# TH Articles

Последние добавления:
2013-10-08
04:24
 Inflationary susceptibilities, duality and large-scale magnetic fields generation / Giovannini, Massimo (CERN ; INFN, Milan Bicocca) We investigate what can be said about the interaction of scalar fields with Abelian gauge fields during a quasi-de Sitter phase of expansion and under the assumption that the electric and the magnetic susceptibilities do not coincide. The duality symmetry, transforming the magnetic susceptibility into the inverse of the electric susceptibility, exchanges the magnetic and electric power spectra. [...] arXiv:1310.1802; CERN-PH-TH-2013-224.- 2013 - 29 p. - Published in : Phys. Rev. D 88 (2013) 083533 APS Published version, local copy: PDF; External link: Preprint

2013-09-23
15:40
 Production processes at extremely high energies / Gastmans, R (Leuven U.) ; (Wisconsin U., Madison) ; (CERN ; Harvard U.) The production processes are identified that contribute to the rise of the total cross section in proton-proton scattering at extremely high energies, s->~. At such energies, the scattering can be described by a black disk (completely absorptive) with a radius expanding logarithmically with energy surrounded by a gray fringe (partially absorptive). [...] CERN-PH-TH-2012-230.- 2013 - 5 p. - Published in : Phys. Lett. B 720 (2013) 205–209

2013-09-05
04:16
 Naive Dimensional Analysis Counting of Gauge Theory Amplitudes and Anomalous Dimensions / Jenkins, Elizabeth E (UC, San Diego) ; Manohar, Aneesh V (UC, San Diego) ; Trott, Michael (CERN) We show that naive dimensional analysis (NDA) is equivalent to the result that L-loop scattering amplitudes have perturbative order N=L+Delta, with a shift Delta that depends on the NDA-weight of operator insertions. The NDA weight of an operator is defined in this paper, and the general NDA formula for perturbative order N is derived. [...] arXiv:1309.0819; CERN-PH-TH-2013-213.- 2013 - 10 p. - Published in : Phys. Lett. B 726 (2013) 697-702 External link: Preprint

2013-08-12
04:11
 Supersymmetry with Light Dark Matter confronting the recent CDMS and LHC Results / Arbey, Alexandre (Lyon Observ. ; Lyon, Ecole Normale Superieure ; Lyon U. ; CERN) ; Battaglia, Marco (UC, Santa Cruz, Inst. Part. Phys. ; CERN) ; Mahmoudi, Farvah (Clermont-Ferrand U. ; CERN) We revisit MSSM scenarios with light neutralino as a dark matter candidate in view of the latest LHC and dark matter direct and indirect detection experiments. We show that scenarios with a very light neutralino (~ 10 GeV) and a scalar bottom quark close in mass, can satisfy all the available constraints from LEP, Tevatron, LHC, flavour and low energy experiments and provide solutions in agreement with the bulk of dark matter direct detection experiments, and in particular with the recent CDMS results.. arXiv:1308.2153; CERN-PH-TH-2013-177.- Geneva : CERN, 2013 - 10 p. - Published in : Phys. Rev. D 88 (2013) 095001 APS Published version, local copy: PDF; External link: Preprint

2013-08-09
04:20
 Simulating spin-3/2 particles at colliders / Christensen, Neil D (Pittsburgh U.) ; de Aquino, P (Brussels U., IIHE ; Vrije U., Brussels ; Intl. Solvay Inst., Brussels) ; Deutschmann, N (Lyon U. ; Paris, IN2P3 ; CNRS, France ; Lyon, IPN) ; Duhr, C (Zurich, ETH ; Durham U., IPPP) ; Fuks, B (CERN ; Strasbourg, IPHC ; U. Strasbourg ; CNRS, France ; Paris, IN2P3) ; Garcia-Cely, C (Munich, Tech. U.) ; Mattelaer, O (Louvain U., CP3 ; Illinois U., Urbana) ; Mawatari, K (Brussels U., IIHE ; Vrije U., Brussels ; Intl. Solvay Inst., Brussels) ; Oexl, B (Brussels U., IIHE ; Vrije U., Brussels ; Intl. Solvay Inst., Brussels) ; Takaesu, Y (Seoul Natl. U., Dept. Phys. Astron. ; Korea Inst. Advanced Study, Seoul) Support for interactions of spin-3/2 particles is implemented in the FeynRules and ALOHA packages and tested with the MadGraph 5 and CalcHEP event generators in the context of three phenomenological applications. In the first, we implement a spin-3/2 Majorana gravitino field, as in local supersymmetric models, and study gravitino and gluino pair-production. [...] arXiv:1308.1668; CERN-PH-TH-2013-187; IPPP-13-56; DCPT-13-172; MCNET-13-09; PITT-PACC-1307; KIAS-P13044; TUM-HEP 900-13.- 2013 - 20 p. - Published in : Eur. Phys. J. C 73 (2013) 2580 External link: Preprint

