1126-6708/2003/06/012
IFIC/03-23, UWThPh-2003-8
hep-ph
null
We investigate the implications of large N_c and chiral symmetry for the mass spectra of meson resonances. Unlike for most other mesons, the mass matrix of the light scalars deviates strongly from its large-N_c limit. We discuss the possible assignments for the lightest scalar nonet that survives in the large-N_c lim...
[ { "created": "Wed, 28 May 2003 15:36:23 GMT", "version": "v1" } ]
2009-11-10
[ [ "Cirigliano", "V.", "" ], [ "Ecker", "G.", "" ], [ "Neufeld", "H.", "" ], [ "Pich", "A.", "" ] ]
We investigate the implications of large N_c and chiral symmetry for the mass spectra of meson resonances. Unlike for most other mesons, the mass matrix of the light scalars deviates strongly from its large-N_c limit. We discuss the possible assignments for the lightest scalar nonet that survives in the large-N_c limit...
hep-ph/0403043
Kazunori Kohri
Kazunori Kohri, Masahiro Yamaguchi and Jun'ichi Yokoyama
Production and dilution of gravitinos by modulus decay
18 pages, 4 figures, to appear in Phys. Rev. D
Phys.Rev. D70 (2004) 043522
10.1103/PhysRevD.70.043522
OU-TAP-227, TU-711
hep-ph astro-ph
null
We study the cosmological consequences of generic scalar fields like moduli which decay only through gravitationally suppressed interactions. We consider a new production mechanism of gravitinos from moduli decay, which might be more effective than previously known mechanisms, and calculate the final gravitino-to-ent...
[ { "created": "Thu, 4 Mar 2004 08:09:09 GMT", "version": "v1" }, { "created": "Thu, 22 Apr 2004 12:02:32 GMT", "version": "v2" } ]
2009-11-10
[ [ "Kohri", "Kazunori", "" ], [ "Yamaguchi", "Masahiro", "" ], [ "Yokoyama", "Jun'ichi", "" ] ]
We study the cosmological consequences of generic scalar fields like moduli which decay only through gravitationally suppressed interactions. We consider a new production mechanism of gravitinos from moduli decay, which might be more effective than previously known mechanisms, and calculate the final gravitino-to-entro...
1705.09787
Cai-Dian Lu
Cai-Dian Lu and Si-Hong Zhou
Charmless Two-Body B Meson Decays In Factorization Assisted Topological Amplitude Approach
4 pages, no figures. talk given at 52nd Rencontres de Moriond QCD and High Energy Interactions, La Thuile, March 25 - April 1, 2017
null
null
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We analyze charmless two-body non-leptonic $B$ decays under the framework of factorization assisted topological amplitude approach. Unlike the conventional flavor diagram approach, we consider flavor $SU(3)$ breaking effect assisted by factorization hypothesis for topological diagram amplitudes of different decay mod...
[ { "created": "Sat, 27 May 2017 08:53:21 GMT", "version": "v1" } ]
2017-05-30
[ [ "Lu", "Cai-Dian", "" ], [ "Zhou", "Si-Hong", "" ] ]
We analyze charmless two-body non-leptonic $B$ decays under the framework of factorization assisted topological amplitude approach. Unlike the conventional flavor diagram approach, we consider flavor $SU(3)$ breaking effect assisted by factorization hypothesis for topological diagram amplitudes of different decay modes...
1110.0302
Shi-Yuan Li
Shi-Yuan Li
OPERA Collaboration have observed phase speed of neutrino wave function, while advanced time displacement is mainly due to finite life time of pion
12 pages for 12pt
null
null
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
First we call the attention that velocity defined by ratio between some intervals of space and time respectively is sometimes ambiguous, in the framework of quantum theory. Velocity in general is not possible to be well defined as some generator of certain space-time symmetry operation. Then in section 3 by analyzing...
[ { "created": "Mon, 3 Oct 2011 08:54:51 GMT", "version": "v1" }, { "created": "Tue, 25 Oct 2011 08:45:04 GMT", "version": "v2" }, { "created": "Sun, 4 Dec 2011 06:24:08 GMT", "version": "v3" } ]
2011-12-06
[ [ "Li", "Shi-Yuan", "" ] ]
First we call the attention that velocity defined by ratio between some intervals of space and time respectively is sometimes ambiguous, in the framework of quantum theory. Velocity in general is not possible to be well defined as some generator of certain space-time symmetry operation. Then in section 3 by analyzing t...
1009.2680
Sven Heinemeyer
S. Heinemeyer, V.A. Khoze, M.G. Ryskin, M. Tasevsky, G. Weiglein
BSM Higgs Physics at the LHC in the Forward Proton Mode
4 pages, 1 figure, talk given by S.H. at the "Physics at the LHC 2010", May 2010, DESY Hamburg, Germany
null
null
DCPT/10/152, DESY 10-152, IPPP/10/76
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We review the prospects for Central Exclusive Diffractive (CED) production of Higgs bosons in the SM with a fourth generation of fermions at the LHC using forward proton detectors installed at 220m and 420m distance around ATLAS and / or CMS. We discuss the determination of Higgs spin-parity and coupling structures a...
[ { "created": "Tue, 14 Sep 2010 14:27:43 GMT", "version": "v1" } ]
2010-09-15
[ [ "Heinemeyer", "S.", "" ], [ "Khoze", "V. A.", "" ], [ "Ryskin", "M. G.", "" ], [ "Tasevsky", "M.", "" ], [ "Weiglein", "G.", "" ] ]
We review the prospects for Central Exclusive Diffractive (CED) production of Higgs bosons in the SM with a fourth generation of fermions at the LHC using forward proton detectors installed at 220m and 420m distance around ATLAS and / or CMS. We discuss the determination of Higgs spin-parity and coupling structures at ...
2208.12254
Andreas Crivellin
Andreas Crivellin, Claudio Andrea Manzari, Bruce Mellado, Salah-Eddine Dahbi
Consistency and Interpretation of the LHC (Di-)Di-Jet Excesses
9 pages, 4 figures, version accepted for publication in PRD
null
10.1103/PhysRevD.107.054045
PSI-PR-22-27, ZU-TH 42/22
hep-ph hep-ex
http://creativecommons.org/licenses/by/4.0/
ATLAS observed a limit for {the cross section of di-jets resonances, which is weaker than expected for a} mass slightly below $\approx$1\TeV. In addition, CMS reported hints for the (non-resonant) pair production of di-jet resonances $X$ via a particle $Y$ at a very similar mass range with a local (global) significan...
[ { "created": "Thu, 25 Aug 2022 17:57:36 GMT", "version": "v1" }, { "created": "Mon, 29 Aug 2022 21:59:47 GMT", "version": "v2" }, { "created": "Fri, 24 Mar 2023 15:30:49 GMT", "version": "v3" } ]
2023-04-12
[ [ "Crivellin", "Andreas", "" ], [ "Manzari", "Claudio Andrea", "" ], [ "Mellado", "Bruce", "" ], [ "Dahbi", "Salah-Eddine", "" ] ]
ATLAS observed a limit for {the cross section of di-jets resonances, which is weaker than expected for a} mass slightly below $\approx$1\TeV. In addition, CMS reported hints for the (non-resonant) pair production of di-jet resonances $X$ via a particle $Y$ at a very similar mass range with a local (global) significance...
hep-ph/0202238
Yuri V. Kovchegov
Yuri V. Kovchegov (University of Washington)
High Energy QCD and the Large Nc Limit
20 pages, 8 figures, to be published in the proceedings of "The Phenomenology of Large Nc QCD" workshop, 9-11 January 2002, Arizona State University, Tempe, AZ
null
10.1142/9789812776914_0007
NT@UW-02-003
hep-ph
null
We review recent progress in understanding QCD at high energies and the role played in it by the large Nc limit. We discuss unitarization of total hadronic cross sections and saturation of structure functions at high energies.
[ { "created": "Mon, 25 Feb 2002 21:52:44 GMT", "version": "v1" } ]
2017-08-23
[ [ "Kovchegov", "Yuri V.", "", "University of Washington" ] ]
We review recent progress in understanding QCD at high energies and the role played in it by the large Nc limit. We discuss unitarization of total hadronic cross sections and saturation of structure functions at high energies.
hep-ph/0412405
Osamu Yasuda
Osamu Yasuda
Degeneracy and strategies of long baseline and reactor experiments
3 pages, 3 sets of figures, uses espcrc2.sty. Talk given at 6th International Workshop on Neutrino Factories and Superbeams (NuFact 04), Osaka, Japan, 26 Jul - 1 Aug 2004
null
10.1016/j.nuclphysbps.2005.05.049
null
hep-ph
null
Assuming that the JPARC experiment measures the oscillation probabilities $P(\nu_\mu\to\nu_e)$ and $P(\bar{\nu}_\mu\to\bar{\nu}_e)$ at $|\Delta m^2_{31}|L/4E=\pi/2$, I discuss what kind of extra experiment (long baseline or reactor) can contribute to determination of $\theta_{13}$ and the CP phase $\delta$.
