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TH Articles

Последние добавления:
2014-08-19
07:40
Gravity and axions from a random UV QFT / Kiritsis, Elias
It is postulated that the UV QFT is enormous and random. The coupling of the Standard Model to such QFT is analyzed. [...]
arXiv:1408.3541; CCTP-2014-14; CERN-PH-TH-2014-153.- 2014 - 39 p. - Published in : EPJ Web Conf. 71 (2014) 00068 Fulltext: PDF; External link: Preprint

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2014-04-08
05:05
New directions for top quark polarization in the $t$-channel process / Aguilar-Saavedra, Juan Antonio (Granada U., Theor. Phys. Astrophys. ; CERN) ; Amor dos Santos, Susana (LIP, Coimbra)
We define three orthogonal axes to investigate the top quark polarization in the $t$-channel single top process. We provide expressions for the polarization in these axes in terms of anomalous $Wtb$ couplings. [...]
arXiv:1404.1585; CERN-PH-TH-2014-086.- Geneva : CERN, 2014 - 6 p. - Published in : Phys. Rev. D 89 (2014) 114009 APS published version, local copy: PDF; Fulltext: PDF; External link: Preprint

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2014-04-02
04:34
Towards precise predictions for Higgs-boson production in the MSSM / Bagnaschi, E (Paris, LPTHE ; UPMC, Paris (main) ; Paris U., IV) ; Harlander, R V (Wuppertal U.) ; Liebler, S (U. Hamburg (main)) ; Mantler, H (CERN) ; Slavich, P (Paris U., IV ; UPMC, Paris (main) ; Paris, LPTHE) ; Vicini, A (Milan U. ; INFN, Milan)
We study the production of scalar and pseudoscalar Higgs bosons via gluon fusion and bottom-quark annihilation in the MSSM. Relying on the NNLO-QCD calculation implemented in the public code SusHi, we provide precise predictions for the Higgs-production cross section in six benchmark scenarios compatible with the LHC searches. [...]
arXiv:1404.0327; CERN-PH-TH-2014-048; DESY 14-040; IFUM 1024-FT; LPN14-061; MCNET-14-07; WUB-14-01.- 2014 - 62 p. - Published in : J. High Energy Phys. 06 (2014) 167 External link: Preprint

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2014-03-20
04:39
From scale invariance to Lorentz symmetry / Sibiryakov, Sergey (CERN ; IPT, Lausanne ; Moscow, INR)
It is shown that a unitary translationally invariant field theory in (1+1) dimensions satisfying isotropic scale invariance, standard assumptions about the spectrum of states and operators and the requirement that signals propagate with finite velocity possesses an infinite dimensional symmetry given by one or a product of several copies of conformal algebra. In particular, this implies presence of one or several Lorentz groups acting on the operator algebra of the theory..
arXiv:1403.4742; CERN-PH-TH-2014-039; INR-TH-2014-006.- 2014 - 5 p. - Published in : Phys. Rev. Lett. 112 (2014) 241602 APS published version, local copy: PDF; External link: Preprint

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2014-03-19
06:50
Emergent Time and the M5-Brane
We consider the maximal super-Yang-Mills theory in 5 Euclidean dimensions with SO(5) R-symmetry and 16 supersymmetries. We argue that the strong coupling limit of this theory (with a possible UV completion) has an emergent time dimension and gives a description of the 5+1 dimensional Lorentz invariant (2,0) theory of the M5-brane, compactified on a timelike circle with radius R=g^2/4\pi^2 . [...]
arXiv:1403.4532; IMPERIAL-TP-2014-CMH-01; CERN-PH-TH-2013-019; KCL-MTH-14-04.- 2014 - 41 p. - Published in : J. High Energy Phys. 06 (2014) 016 External link: Preprint

