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Letzte Einträge:
2016-12-02
12:44
Phenomenological analysis of associated production of $Z^0+b$ in the $b \rightarrow J/\psi X$ decay channel at the LHC / Lansberg, Jean-Philippe (Orsay, IPN) ; Shao, Hua-Sheng (CERN)
The ATLAS collaboration recently reported on the first observation of associated-production of a $Z^0$ boson with a $J/\psi$. [...]
arXiv:1611.09303 ; CERN-TH-2016-244.
- 2016. - 12 p.
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2016-12-02
12:37
Constraints on violation of Lorentz invariance from atmospheric showers initiated by multi-TeV photons / Rubtsov, Grigory (Moscow, INR) ; Satunin, Petr (Moscow, INR) ; Sibiryakov, Sergey (Moscow, INR ; CERN ; EPFL, Lausanne, LPPC)
We discuss the effect of hypothetical violation of Lorentz invariance at high energies on the formation of atmospheric showers by very-high-energy gamma rays. [...]
arXiv:1611.10125 ; CERN-TH-2016-246 ; INR-TH-2016-044.
- 2016. - 20 p.
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2016-11-01
07:47
Massless Interacting Scalar Fields in de Sitter space / Nacir, Diana López (CERN) ; Mazzitelli, Francisco D (Balseiro Inst., San Carlos de Bariloche) ; Trombetta, Leonardo G (Balseiro Inst., San Carlos de Bariloche)
We present a method to compute the two-point functions for an $O(N)$ scalar field model in de Sitter spacetime, avoiding the well known infrared problems for massless fields. The method is based on an exact treatment of the Euclidean zero modes and a perturbative one of the nonzero modes, and involves a partial resummation of the leading secular terms. [...]
arXiv:1610.09943; CERN-TH-2016-151.- 2016 - 8 p. - Published in : EPJ Web Conf. 125 (2016) 05019 Fulltext: PDF; External link: Preprint

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2016-11-01
07:46
Likelihood Analysis of Supersymmetric SU(5) GUTs / Bagnaschi, E (DESY) ; Costa, J.C. (Imperial Coll., London) ; Sakurai, K. (Durham U., IPPP ; Warsaw U.) ; Borsato, M. (Santiago de Compostela U.) ; Buchmueller, O. (Imperial Coll., London) ; Cavanaugh, R. (Fermilab ; Illinois U., Chicago) ; Chobanova, V. (Santiago de Compostela U.) ; Citron, M. (Imperial Coll., London) ; De Roeck, A. (CERN ; Antwerp U.) ; Dolan, M.J. (Melbourne U.) et al.
We perform a likelihood analysis of the constraints from accelerator experiments and astrophysical observations on supersymmetric (SUSY) models with SU(5) boundary conditions on soft SUSY-breaking parameters at the GUT scale. [...]
arXiv:1610.10084 ; KCL-PH-TH-2016-57 ; CERN-TH-2016-217 ; DESY 16-156 ; IIFT-UAM-CSIC-16-105 ; FTPI-MINN-16-29 ; UMN-TH-3609-16 ; IPPP-16-97.
- 2016. - 37 p.
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2016-10-28
07:41
D = 3 Unification of Curious Supergravities / Duff, M J (Imperial Coll., London ; Oxford U., Inst. Math.) ; Ferrara, S (CERN ; INFN, Italy ; UCLA) ; Marrani, A (Enrico Fermi Ctr., Rome ; INFN, Padua ; CERN)
We consider the dimensional reduction to D = 3 of four maximal-rank supergravities which preserve minimal supersymmetry in D = 11, 7, 5 and 4. [...]
arXiv:1610.08800 ; IMPERIAL-TP-2016-MJD-3 ; CERN-TH-2016-225 ; DFPD-2016-TH-18.
- 2016. - 1+7 p.
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2016-10-28
07:40
Groomed jets in heavy-ion collisions: sensitivity to medium-induced bremsstrahlung / Mehtar-Tani, Yacine (Washington U., Seattle) ; Tywoniuk, Konrad (CERN)
We argue that contemporary jet substructure techniques might facilitate a more direct measurement of hard medium-induced gluon bremsstrahlung in heavy-ion collisions, and focus specifically on the "soft drop declustering" procedure that singles out the two leading jet substructures. [...]
arXiv:1610.08930 ; INT-PUB-16-038 ; CERN-TH-2016-227.
- 2016. - 20 p.
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2016-10-28
07:38
Accurate initial conditions in mixed Dark Matter--Baryon simulations / Valkenburg, Wessel (CERN) ; Villaescusa-Navarro, Francisco (San Diego, CASS ; Trieste Observ. ; INFN, Trieste)
We quantify the error in the results of mixed baryon--dark-matter hydrodynamic simulations, stemming from outdated approximations for the generation of initial conditions. [...]
arXiv:1610.08501 ; CERN-TH-2016-226.
- 2016. - 10 p.
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2016-10-26
08:39
A Clockwork Theory / Giudice, Gian F (CERN) ; McCullough, Matthew (CERN)
The clockwork is a mechanism for generating light particles with exponentially suppressed interactions in theories which contain no small parameters at the fundamental level. [...]
arXiv:1610.07962 ; CERN-TH-2016-223.
- 2016. - 26 p.
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2016-10-26
08:36
Spectator Higgs, large-scale gauge fields and the non-minimal coupling to gravity / Giovannini, Massimo (CERN ; INFN, Milan Bicocca)
Even if the Higgs field does not affect the evolution of the background geometry, its massive inhomogeneities induce large-scale gauge fields whose energy density depends on the slow-roll parameters, on the effective scalar mass and, last but not least, on the dimensionless coupling to the space-time curvature. [...]
arXiv:1610.07977 ; CERN-TH-2016-193.
- 2016. - 20 p.
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2016-10-26
08:35
Linearized supergravity with a dynamical preferred frame / Marakulin, Arthur (Moscow, INR) ; Sibiryakov, Sergey (Moscow, INR ; CERN ; Ecole Polytechnique, Lausanne)
We study supersymmetric extension of the Einstein-aether gravitational model where local Lorentz invariance is broken down to the subgroup of spatial rotations by a vacuum expectation value of a timelike vector field. [...]
arXiv:1610.07805 ; CERN-TH-2016-219 ; INR-TH-2016-038.
- 2016. - 35 p.
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