[ { "created": "Wed, 29 Dec 2004 09:35:16 GMT", "version": "v1" } ]
2009-11-10
[ [ "Yasuda", "Osamu", "" ] ]
Assuming that the JPARC experiment measures the oscillation probabilities $P(\nu_\mu\to\nu_e)$ and $P(\bar{\nu}_\mu\to\bar{\nu}_e)$ at $|\Delta m^2_{31}|L/4E=\pi/2$, I discuss what kind of extra experiment (long baseline or reactor) can contribute to determination of $\theta_{13}$ and the CP phase $\delta$.
hep-ph/0404222
Stephen Wong
S.M.H. Wong
Out-of-Equilibrium Collinear Enhanced Equilibration in the Bottom-Up Thermalization Scenario in Heavy Ion Collisions
7 embedded EPS figures
null
null
null
hep-ph
null
Experimental measurement of the elliptic flow parameter $v_2$ and hydrodynamic model together showed that thermalization in the central region at the Relativistic Heavy Ion Collider to be perplexingly fast. This is a mystery in itself since none of the numerical perturbative QCD models are able to achieve such a feat...
[ { "created": "Sun, 25 Apr 2004 18:54:24 GMT", "version": "v1" }, { "created": "Wed, 28 Apr 2004 07:41:25 GMT", "version": "v2" } ]
2007-05-23
[ [ "Wong", "S. M. H.", "" ] ]
Experimental measurement of the elliptic flow parameter $v_2$ and hydrodynamic model together showed that thermalization in the central region at the Relativistic Heavy Ion Collider to be perplexingly fast. This is a mystery in itself since none of the numerical perturbative QCD models are able to achieve such a feat. ...
1006.0387
Ioannis Bouras
I. Bouras, E. Molnar, H. Niemi, Z. Xu, A. El, O. Fochler, C. Greiner, D.H. Rischke
Investigation of shock waves in the relativistic Riemann problem: A comparison of viscous fluid dynamics to kinetic theory
Version as published in PRC 82, 024910 (2010); 16 pages, 16 figures, typos corrected
Phys.Rev.C82:024910,2010
10.1103/PhysRevC.82.024910
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We solve the relativistic Riemann problem in viscous matter using the relativistic Boltzmann equation and the relativistic causal dissipative fluid-dynamical approach of Israel and Stewart. Comparisons between these two approaches clarify and point out the regime of validity of second-order fluid dynamics in relativi...
[ { "created": "Wed, 2 Jun 2010 14:18:59 GMT", "version": "v1" }, { "created": "Mon, 7 Jun 2010 17:04:34 GMT", "version": "v2" }, { "created": "Tue, 31 Aug 2010 22:17:51 GMT", "version": "v3" } ]
2014-11-21
[ [ "Bouras", "I.", "" ], [ "Molnar", "E.", "" ], [ "Niemi", "H.", "" ], [ "Xu", "Z.", "" ], [ "El", "A.", "" ], [ "Fochler", "O.", "" ], [ "Greiner", "C.", "" ], [ "Rischke", "D. H.", "" ] ]
We solve the relativistic Riemann problem in viscous matter using the relativistic Boltzmann equation and the relativistic causal dissipative fluid-dynamical approach of Israel and Stewart. Comparisons between these two approaches clarify and point out the regime of validity of second-order fluid dynamics in relativist...
hep-ph/9804254
Robert Fleischer
Amol Dighe (ICTP), Isard Dunietz (Fermilab), Robert Fleischer (CERN)
Resolving a Discrete Ambiguity in the CKM Angle $\beta$ through $B_{u,d} \to J/\psi K^\ast$ and $B_s \to J/\psi \phi$ Decays
5 pages, LaTeX, no figures
Phys.Lett. B433 (1998) 147-149
10.1016/S0370-2693(98)00680-7
CERN-TH/98-123, FERMILAB-PUB-98/101-T, IC/98/34
hep-ph
null
It is well known that $\sin(2\beta)$, where $\beta$ is one of the angles of the unitarity triangle of the CKM matrix, can be determined in a theoretically clean way by measuring mixing-induced CP violation in the decay $B_d \to J/\psi K_S$. Another clean extraction of this CKM angle is provided by the time-dependent ...
[ { "created": "Wed, 8 Apr 1998 07:49:15 GMT", "version": "v1" } ]
2009-10-31
[ [ "Dighe", "Amol", "", "ICTP" ], [ "Dunietz", "Isard", "", "Fermilab" ], [ "Fleischer", "Robert", "", "CERN" ] ]
It is well known that $\sin(2\beta)$, where $\beta$ is one of the angles of the unitarity triangle of the CKM matrix, can be determined in a theoretically clean way by measuring mixing-induced CP violation in the decay $B_d \to J/\psi K_S$. Another clean extraction of this CKM angle is provided by the time-dependent an...
1502.06508
Rome Samanta
Rome Samanta, Mainak Chakraborty, Ambar Ghosal
Evaluation of the Majorana Phases of a General Majorana Neutrino Mass Matrix: Testability of hierarchical Flavour Models
27 pages, 16 figures, 4 tables, to appear in NPB
null
10.1016/j.nuclphysb.2016.01.001
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We evaluate the Majorana phases for a general $3\times3$ complex symmetric neutrino mass matrix on the basis of Mohapatra-Rodejohann's phase convention using the three rephasing invariant quantities $I_{12}$, $I_{13}$ and $I_{23}$ proposed by Sarkar and Singh. We find them interesting as they allow us to evaluate eac...
[ { "created": "Mon, 23 Feb 2015 17:03:49 GMT", "version": "v1" }, { "created": "Sat, 2 Jan 2016 15:25:09 GMT", "version": "v2" } ]
2016-02-17
[ [ "Samanta", "Rome", "" ], [ "Chakraborty", "Mainak", "" ], [ "Ghosal", "Ambar", "" ] ]
We evaluate the Majorana phases for a general $3\times3$ complex symmetric neutrino mass matrix on the basis of Mohapatra-Rodejohann's phase convention using the three rephasing invariant quantities $I_{12}$, $I_{13}$ and $I_{23}$ proposed by Sarkar and Singh. We find them interesting as they allow us to evaluate each ...
1907.00011
Harikrishnan Ramani
Maxim Pospelov, Surjeet Rajendran, Harikrishnan Ramani
Metastable Nuclear Isomers as Dark Matter Accelerators
13 pages, 6 figures
Phys. Rev. D 101, 055001 (2020)
10.1103/PhysRevD.101.055001
null
hep-ph astro-ph.CO hep-ex nucl-ex nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Inelastic dark matter and strongly interacting dark matter are poorly constrained by direct detection experiments since they both require the scattering event to deliver energy from the nucleus into the dark matter in order to have observable effects. We propose to test these scenarios by searching for the collisiona...
[ { "created": "Fri, 28 Jun 2019 18:00:04 GMT", "version": "v1" }, { "created": "Fri, 10 Jul 2020 18:24:23 GMT", "version": "v2" } ]
2020-07-14
[ [ "Pospelov", "Maxim", "" ], [ "Rajendran", "Surjeet", "" ], [ "Ramani", "Harikrishnan", "" ] ]
Inelastic dark matter and strongly interacting dark matter are poorly constrained by direct detection experiments since they both require the scattering event to deliver energy from the nucleus into the dark matter in order to have observable effects. We propose to test these scenarios by searching for the collisional ...
hep-ph/0203196
Rishikesh Vaidya
Rishikesh Vaidya
Constraining R Violation from Anomalous Abelian Family Symmetry
7 pages, talk given at 7th Workshop on High Energy Particle Phenomenology, HRI, Allahabad, India and XIV DAE Symposium, Hyderabad, India few references added
null
null
null
hep-ph
null
The patterns of R violation resulting from imposition of a gauged U(1) horizontal symmetry, on the minimal supersymmetric standard model are systematically analyzed. We concentrate on a class of models with integer U(1) charges chosen to reproduce the quark masses and mixings as well as charged lepton masses exactly ...