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2014-03-12
05:20
Characterizing New Physics with Polarized Beams at High-Energy Hadron Colliders / Fuks, Benjamin (CERN ; Strasbourg, IPHC ; Strasbourg, IReS ; U. Strasbourg) ; Proudom, Josselin (LPSC, Grenoble) ; Rojo, Juan (CERN) ; Schienbein, Ingo (LPSC, Grenoble)
The TeV energy region is currently being explored by both the ATLAS and CMS experiments of the Large Hadron Collider and phenomena beyond the Standard Model are extensively searched for. Large fractions of the parameter space of many models have already been excluded, and the ranges covered by the searches will certainly be increased by the upcoming energy and luminosity upgrades. [...]
arXiv:1403.2383; CERN-PH-TH-2014-010; LPSC-14-031.- 2014 - 22 p. - Published in : J. High Energy Phys. 05 (2014) 045 Springer Open Access article : PDF; External link: Preprint

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2014-03-10
04:36
Enhancing the ttH signal through top-quark spin polarization effects at the LHC / Biswas, S (Rome U. ; INFN, Rome) ; Frederix, R (CERN) ; Gabrielli, E (Trieste U. ; NICPB, Tallinn ; INFN, Trieste) ; Mele, B (INFN, Rome)
We compare the impact of top-quark spin polarization effects in Higgs boson production in association with top-quark pairs and in corresponding backgrounds at the LHC. Because of the spin-zero nature of the Higgs boson, one expects, in the chiral limit for the top quarks, a substantial complementarity in $t\bar t$ spin correlations for a Higgs decaying into fermions/gauge-bosons and $t\bar{t}$ spin correlations for the corresponding irreducible $t\bar t f\bar f/VV$ backgrounds. [...]
arXiv:1403.1790; CERN-PH-TH-2014-037.- 2014 - 18 p. - Published in : J. High Energy Phys. 07 (2014) 020 External link: Preprint

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2014-02-27
05:15
Constraining neutron star matter with QCD / Kurkela, Aleksi (CERN) ; Fraga, Eduardo S (Frankfurt U. ; Frankfurt U., FIAS ; Rio de Janeiro Federal U.) ; Schaffner-Bielich, Jurgen (Frankfurt U.) ; Vuorinen, Aleksi (Helsinki U. ; Helsinki Inst. of Phys.)
In recent years, there have been several successful attempts to constrain the equation of state of neutron star matter using input from low-energy nuclear physics and observational data. We demonstrate that significant further restrictions can be placed by additionally requiring the pressure to approach that of deconfined quark matter at high densities. [...]
arXiv:1402.6618; CERN-PH-TH-2014-032; HIP-2014-02-TH.- 2014 - 9 p. - Published in : Astrophys.J. 789 (2014) 127 External link: Preprint

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2014-02-26
04:34
Benchmarks for Dark Matter Searches at the LHC / de Simone, Andrea (SISSA, Trieste ; INFN, Trieste) ; Giudice, Gian Francesco (CERN ; Intl. Solvay Inst., Brussels) ; Strumia, Alessandro (Pisa U. ; INFN, Pisa ; NICPB, Tallinn)
We propose some scenarios to pursue dark matter searches at the LHC in a fairly model-independent way. The first benchmark case is dark matter co-annihilations with coloured particles (gluinos or squarks being special examples). [...]
arXiv:1402.6287; CERN-PH-TH-2014-008; SISSA 01-2014-FISI.- 2014 - 22 p. - Published in : J. High Energy Phys. 06 (2014) 081 External link: Preprint

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2014-02-21
04:15
Saturation effects in forward-forward dijet production in p+Pb collisions / van Hameren, A (Cracow, INP) ; Kotko, P (Cracow, INP) ; Kutak, K (Cracow, INP) ; Marquet, C (Ecole Polytechnique, CPHT) ; Sapeta, S (CERN)
We study saturation effects in the production of forward dijets in proton-lead collisions at the Large Hadron Collider, using the framework of High Energy Factorization. Such configurations, with both jets produced in the forward direction, probe the gluon density of the lead nucleus at small longitudinal momentum fraction, and also limit the phase space for emissions of additional jets. [...]
arXiv:1402.5065; CERN-PH-TH-2014-029; CPHT-RR005.0214; IFJPAN-IV-2014-2.- 2014 - 12 p. - Published in : Phys. Rev. D 89 (2014) 094014 APS published version, local copy: PDF; External link: Preprint

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