2013-08-09
04:18
 Inflation induced by Gravitino Condensation in Supergravity / Ellis, John (King's College London ; CERN) ; Mavromatos, Nick E (King's College London ; CERN) We discuss the emergence of an inflationary phase in supergravity with the super-Higgs effect due to dynamical spontaneous breaking of supersymmetry, in which the role of the inflaton is played by the gravitino condensate. Realistic models compatible with the Planck satellite CMB data are found in conformal supergravity scenarios with dynamical gravitino masses that are small compared to the Planck mass, as could be induced by a non-trivial vacuum expectation value of the dilaton superfield of appropriate magnitude.. arXiv:1308.1906; KCL-PH-TH-2013-24; LCTS-2013-15; CERN-PH-TH-2013-184.- 2013 - 13 p. - Published in : Phys. Rev. D 88 (2013) 085029 APS Published version, local copy: PDF; External link: Preprint

2013-08-07
04:23
 Measuring CP Violation in $h \to \tau^+ \tau^-$ at Colliders / Harnik, Roni (Fermilab) ; Martin, Adam (Notre Dame U. ; CERN) ; Okui, Takemichi (Florida State U.) ; Primulando, Reinard (Johns Hopkins U.) ; Yu, Felix (Fermilab) We investigate the LHC and Higgs Factory prospects for measuring the CP phase in the Higgs-tau-tau coupling. Currently this phase can be anywhere between 0 degrees (CP even) and 90 degrees (CP odd). [...] arXiv:1308.1094; CERN-PH-TH-2013-181; FERMILAB-PUB-13-296-T.- 2013 - 12 p. - Published in : Phys. Rev. D 88 (2013) 076009 APS Published version, local copy: PDF; External link: Preprint

2013-08-05
04:11
 Production of J/$\psi+\eta_{c}$ vs. J/$\psi+J/\psi$ at the LHC: Importance of the Real $\alpha_s^5$ corrections / Lansberg, Jean-Philippe (Orsay, IPN) ; Shao, Hua-Sheng (Peking U., SKLNPT ; CERN) We proceed for the first time to the evaluation of the Born cross section for J/psi+eta(c) production, namely via g+g -> J/psi+eta(c)+g, and show that it has a harder P_T spectrum than the J/psi-pair yield at Born level. If one stuck to a comparison at Born level, one would conclude that J/psi+eta(c) production would surpass that of J/psi+J/psi at large P_T. [...] arXiv:1308.0474; CERN-PH-TH-2013-185.- 2013 - 9 p. - Published in : Phys. Rev. Lett. 111 (2013) 122001 APS Published version, local copy: PDF; External link: Preprint

2013-07-30
15:00
 Walking near a conformal ﬁxed point / de Forcrand, P (CERN ; Zurich, ETH) ; Pepe, M (INFN, Milan Bicocca) ; Wiese, U.J (Bern U., AIUB) We investigate the 2-d O(3) model with a q-term as a toy model for slowly walking 4-d nonAbelian gauge theories. Using the very efﬁcient meron-cluster algorithm, an accurate investigation of the scale dependence of the renormalized coupling is carried out for different values of the vacuum angle q. [...] CERN-PH-TH-2012-292.- 2012 - Published in : PoS: LATTICE2012 (2012) , pp. 041 External link: Published version from PoS In : 30th International Symposium on Lattice Field Theory, Cairns, Australia, 24 - 29 Jun 2012, pp.041

2013-07-30
04:30
 Characterization of initial fluctuations for the hydrodynamical description of heavy ion collisions / Floerchinger, Stefan (CERN) ; Wiedemann, Urs Achim (CERN) Event-by-event fluctuations in the initial conditions for a hydrodynamical description of heavy-ion collisions are characterized. We propose a Bessel-Fourier decomposition with respect to the azimuthal angle, the radius in the transverse plane and rapidity. [...] arXiv:1307.7611; CERN-PH-TH-2013-179.- 2013 - 40 p. - Published in : Phys. Rev. C 88 (2013) 044906 APS Open Access article: PDF; External link: Preprint