[ { "created": "Wed, 20 Mar 2002 12:57:15 GMT", "version": "v1" }, { "created": "Tue, 9 Jul 2002 18:47:55 GMT", "version": "v2" } ]
2007-05-23
[ [ "Vaidya", "Rishikesh", "" ] ]
The patterns of R violation resulting from imposition of a gauged U(1) horizontal symmetry, on the minimal supersymmetric standard model are systematically analyzed. We concentrate on a class of models with integer U(1) charges chosen to reproduce the quark masses and mixings as well as charged lepton masses exactly or...
1903.04975
Nelly Sagidova
S.Belostotski, N.Sagidova, A.Vorobyev
Proton radius reconstruction from simulated electron-proton elastic scattering cross sections at low transfer momenta
null
null
null
null
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
This note is motivated by preparations of a new $ep$ elastic scattering experiment in the low transfer momentum region to be carried out in the 720 MeV electron beam of the Mainz Microtron MAMI. This experiment will use an innovative method allowing for detection of recoil protons in coincidence with the scattered el...
[ { "created": "Tue, 12 Mar 2019 15:05:30 GMT", "version": "v1" }, { "created": "Thu, 14 Mar 2019 13:06:22 GMT", "version": "v2" }, { "created": "Mon, 18 Mar 2019 21:39:59 GMT", "version": "v3" } ]
2019-03-20
[ [ "Belostotski", "S.", "" ], [ "Sagidova", "N.", "" ], [ "Vorobyev", "A.", "" ] ]
This note is motivated by preparations of a new $ep$ elastic scattering experiment in the low transfer momentum region to be carried out in the 720 MeV electron beam of the Mainz Microtron MAMI. This experiment will use an innovative method allowing for detection of recoil protons in coincidence with the scattered elec...
2009.01809
Gael Alguero
Ga\"el Alguero, Sabine Kraml, Wolfgang Waltenberger
A SModelS interface for pyhf likelihoods
11 pages, 3 figures
Comput. Phys. Comm. 264, July 2021, 107909
10.1016/j.cpc.2021.107909
null
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
SModelS is an automatized tool enabling the fast interpretation of simplified model results from the LHC within any model of new physics respecting a $\mathbb{Z}_2$ symmetry. We here present a new version of SModelS that can use the full likelihoods now provided by ATLAS in the form of pyhf JSON files. This much impr...
[ { "created": "Thu, 3 Sep 2020 17:15:26 GMT", "version": "v1" } ]
2021-03-17
[ [ "Alguero", "Gaël", "" ], [ "Kraml", "Sabine", "" ], [ "Waltenberger", "Wolfgang", "" ] ]
SModelS is an automatized tool enabling the fast interpretation of simplified model results from the LHC within any model of new physics respecting a $\mathbb{Z}_2$ symmetry. We here present a new version of SModelS that can use the full likelihoods now provided by ATLAS in the form of pyhf JSON files. This much improv...
1204.1016
Pietro Slavich
G. Degrassi, S. Di Vita, P. Slavich
On the NLO QCD corrections to the production of the heaviest neutral Higgs scalar in the MSSM
18 pages, 4 figures
Eur.Phys.J. C72 (2012) 2032
10.1140/epjc/s10052-012-2032-z
RM3-TH/12-5
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We present a calculation of the two-loop top-stop-gluino contributions to Higgs production via gluon fusion in the MSSM. By means of an asymptotic expansion in the heavy particle masses, we obtain explicit and compact analytic formulae that are valid when the Higgs and the top quark are lighter than stops and gluino,...
[ { "created": "Wed, 4 Apr 2012 17:57:18 GMT", "version": "v1" } ]
2012-06-08
[ [ "Degrassi", "G.", "" ], [ "Di Vita", "S.", "" ], [ "Slavich", "P.", "" ] ]
We present a calculation of the two-loop top-stop-gluino contributions to Higgs production via gluon fusion in the MSSM. By means of an asymptotic expansion in the heavy particle masses, we obtain explicit and compact analytic formulae that are valid when the Higgs and the top quark are lighter than stops and gluino, w...
hep-ph/0009033
Mikolaj Misiak
Mikolaj Misiak
Status of theoretical B -> X_s gamma and B -> X_s l^+ l^- analyses
Talk at the 30th International Conference on High Energy Physics, Osaka, July 27 - August 2, 2000. Two pages, no figures
null
null
null
hep-ph
null
Status of the theoretical B -> X_s gamma and B -> X_s l^+ l^- analyses is reviewed. Recently completed perturbative calculations are mentioned. The level at which non-perturbative effects are controlled is discussed.
[ { "created": "Mon, 4 Sep 2000 13:38:06 GMT", "version": "v1" } ]
2007-05-23
[ [ "Misiak", "Mikolaj", "" ] ]
Status of the theoretical B -> X_s gamma and B -> X_s l^+ l^- analyses is reviewed. Recently completed perturbative calculations are mentioned. The level at which non-perturbative effects are controlled is discussed.
2011.03529
Thomas Rueter
Thomas D. Rueter, Thomas G. Rizzo
Building Kinetic Mixing From Scalar Portal Matter
32 pages, 16 figures
null
null
SLAC-PUB-17566
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The nature of dark matter (DM) and how it might interact with the particles of the Standard Model (SM) is an ever-growing mystery. It is possible that the existence of new `dark sector' forces, yet undiscovered, are the key to solving this fundamental problem. In this paper, we construct a model in which a dark photo...
[ { "created": "Fri, 6 Nov 2020 18:57:05 GMT", "version": "v1" }, { "created": "Wed, 18 Nov 2020 19:23:41 GMT", "version": "v2" } ]
2020-11-20
[ [ "Rueter", "Thomas D.", "" ], [ "Rizzo", "Thomas G.", "" ] ]
The nature of dark matter (DM) and how it might interact with the particles of the Standard Model (SM) is an ever-growing mystery. It is possible that the existence of new `dark sector' forces, yet undiscovered, are the key to solving this fundamental problem. In this paper, we construct a model in which a dark photon ...
0809.1209
Mihoko Nojiri
Mihoko M. Nojiri
The Night before the LHC
5 pages, 5 figures, a plenary talk in SUSY08
AIP Conf.Proc.1078:79-83,2009
10.1063/1.3052055
KEK TH-1273, IPMU 08-0051
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
I review recent developments on the use of mT2 variables for SUSY parameter study, which might be useful for the data analysis in the early stage of the LHC experiments. I also review some of recent interesting studies. Talk in SUSY08.
[ { "created": "Sun, 7 Sep 2008 06:12:58 GMT", "version": "v1" } ]
2009-04-06
[ [ "Nojiri", "Mihoko M.", "" ] ]
I review recent developments on the use of mT2 variables for SUSY parameter study, which might be useful for the data analysis in the early stage of the LHC experiments. I also review some of recent interesting studies. Talk in SUSY08.
hep-ph/9808470
Lawrence M. Krauss
Sheldon L. Glashow (1), Peter J. Kernan (2) and Lawrence M. Krauss (2) ((1) Harvard University, (2) Case Western Reserve University)
"Just So" Neutrino Oscillations Are Back
4 pages, revtex, 4 ps figs: new refs added, and Super-K energy resolution function incorporated
Phys.Lett. B445 (1999) 412-418
10.1016/S0370-2693(98)01449-X
CWRU-P27-98
hep-ph astro-ph
null
Recent evidence for oscillations of atmospheric neutrinos at Super-Kamiokande suggest, in the simplest see-saw interpretation, neutrino masses such that `just so' vacuum oscillations can explain the solar neutrino deficit. Super-K solar neutrino data provide preliminary support for this interpretation. We describe ho...
[ { "created": "Fri, 28 Aug 1998 21:40:37 GMT", "version": "v1" }, { "created": "Fri, 4 Sep 1998 22:34:00 GMT", "version": "v2" } ]
2009-10-31
[ [ "Glashow", "Sheldon L.", "", "Harvard University" ], [ "Kernan", "Peter J.", "", "Case Western Reserve University" ], [ "Krauss", "Lawrence M.", "", "Case Western Reserve University" ] ]
Recent evidence for oscillations of atmospheric neutrinos at Super-Kamiokande suggest, in the simplest see-saw interpretation, neutrino masses such that `just so' vacuum oscillations can explain the solar neutrino deficit. Super-K solar neutrino data provide preliminary support for this interpretation. We describe how ...
1205.4756
Skokov Vladimir
V. Skokov, B. Friman, and K. Redlich
Volume fluctuations and higher order cumulants of the net baryon number
5 pages, 3 figures; version published in 2013
Phys. Rev. C 88, 034911 (2013)
10.1103/PhysRevC.88.034911
BNL-98044-2012-JA
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We consider the effect of volume fluctuations on cumulants of the net baryon number. Based on a general formalism, we derive universal expressions for the net baryon number cumulants in the presence of volume fluctuations with an arbitrary probability distribution. The relevance of these fluctuations for the baryon-n...
[ { "created": "Mon, 21 May 2012 21:31:50 GMT", "version": "v1" }, { "created": "Wed, 2 Mar 2016 14:15:53 GMT", "version": "v2" } ]
2016-03-03
[ [ "Skokov", "V.", "" ], [ "Friman", "B.", "" ], [ "Redlich", "K.", "" ] ]
We consider the effect of volume fluctuations on cumulants of the net baryon number. Based on a general formalism, we derive universal expressions for the net baryon number cumulants in the presence of volume fluctuations with an arbitrary probability distribution. The relevance of these fluctuations for the baryon-num...
1908.08803
Wolfgang Lucha
Wolfgang Lucha, Dmitri Melikhov, Hagop Sazdjian
Tetraquark-Adequate QCD Sum Rules
6 pages, 6 figures, contributed to the "European Physical Society Conference on High Energy Physics - EPS-HEP 2019" (10 - 17 July 2019, Ghent, Belgium)
null
null
HEPHY-PUB 1017/19 (2019)
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
With the experimental observation of several credible candidates for multiquark hadrons, the latter states re-entered the focus of interest of theoretical strong-interaction physics. Proper treatment of hadronic bound states by quantum chromodynamics, QCD, the quantum field theory governing all strong interactions, n...
[ { "created": "Fri, 23 Aug 2019 13:01:56 GMT", "version": "v1" } ]
2019-08-26
[ [ "Lucha", "Wolfgang", "" ], [ "Melikhov", "Dmitri", "" ], [ "Sazdjian", "Hagop", "" ] ]
With the experimental observation of several credible candidates for multiquark hadrons, the latter states re-entered the focus of interest of theoretical strong-interaction physics. Proper treatment of hadronic bound states by quantum chromodynamics, QCD, the quantum field theory governing all strong interactions, nec...
1811.09957
Kim Siyeon
C. H. Jang, B. J. Kim, Y. J. Ko, and K. Siyeon
Neutrinoless Double Beta Decay and Light Sterile Neutrino
5 figures
null
10.3938/jkps.73.1625
null
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Recent neutrino experiment results show a preference for the normal neutrino mass ordering. The global efforts to search for neutrinoless double beta decays undergo a broad gap with the approach to the prediction in the three-neutrino framework based on the normal ordering. This research is intended to show that it i...
[ { "created": "Sun, 25 Nov 2018 06:23:06 GMT", "version": "v1" } ]
2019-01-30
[ [ "Jang", "C. H.", "" ], [ "Kim", "B. J.", "" ], [ "Ko", "Y. J.", "" ], [ "Siyeon", "K.", "" ] ]
Recent neutrino experiment results show a preference for the normal neutrino mass ordering. The global efforts to search for neutrinoless double beta decays undergo a broad gap with the approach to the prediction in the three-neutrino framework based on the normal ordering. This research is intended to show that it is ...
0912.3440
Bastian Kubis
Bastian Kubis
Cusp effects in meson decays
12 pages, 14 figures; plenary talk at the 19th International IUPAP Conference on Few-Body Problems in Physics, Bonn, Germany, August 31 - September 5, 2009
EPJ Web Conf.3:01008,2010
10.1051/epjconf/20100301008
null
hep-ph hep-ex nucl-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The pion mass difference generates a pronounced cusp in the pi0 pi0 invariant mass distribution of K+ --> pi0 pi0 pi+ decays. As originally pointed out by Cabibbo, an accurate measurement of the cusp may allow one to pin down the S-wave pion-pion scattering lengths to high precision. We present the non-relativistic e...
[ { "created": "Thu, 17 Dec 2009 16:03:01 GMT", "version": "v1" } ]
2014-11-20
[ [ "Kubis", "Bastian", "" ] ]
The pion mass difference generates a pronounced cusp in the pi0 pi0 invariant mass distribution of K+ --> pi0 pi0 pi+ decays. As originally pointed out by Cabibbo, an accurate measurement of the cusp may allow one to pin down the S-wave pion-pion scattering lengths to high precision. We present the non-relativistic eff...
hep-ph/0004073
Francesco Vissani
Francesco Vissani (Gran Sasso)
Charm Production by Cosmic Muons
9 pages, 1 figure
Astropart.Phys.15:217,2001
10.1016/S0927-6505(00)00146-8
null
hep-ph
null
Narrow muon bundles in underground detectors permit to study muoproduction reactions that take place in the surrounding rock. We analyze the relevance of a QED+QCD reaction, muoproduction of "open charm". The contribution to double muon events is estimated to be 4-8 % of the one due to QED "trident" process, for an i...
[ { "created": "Fri, 7 Apr 2000 16:15:55 GMT", "version": "v1" }, { "created": "Sat, 8 Apr 2000 07:13:29 GMT", "version": "v2" }, { "created": "Wed, 28 Feb 2001 16:25:06 GMT", "version": "v3" } ]
2011-05-23
[ [ "Vissani", "Francesco", "", "Gran Sasso" ] ]
Narrow muon bundles in underground detectors permit to study muoproduction reactions that take place in the surrounding rock. We analyze the relevance of a QED+QCD reaction, muoproduction of "open charm". The contribution to double muon events is estimated to be 4-8 % of the one due to QED "trident" process, for an ide...
hep-ph/9411248
Per Osland
Bjarte Kileng and Per Osland
Light-Gluino Production at LEP
8 pages, LaTex 2.09, 4 figures, uuencoded ps files Full ps file available via anonymous ftp at ftp://vsfys1.fi.uib.no/anonymous/kileng/NORDITA_9460.ps (Figures now tar-compressed according to party line.)
null
null
NORDITA - 94/60 P
hep-ph
null
If gluinos are light, they will be produced in electron-positron annihilation at LEP, not only by radiation in pairs off quarks and antiquarks, but also without accompanying quark and antiquark jets. We here discuss the latter process, pair production of gluinos, in a model with soft supersymmetry breaking, allowing ...
[ { "created": "Tue, 8 Nov 1994 15:32:17 GMT", "version": "v1" }, { "created": "Thu, 10 Nov 1994 07:21:36 GMT", "version": "v2" } ]
2008-02-03
[ [ "Kileng", "Bjarte", "" ], [ "Osland", "Per", "" ] ]
If gluinos are light, they will be produced in electron-positron annihilation at LEP, not only by radiation in pairs off quarks and antiquarks, but also without accompanying quark and antiquark jets. We here discuss the latter process, pair production of gluinos, in a model with soft supersymmetry breaking, allowing fo...
2209.06578
Wolfgang Sch\"afer
Anna Cisek, Wolfgang Sch\"afer, Antoni Szczurek
Exclusive production of $\rho$ meson in gamma-proton collisions: $d \sigma/dt$ and the role of helicity flip processes
18 pages, 8 figures
null
10.1016/j.physletb.2022.137595
null
hep-ph
http://creativecommons.org/licenses/by/4.0/
We calculate the differential cross section $d\sigma/dt$ for the diffractive photoproduction process $\gamma p \to \rho p$ and compare to recent data extracted by the CMS collaboration from ultraperipheral proton-lead collisions. Our model is based on two-gluon exchange in the nonperturbative domain. We take into acc...
[ { "created": "Wed, 14 Sep 2022 12:00:42 GMT", "version": "v1" } ]
2022-11-30
[ [ "Cisek", "Anna", "" ], [ "Schäfer", "Wolfgang", "" ], [ "Szczurek", "Antoni", "" ] ]
We calculate the differential cross section $d\sigma/dt$ for the diffractive photoproduction process $\gamma p \to \rho p$ and compare to recent data extracted by the CMS collaboration from ultraperipheral proton-lead collisions. Our model is based on two-gluon exchange in the nonperturbative domain. We take into accou...
hep-ph/9912361
Xiaofeng Guo
Xiaofeng Guo, Jianwei Qiu, and Xiaofei Zhang
Nuclear dependence coefficient $\alpha(A,q_T)$ for the Drell-Yan and J/$\psi$ production
latex, 28 pages, 10 figures, updated two figures, and add more discussions
Phys.Rev. D62 (2000) 054008
10.1103/PhysRevD.62.054008
UK/TP 99-19
hep-ph nucl-th
null
Define the nuclear dependence coefficient $\alpha(A,q_T)$ in terms of ratio of transverse momentum spectrum in hadron-nucleus and in hadron-nucleon collisions: $\frac{d\sigma^{hA}}{dq_T^2}/ \frac{d\sigma^{hN}}{dq_T^2}\equiv A^{\alpha(A,q_T)}$. We argue that in small $q_T$ region, the $\alpha(A,q_T)$ for the Drell-Yan...
[ { "created": "Wed, 15 Dec 1999 17:36:32 GMT", "version": "v1" }, { "created": "Tue, 11 Apr 2000 18:40:14 GMT", "version": "v2" } ]
2009-10-31
[ [ "Guo", "Xiaofeng", "" ], [ "Qiu", "Jianwei", "" ], [ "Zhang", "Xiaofei", "" ] ]
Define the nuclear dependence coefficient $\alpha(A,q_T)$ in terms of ratio of transverse momentum spectrum in hadron-nucleus and in hadron-nucleon collisions: $\frac{d\sigma^{hA}}{dq_T^2}/ \frac{d\sigma^{hN}}{dq_T^2}\equiv A^{\alpha(A,q_T)}$. We argue that in small $q_T$ region, the $\alpha(A,q_T)$ for the Drell-Yan a...
1906.08685
Nicol\'as Mileo
Julien Alcaide and Nicol\'as I. Mileo
LHC sensitivity to singly-charged scalars decaying into electrons and muons
15 pages, 8 figures
Phys. Rev. D 102, 075030 (2020)
10.1103/PhysRevD.102.075030
null
hep-ph
http://creativecommons.org/publicdomain/zero/1.0/
Current LHC searches for non-supersymmetric singly-charged scalars, based on Two-Higgs-Doublet models, in general focus the analysis on third-generation fermions in the final state. However, singly-charged scalars in alternative extensions of the scalar sector involve Yukawa couplings not proportional to the mass of ...
[ { "created": "Thu, 20 Jun 2019 15:17:14 GMT", "version": "v1" } ]
2020-10-28
[ [ "Alcaide", "Julien", "" ], [ "Mileo", "Nicolás I.", "" ] ]
Current LHC searches for non-supersymmetric singly-charged scalars, based on Two-Higgs-Doublet models, in general focus the analysis on third-generation fermions in the final state. However, singly-charged scalars in alternative extensions of the scalar sector involve Yukawa couplings not proportional to the mass of th...
2007.10978
Fedor Bezrukov
Fedor Bezrukov and Chris Shepherd
A heatwave affair: mixed Higgs-$R^2$ preheating on the lattice
21 pages 11 figures
null
10.1088/1475-7516/2020/12/028
MAN/HEP/2020/009
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We use lattice methods to perform the first nonlinear study of preheating in $R^2$-healed Higgs inflation for "$R^2$-like" parameters $1.1\times 10^9$ and $1.8\times 10^9$ where the curvature-squared coupling $\beta$ and nonminimal coupling $\xi$ of the Higgs field contribute similarly to the CMB scalar perturbations...
[ { "created": "Tue, 21 Jul 2020 17:56:50 GMT", "version": "v1" } ]
2021-01-06
[ [ "Bezrukov", "Fedor", "" ], [ "Shepherd", "Chris", "" ] ]
We use lattice methods to perform the first nonlinear study of preheating in $R^2$-healed Higgs inflation for "$R^2$-like" parameters $1.1\times 10^9$ and $1.8\times 10^9$ where the curvature-squared coupling $\beta$ and nonminimal coupling $\xi$ of the Higgs field contribute similarly to the CMB scalar perturbations. ...
1006.5593
Paola Ferrario
Paola Ferrario and German Rodrigo
Charge asymmetry of top quarks
Proceedings of XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects, April 19 -23, 2010, Firenze
PoS DIS2010:191,2010
null
IFIC/10-21
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The LHC is a promising machine to discover new physics in the top sector. There are several models that predict the existence of heavy colored resonances decaying to top quarks in the TeV energy range. The production of such resonances might generate a sizable charge asymmetry of top versus antitop quarks. At the Tev...
[ { "created": "Tue, 29 Jun 2010 12:35:01 GMT", "version": "v1" } ]
2010-11-19
[ [ "Ferrario", "Paola", "" ], [ "Rodrigo", "German", "" ] ]
The LHC is a promising machine to discover new physics in the top sector. There are several models that predict the existence of heavy colored resonances decaying to top quarks in the TeV energy range. The production of such resonances might generate a sizable charge asymmetry of top versus antitop quarks. At the Tevat...
1211.4507
Peter Watson
Peter Watson and Hugo Reinhardt (Tuebingen U.)
Bethe-Salpeter equation at leading order in Coulomb gauge
23 pages, 8 figures
null
10.1103/PhysRevD.86.125030
null
hep-ph nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The Bethe-Salpeter equation and leptonic decay constants for pseudoscalar and vector quark-antiquark mesons with arbitrary quark masses are studied in Coulomb gauge, under a leading order truncation. As input, we use a pure linear rising potential, supplemented by a contact term arising from the conservation of total...
[ { "created": "Mon, 19 Nov 2012 17:17:07 GMT", "version": "v1" } ]
2013-05-30
[ [ "Watson", "Peter", "", "Tuebingen U." ], [ "Reinhardt", "Hugo", "", "Tuebingen U." ] ]
The Bethe-Salpeter equation and leptonic decay constants for pseudoscalar and vector quark-antiquark mesons with arbitrary quark masses are studied in Coulomb gauge, under a leading order truncation. As input, we use a pure linear rising potential, supplemented by a contact term arising from the conservation of total c...
1304.2334
Shun Zhou
Ji-Yuan Liu and Shun Zhou
Hybrid Textures of Majorana Neutrino Mass Matrix and Current Experimental Tests
29 pages, 6 figures, more discussions and references added, to appear in Phys. Rev. D
Phys. Rev. D 87 (2013) 093010
10.1103/PhysRevD.87.093010
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Motivated by recent measurements of a relatively large \theta_{13} in the Daya Bay and RENO reactor neutrino experiments, we carry out a systematic analysis of the hybrid textures of Majorana neutrino mass matrix $M_\nu$, which contain one texture zero and two equal nonzero matrix elements. We show that three neutrin...
[ { "created": "Mon, 8 Apr 2013 19:52:15 GMT", "version": "v1" }, { "created": "Fri, 17 May 2013 08:32:15 GMT", "version": "v2" } ]
2013-05-30
[ [ "Liu", "Ji-Yuan", "" ], [ "Zhou", "Shun", "" ] ]
Motivated by recent measurements of a relatively large \theta_{13} in the Daya Bay and RENO reactor neutrino experiments, we carry out a systematic analysis of the hybrid textures of Majorana neutrino mass matrix $M_\nu$, which contain one texture zero and two equal nonzero matrix elements. We show that three neutrino ...
hep-ph/0111215
Kaladi Babu
K.S. Babu (Oklahoma State University) and S.M. Barr (Bartol Research Institute)
Bimaximal Neutrino Mixings from Lopsided Mass Matrices
12 pages in LaTeX, no figures
Phys.Lett.B525:289-296,2002
10.1016/S0370-2693(01)01455-1
OSU-HEP-01-09, BA-01-49
hep-ph
null
Current solar and atmospheric neutrino oscillation data seem to favor a bimaximal pattern for neutrino mixings where the matrix elements U_{e2} and U_{\mu 3} are of order one, while U_{e3} is much smaller. We show that such a pattern can be obtained quite easily in theories with ``lopsided'' mass matrices for the cha...
[ { "created": "Fri, 16 Nov 2001 21:04:13 GMT", "version": "v1" } ]
2011-05-12
[ [ "Babu", "K. S.", "", "Oklahoma State University" ], [ "Barr", "S. M.", "", "Bartol Research\n Institute" ] ]
Current solar and atmospheric neutrino oscillation data seem to favor a bimaximal pattern for neutrino mixings where the matrix elements U_{e2} and U_{\mu 3} are of order one, while U_{e3} is much smaller. We show that such a pattern can be obtained quite easily in theories with ``lopsided'' mass matrices for the charg...
hep-ph/9607284
Joao Soares
Joao M. Soares
Form factor relations for heavy-to-heavy and heavy-to-light meson transitions
13 pages, LaTex, 2 figures
Phys.Rev. D54 (1996) 6837-6841
10.1103/PhysRevD.54.6837
UMHEP-430
hep-ph
null
Relations between the form factors that parametrize the hadronic matrix elements, in spectator decays of heavy mesons, have been derived by Stech within the constituent quark model. In here, we examine these relations using a slightly modified description of the meson states. We find new and very general relations fo...
[ { "created": "Wed, 10 Jul 1996 19:03:58 GMT", "version": "v1" } ]
2009-10-28
[ [ "Soares", "Joao M.", "" ] ]
Relations between the form factors that parametrize the hadronic matrix elements, in spectator decays of heavy mesons, have been derived by Stech within the constituent quark model. In here, we examine these relations using a slightly modified description of the meson states. We find new and very general relations for ...
1912.02034
Kai Urban
Martin Beneke, Caspar Hasner, Kai Urban, Martin Vollmann
Precise yield of high-energy photons from Higgsino dark matter annihilation
30 pages, 5 figures, v2: matches published version + typo in (C.23) fixed
null
10.1007/JHEP03(2020)030
TUM-HEP-1240/19
hep-ph astro-ph.HE
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The impact of electroweak Sudakov logarithms on the endpoint of the photon spectrum for wino dark matter annihilation was studied intensively over the last several years. In this work, we extend these results to Higgsino dark matter $\chi_1^0$. We achieve NLL' resummation accuracy for narrow and intermediate spectral...
[ { "created": "Wed, 4 Dec 2019 15:00:20 GMT", "version": "v1" }, { "created": "Wed, 16 Dec 2020 09:26:38 GMT", "version": "v2" } ]
2020-12-17
[ [ "Beneke", "Martin", "" ], [ "Hasner", "Caspar", "" ], [ "Urban", "Kai", "" ], [ "Vollmann", "Martin", "" ] ]
The impact of electroweak Sudakov logarithms on the endpoint of the photon spectrum for wino dark matter annihilation was studied intensively over the last several years. In this work, we extend these results to Higgsino dark matter $\chi_1^0$. We achieve NLL' resummation accuracy for narrow and intermediate spectral e...
1910.07076
HoSeong La
HoSeong La
Neutrino Oscillations and Energy-Momentum Conservation
4 pages
null
null
null
hep-ph nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
It is proposed that the energy-momentum expectation values of flavor states should be identified with the missing energy-momentum of neutrino processes so that the conservation of energy-momentum can be strictly imposed. It is also observed that there is a plausible condition to express neutrino mixing angles in term...
[ { "created": "Tue, 15 Oct 2019 22:19:01 GMT", "version": "v1" } ]
2019-10-17
[ [ "La", "HoSeong", "" ] ]
It is proposed that the energy-momentum expectation values of flavor states should be identified with the missing energy-momentum of neutrino processes so that the conservation of energy-momentum can be strictly imposed. It is also observed that there is a plausible condition to express neutrino mixing angles in terms ...
1709.03921
Gabriela Pomery Miss
Thomas Blake, Ulrik Egede, Patrick Owen, Gabriela Pomery, Konstantinos Alexandros Petridis
An empirical model of the long-distance contributions to $\bar{B}^{0} \rightarrow \bar{K}^{*0}\mu^{+}\mu^{-}$ transitions
24 pages, 6 figures in main text, 2 figures in appendix, version accepted by journal
Eur. Phys. J. C (2018) 78: 453
10.1140/epjc/s10052-018-5937-3
null
hep-ph hep-ex
http://creativecommons.org/licenses/by/4.0/
A method for analysing the hadronic resonance contributions in $\bar{B}^{0} \rightarrow \bar{K}^{*0}\mu^{+}\mu^{-}$ decays is presented. This method uses an empirical model that relies on measurements of the branching fractions and polarisation amplitudes of final states involving $J^{PC}=1^{--}$ resonances, relative...
[ { "created": "Tue, 12 Sep 2017 15:49:41 GMT", "version": "v1" }, { "created": "Wed, 13 Sep 2017 13:20:01 GMT", "version": "v2" }, { "created": "Thu, 7 Jun 2018 09:56:10 GMT", "version": "v3" } ]
2018-06-08
[ [ "Blake", "Thomas", "" ], [ "Egede", "Ulrik", "" ], [ "Owen", "Patrick", "" ], [ "Pomery", "Gabriela", "" ], [ "Petridis", "Konstantinos Alexandros", "" ] ]
A method for analysing the hadronic resonance contributions in $\bar{B}^{0} \rightarrow \bar{K}^{*0}\mu^{+}\mu^{-}$ decays is presented. This method uses an empirical model that relies on measurements of the branching fractions and polarisation amplitudes of final states involving $J^{PC}=1^{--}$ resonances, relative t...
hep-ph/9608411
W. James Stirling
W. J. Stirling (University of Durham)
DIS96 - Summary
39 pages, LATEX, 26 Postscript figures, uses procl.sty
null
null
DTP/96/68
hep-ph
null
Some of the new experimental results and theoretical developments presented at the Workshop on Deep Inelastic Scattering and Related Phenomena (Rome, April 1996) are reviewed.
[ { "created": "Thu, 22 Aug 1996 18:45:17 GMT", "version": "v1" } ]
2007-05-23
[ [ "Stirling", "W. J.", "", "University of Durham" ] ]
Some of the new experimental results and theoretical developments presented at the Workshop on Deep Inelastic Scattering and Related Phenomena (Rome, April 1996) are reviewed.
1402.1817
Hao Sun
Hao Sun
Probe Anomalous $tq\gamma$ couplings through Single Top Photoproduction at the LHC
37pages, 10 figures, 6 tables, to appear in Nuclear Physics B
Nuclear Physics B 886 (2014) 691-711
10.1016/j.nuclphysb.2014.07.012
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
In this work we study the constraints on the anomalous $tq\gamma$ ($q=u$, $c$) couplings by photon-produced leading single top production and single top jet associated production through the main reaction $pp\rightarrow p\gamma p\rightarrow pt\rightarrow pW(\rightarrow\ell \nu_\ell) b+X$ and $pp\rightarrow p\gamma p\...
[ { "created": "Sat, 8 Feb 2014 04:01:35 GMT", "version": "v1" }, { "created": "Thu, 17 Jul 2014 00:33:36 GMT", "version": "v2" } ]
2014-07-29
[ [ "Sun", "Hao", "" ] ]
In this work we study the constraints on the anomalous $tq\gamma$ ($q=u$, $c$) couplings by photon-produced leading single top production and single top jet associated production through the main reaction $pp\rightarrow p\gamma p\rightarrow pt\rightarrow pW(\rightarrow\ell \nu_\ell) b+X$ and $pp\rightarrow p\gamma p\ri...
1910.04170
Ennio Salvioni
Maximilian Ruhdorfer, Ennio Salvioni and Andreas Weiler
A Global View of the Off-Shell Higgs Portal
12 pages + appendices and references, 10 figures; v2: minor revisions and a few additions, including extra references; v3: new figure comparing VBF reach to parameter regions compatible with first-order EW phase transition (Figure 9), additional references. This version is more up to date than the published one
SciPost Phys. 8, 027 (2020)
10.21468/SciPostPhys.8.2.027
TUM-HEP-1231-19
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We study for the first time the collider reach on the derivative Higgs portal, the leading effective interaction that couples a pseudo Nambu-Goldstone boson (pNGB) scalar Dark Matter to the Standard Model. We focus on Dark Matter pair production through an off-shell Higgs boson, which is analyzed in the vector boson ...
[ { "created": "Wed, 9 Oct 2019 18:00:02 GMT", "version": "v1" }, { "created": "Thu, 2 Jan 2020 13:13:20 GMT", "version": "v2" }, { "created": "Fri, 15 Jan 2021 19:59:13 GMT", "version": "v3" } ]
2021-01-19
[ [ "Ruhdorfer", "Maximilian", "" ], [ "Salvioni", "Ennio", "" ], [ "Weiler", "Andreas", "" ] ]
We study for the first time the collider reach on the derivative Higgs portal, the leading effective interaction that couples a pseudo Nambu-Goldstone boson (pNGB) scalar Dark Matter to the Standard Model. We focus on Dark Matter pair production through an off-shell Higgs boson, which is analyzed in the vector boson fu...
2405.14309
Jun Guo
Jun Guo, Zhaofeng Kang, Ji-Gang Zhao
Gamma-ray Signal from $Z_{N\geq 3}$ Dark Matter-Companion Models
14 pages, 3 figures
null
null
null
hep-ph
http://creativecommons.org/publicdomain/zero/1.0/
In Ref.~\cite{Guo:2021rre}, we proposed to replace the final dark matter (DM) particle in the semi-annihilation mode $\rm DM+DM\to antiDM+Higgs~boson$ with its $Z_{N\geq 3}$ companion, thus reducing DM number density without DM-nucleon scattering. In this work, we study the indirect detection signals from DM annihila...
[ { "created": "Thu, 23 May 2024 08:29:52 GMT", "version": "v1" } ]
2024-05-24
[ [ "Guo", "Jun", "" ], [ "Kang", "Zhaofeng", "" ], [ "Zhao", "Ji-Gang", "" ] ]
In Ref.~\cite{Guo:2021rre}, we proposed to replace the final dark matter (DM) particle in the semi-annihilation mode $\rm DM+DM\to antiDM+Higgs~boson$ with its $Z_{N\geq 3}$ companion, thus reducing DM number density without DM-nucleon scattering. In this work, we study the indirect detection signals from DM annihilati...
2207.06928
Raghuveer Garani
Raghuveer Garani, Michel H.G. Tytgat and J\'er\^ome Vandecasteele
Condensed dark matter with a Yukawa interaction
10+19 pages, 6+8 figures
null
10.1103/PhysRevD.106.116003
null
hep-ph astro-ph.CO hep-th nucl-th
http://creativecommons.org/licenses/by/4.0/
We explore the possible phases of a condensed dark matter (DM) candidate taken to be in the form of a fermion with a Yukawa coupling to a scalar particle, at zero temperature but at finite density. This theory essentially depends on only four parameters, the Yukawa coupling, the fermion mass, the scalar mediator mass...
[ { "created": "Thu, 14 Jul 2022 13:50:33 GMT", "version": "v1" } ]
2022-12-21
[ [ "Garani", "Raghuveer", "" ], [ "Tytgat", "Michel H. G.", "" ], [ "Vandecasteele", "Jérôme", "" ] ]
We explore the possible phases of a condensed dark matter (DM) candidate taken to be in the form of a fermion with a Yukawa coupling to a scalar particle, at zero temperature but at finite density. This theory essentially depends on only four parameters, the Yukawa coupling, the fermion mass, the scalar mediator mass, ...
hep-ph/9405326
null
Harry J. Lipkin
How to Use Weak Decays in Analyses of Data on Nucleon Spin Structure Functions
10 pages, Weizmann Report WIS-94/24/May-PH, Tel Aviv Report TAUP 2165-94
Phys.Lett. B337 (1994) 157-162
10.1016/0370-2693(94)91461-3
null
hep-ph
null
The use of weak decays to determine proton spin structure is examined in view of possible violations of the Bjorken and Gottfried Sum rules, flavor symmetry breaking and flavor asymmetry in the sea. The use of the neutron decay is found to be unaffected by all these. A method for including these effects in analyses o...
[ { "created": "Thu, 19 May 1994 11:40:00 GMT", "version": "v1" } ]
2009-10-28
[ [ "Lipkin", "Harry J.", "" ] ]
The use of weak decays to determine proton spin structure is examined in view of possible violations of the Bjorken and Gottfried Sum rules, flavor symmetry breaking and flavor asymmetry in the sea. The use of the neutron decay is found to be unaffected by all these. A method for including these effects in analyses of ...
0902.2525
Pankaj Jain
Pankaj Jain and Subhadip Mitra
One Loop Calculation of Cosmological Constant in a Scale Invariant Theory
13 pages, 6 figures
Mod.Phys.Lett.A24:2069-2079,2009
10.1142/S0217732309031351
null
hep-ph astro-ph.CO hep-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We compute the cosmological constant in a scale invariant scalar field theory. The gravitational action is also suitably modified to respect scale invariance. Due to scale invariance the theory does not admit a cosmological constant term. The scale invariance is broken by a recently introduced mechanism called cosmol...
[ { "created": "Sun, 15 Feb 2009 07:30:18 GMT", "version": "v1" } ]
2010-11-15
[ [ "Jain", "Pankaj", "" ], [ "Mitra", "Subhadip", "" ] ]
We compute the cosmological constant in a scale invariant scalar field theory. The gravitational action is also suitably modified to respect scale invariance. Due to scale invariance the theory does not admit a cosmological constant term. The scale invariance is broken by a recently introduced mechanism called cosmolog...
0805.2435
Hisakazu Minakata
Hisakazu Minakata
Probing Non-Standard Neutrino Physics at Neutrino Factory and T2KK
Written version of a talk presented at the ``Fourth International Workshop on Neutrino Oscillations in Venice --Ten Years after the Neutrino Oscillations--'', (NO-VE 2008) Venice, Italy. 15-18, April 2008. 20 pages, 9 figures
null
null
null
hep-ph hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We discuss ways to explore non-standard interactions (NSI) which neutrinos may possess by expressing them as effective four Fermi operators with coefficient of the order of (M_{W} / M_{NP})^2 ~0.01 (0.0001) for energy scales of new physics as M_{NP} ~1 (10) TeV. Neutrino Factory is a prime candidate for such apparatu...
[ { "created": "Fri, 16 May 2008 04:20:37 GMT", "version": "v1" } ]
2008-05-19
[ [ "Minakata", "Hisakazu", "" ] ]
We discuss ways to explore non-standard interactions (NSI) which neutrinos may possess by expressing them as effective four Fermi operators with coefficient of the order of (M_{W} / M_{NP})^2 ~0.01 (0.0001) for energy scales of new physics as M_{NP} ~1 (10) TeV. Neutrino Factory is a prime candidate for such apparatus ...
hep-ph/0210428
Kerry Whisnant
V. Barger, D. Marfatia, K. Whisnant
How two neutrino superbeam experiments do better than one
18 pages, 6 PS figures, added references and revised discussion
Phys.Lett.B560:75-86,2003
10.1016/S0370-2693(03)00334-4
MAD-PH-1311
hep-ph
null
We examine the use of two superbeam neutrino oscillation experiments with baselines $\lsim 1000$ km to resolve parameter degeneracies inherent in the three-neutrino analysis of such experiments. We find that with appropriate choices of neutrino energies and baselines two experiments with different baselines can provi...
[ { "created": "Wed, 30 Oct 2002 18:46:50 GMT", "version": "v1" }, { "created": "Mon, 18 Nov 2002 22:12:28 GMT", "version": "v2" } ]
2009-09-15
[ [ "Barger", "V.", "" ], [ "Marfatia", "D.", "" ], [ "Whisnant", "K.", "" ] ]
We examine the use of two superbeam neutrino oscillation experiments with baselines $\lsim 1000$ km to resolve parameter degeneracies inherent in the three-neutrino analysis of such experiments. We find that with appropriate choices of neutrino energies and baselines two experiments with different baselines can provide...
1009.1053
Berndt Muller
Berndt M\"uller and Andreas Sch\"afer
Charge Fluctuations from the Chiral Magnetic Effect in Nuclear Collisions
A numerical error in an earlier version of the manuscript is corrected
Phys.Rev.C82:057902,2010
10.1103/PhysRevC.82.057902
null
hep-ph nucl-th
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We derive a nonlocal effective Lagrangian for the chiral magnetic effect. An electric field is generated by winding number fluctuations of the nonabelian gauge field in the presence of a strong magnetic field. We estimate the magnitude of charge asymmetry fluctuations with respect to the reaction plane induced by the...
[ { "created": "Mon, 6 Sep 2010 13:24:37 GMT", "version": "v1" }, { "created": "Tue, 21 Sep 2010 11:04:08 GMT", "version": "v2" } ]
2010-12-23
[ [ "Müller", "Berndt", "" ], [ "Schäfer", "Andreas", "" ] ]
We derive a nonlocal effective Lagrangian for the chiral magnetic effect. An electric field is generated by winding number fluctuations of the nonabelian gauge field in the presence of a strong magnetic field. We estimate the magnitude of charge asymmetry fluctuations with respect to the reaction plane induced by the c...
hep-ph/0402095
Lawrence Gibbons
M. Battaglia and L. Gibbons
Determination of |Vub|
16 pages, requires mtexsis, to appear in Review of Particle Properties, 2004 ed
null
null
CLNS 04/1864, LBNL-54491
hep-ph
null
The element Vub of the CKM mixing matrix is the smallest of the quark couplings and is crucial in understanding CP violation in the B system. In this review, we discuss the present status of the determination of its magnitude, which involves a significant effort both experimentally and theoretically. Decisive progres...
[ { "created": "Mon, 9 Feb 2004 21:16:58 GMT", "version": "v1" } ]
2007-05-23
[ [ "Battaglia", "M.", "" ], [ "Gibbons", "L.", "" ] ]
The element Vub of the CKM mixing matrix is the smallest of the quark couplings and is crucial in understanding CP violation in the B system. In this review, we discuss the present status of the determination of its magnitude, which involves a significant effort both experimentally and theoretically. Decisive progress ...
1103.3270
Jason Kumar
Jason Kumar, John G. Learned, Michinari Sakai and Stefanie Smith
Dark Matter Detection With Electron Neutrinos in Liquid Scintillation Detectors
5 pages, 4 figures, PDFLaTeX; v2: references added, figures updated, more detailed comparison of liquid scintillation and water Cerenkov detectors (journal version)
null
10.1103/PhysRevD.84.036007
null
hep-ph astro-ph.CO hep-ex
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We consider the prospects for liquid scintillation experiments (with a focus on KamLAND) to detect the flux of electron neutrinos arising from dark matter annihilation in the core of the sun. We show that, with data already taken, KamLAND can provide the greatest sensitivity to the dark matter-proton spin-dependent s...
[ { "created": "Wed, 16 Mar 2011 20:00:01 GMT", "version": "v1" }, { "created": "Tue, 26 Jul 2011 09:08:48 GMT", "version": "v2" } ]
2015-03-19
[ [ "Kumar", "Jason", "" ], [ "Learned", "John G.", "" ], [ "Sakai", "Michinari", "" ], [ "Smith", "Stefanie", "" ] ]
We consider the prospects for liquid scintillation experiments (with a focus on KamLAND) to detect the flux of electron neutrinos arising from dark matter annihilation in the core of the sun. We show that, with data already taken, KamLAND can provide the greatest sensitivity to the dark matter-proton spin-dependent sca...
hep-ph/0410256
Roberto Pittau
F. del Aguila (Granada U. & CAFPE, Granada) and R. Pittau (Granada U. & CAFPE, Granada)
Physics beyond the Standard Model and its Minimal Supersymmetric extension at large colliders
Bibliography updated, 17 pages, talk presented by F. del Aguila at the final meeting of the European Network ``Physics at Colliders'', Montpellier, France, September 26--27, 2004
Acta Phys.Polon. B35 (2004) 2767-2780
null
UG-FT-173/04 and CAFPE-43/04
hep-ph
null
New large colliders will probe scales up to few TeV, indicating the way Nature has chosen to extend the Standard Model. We review alternative scenarios to the traditional Minimal Supersymmetric Standard Model: the little Higgs model, split supersymmetry and extra dimensional models with low energy signals.
[ { "created": "Tue, 19 Oct 2004 09:31:45 GMT", "version": "v1" }, { "created": "Wed, 15 Dec 2004 11:09:46 GMT", "version": "v2" } ]
2007-05-23
[ [ "del Aguila", "F.", "", "Granada U. & CAFPE, Granada" ], [ "Pittau", "R.", "", "Granada U.\n & CAFPE, Granada" ] ]
New large colliders will probe scales up to few TeV, indicating the way Nature has chosen to extend the Standard Model. We review alternative scenarios to the traditional Minimal Supersymmetric Standard Model: the little Higgs model, split supersymmetry and extra dimensional models with low energy signals.
1106.2193
Jeremy Price
Jeremy Price
Randall-Sundrum Models and Holography
Master's thesis. 61 pages, 2 figures
null
null
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
This Master's thesis will introduce the Randall-Sundrum RSI model and overview its general features and basic phenomenology, with the goal of understanding its 5-dimensional geometric structure in terms of its 4-dimensional AdS/CFT dual theory. We discuss mode expansions, boundary terms, field content, and supersymme...
[ { "created": "Sat, 11 Jun 2011 03:27:06 GMT", "version": "v1" } ]
2011-06-14
[ [ "Price", "Jeremy", "" ] ]
This Master's thesis will introduce the Randall-Sundrum RSI model and overview its general features and basic phenomenology, with the goal of understanding its 5-dimensional geometric structure in terms of its 4-dimensional AdS/CFT dual theory. We discuss mode expansions, boundary terms, field content, and supersymmetr...
1612.05492
Yohei Ema
Yohei Ema, Koichi Hamaguchi, Takeo Moroi, Kazunori Nakayama
Flaxion: a minimal extension to solve puzzles in the standard model
23 pages, 1 figure; v2: version published in JHEP
null
10.1007/JHEP01(2017)096
UT-16-36, IPMU16-0189
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We propose a minimal extension of the standard model which includes only one additional complex scalar field, flavon, with flavor-dependent global U(1) symmetry. It not only explains the hierarchical flavor structure in the quark and lepton sector (including neutrino sector), but also solves the strong CP problem by ...
[ { "created": "Fri, 16 Dec 2016 14:48:20 GMT", "version": "v1" }, { "created": "Tue, 24 Jan 2017 04:52:00 GMT", "version": "v2" } ]
2017-03-08
[ [ "Ema", "Yohei", "" ], [ "Hamaguchi", "Koichi", "" ], [ "Moroi", "Takeo", "" ], [ "Nakayama", "Kazunori", "" ] ]
We propose a minimal extension of the standard model which includes only one additional complex scalar field, flavon, with flavor-dependent global U(1) symmetry. It not only explains the hierarchical flavor structure in the quark and lepton sector (including neutrino sector), but also solves the strong CP problem by id...
1301.6764
Martin Spinrath
Stefan Antusch, Stephen F. King, Martin Spinrath
Spontaneous CP violation in A4xSU(5) with Constrained Sequential Dominance 2
25 pages, 6 figures; version to be published in PRD
Phys. Rev. D 87, 096018 (2013)
10.1103/PhysRevD.87.096018
MPP-2013-13, SISSA 04/2013/FISI
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
We revisit a two right-handed neutrino model with two texture zeros, namely an indirect model based on A4 with the recently proposed new type of constrained sequential dominance (CSD2), involving vacuum alignments along the (0,1,-1)^T and (1,0,2)^T directions in flavour space, which are proportional to the neutrino D...
[ { "created": "Mon, 28 Jan 2013 21:00:32 GMT", "version": "v1" }, { "created": "Mon, 13 May 2013 13:46:39 GMT", "version": "v2" } ]
2013-06-04
[ [ "Antusch", "Stefan", "" ], [ "King", "Stephen F.", "" ], [ "Spinrath", "Martin", "" ] ]
We revisit a two right-handed neutrino model with two texture zeros, namely an indirect model based on A4 with the recently proposed new type of constrained sequential dominance (CSD2), involving vacuum alignments along the (0,1,-1)^T and (1,0,2)^T directions in flavour space, which are proportional to the neutrino Dir...
1402.6887
Kazem Azizi
K. Azizi, Y. Sarac, H. Sundu
Analysis of the strong $D_{2}^{*}(2460)^{0}\rightarrow D^+ \pi^- $ and $D_{s2}^{*}(2573)^{+}\rightarrow D^{+} K^{0}$ transitions via QCD sum rules
13 Pages and 7 Tables
null
null
null
hep-ph
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
The strong $D_{2}^{*}(2460)^{0}\rightarrow D^+ \pi^- $ and $D_{s2}^{*}(2573)^{+}\rightarrow D^{+} K^{0}$ transitions are analyzed via three point QCD sum rules. First, we calculate the corresponding strong coupling constants $g_{D_2^*D\pi}$ and $g_{D_{s2}^*DK}$. Then, we use them to calculate the corresponding decay ...
[ { "created": "Thu, 27 Feb 2014 12:35:14 GMT", "version": "v1" }, { "created": "Fri, 26 Sep 2014 13:33:57 GMT", "version": "v2" } ]
2014-09-29
[ [ "Azizi", "K.", "" ], [ "Sarac", "Y.", "" ], [ "Sundu", "H.", "" ] ]
The strong $D_{2}^{*}(2460)^{0}\rightarrow D^+ \pi^- $ and $D_{s2}^{*}(2573)^{+}\rightarrow D^{+} K^{0}$ transitions are analyzed via three point QCD sum rules. First, we calculate the corresponding strong coupling constants $g_{D_2^*D\pi}$ and $g_{D_{s2}^*DK}$. Then, we use them to calculate the corresponding decay wi...
hep-ph/0002232
Hitoshi Murayama
Hitoshi Murayama (UC Berkeley, LBNL)
Supersymmetry Phenomenology
40 pages, uses psfig
null
null
UCB-PTH-00/05
hep-ph
null
This is a very pedagogical review of supersymmetry phenomenology, given at ICTP Summer School in 1999, aimed mostly at students who had never studied supersymmetry before. It starts with an analogy that the reason why supersymmetry is needed is similar to the reason why the positron exists. It introduces the construc...
[ { "created": "Wed, 23 Feb 2000 01:12:51 GMT", "version": "v1" }, { "created": "Sat, 4 Mar 2000 05:21:56 GMT", "version": "v2" } ]
2007-05-23
[ [ "Murayama", "Hitoshi", "", "UC Berkeley, LBNL" ] ]
This is a very pedagogical review of supersymmetry phenomenology, given at ICTP Summer School in 1999, aimed mostly at students who had never studied supersymmetry before. It starts with an analogy that the reason why supersymmetry is needed is similar to the reason why the positron exists. It introduces the constructi...