CERN Accelerating science

CERN Theory

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2014-11-20
08:20
Small-radius jets to all orders in QCD / Dasgupta, Mrinal ; Dreyer, Frédéric ; Salam, Gavin P ; Soyez, Gregory
As hadron collider physics continues to push the boundaries of precision, it becomes increasingly important to have methods for predicting properties of jets across a broad range of jet radius values R, and in particular for small R. [...]
arXiv:1411.5182 ; CERN-PH-TH-2014-222.
- 2014. - 34 p.
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2014-11-19
09:18
N=2 Born-Infeld Attractors / Ferrara, S ; Porrati, M ; Sagnotti, A
We derive new types of $U(1)^n$ Born-Infeld actions based on N=2 special geometry in four dimensions. [...]
arXiv:1411.4954 ; CERN-PH-TH-2014-228.
- 2014. - 16 p.
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2014-11-13
07:53
On sgoldstino-less supergravity models of inflation / Dall'Agata, Gianguido (Padua U. ; Padua U., Astron. Dept. ; INFN, Padua) ; Zwirner, Fabio (Padua U. ; Padua U., Astron. Dept. ; INFN, Padua ; CERN)
We go a step further in the search for a consistent and realistic supergravity model of large-field inflation by building a class of models with the following features: during slow-roll, all the scalar fields other than the inflaton are frozen by large inflaton-dependent masses or removed from the spectrum; at the end of inflation, supersymmetry is spontaneously broken with naturally vanishing classical vacuum energy. [...]
arXiv:1411.2605 ; CERN-PH-TH-2014-199 ; DFPD-2014-TH-16.
- 2014. - 19 p.
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2014-11-13
07:52
Nonlinear evolution of density and flow perturbations on a Bjorken background / Brouzakis, Nikolaos (Athens U.) ; Floerchinger, Stefan (CERN) ; Tetradis, Nikolaos (Athens U. ; CERN) ; Wiedemann, Urs Achim (CERN)
Density perturbations and their dynamic evolution from early to late times can be used for an improved understanding of interesting physical phenomena both in cosmology and in the context of heavy-ion collisions. [...]
arXiv:1411.2912 ; CERN-PH-TH-2014-223.
- 2014. - 30 p.
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2014-11-13
07:52
Signs for new physics in the recent LHCb data? / Hurth, T (Mainz U., Inst. Phys. ; U. Mainz, PRISMA) ; Mahmoudi, F (Lyon U. ; Lyon Observ. ; Lyon, Ecole Normale Superieure ; CERN)
We comment on some tensions with the Standard Model predictions in the recent LHCb data..
arXiv:1411.2786 ; CERN-PH-TH-2014-212 ; MITP-14-087.
- 2014. - 6 p.
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2014-11-13
07:49
Accelerating cosmological expansion from shear viscosity / Floerchinger, Stefan (CERN) ; Tetradis, Nikolaos (Athens U. ; CERN) ; Wiedemann, Urs Achim (CERN)
The dissipation of energy from local velocity perturbations in the cosmological fluid affects the time evolution of spatially averaged fluid dynamic fields and the cosmological solution of Einstein's field equations. [...]
arXiv:1411.3280 ; CERN-PH-TH-2014-224.
- 2014. - 5 p.
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2014-11-13
07:49
WIMPs at the Galactic Center / Agrawal, Prateek (Fermilab) ; Batell, Brian (CERN) ; Fox, Patrick J (Fermilab) ; Harnik, Roni (Fermilab)
Simple models of weakly interacting massive particles (WIMPs) predict dark matter annihilations into pairs of electroweak gauge bosons, Higgses or tops, which through their subsequent cascade decays produce a spectrum of gamma rays. [...]
arXiv:1411.2592 ; FERMILAB-PUB-14-411-T ; CERN-PH-TH-2014-219.
- 2014. - 26 p.
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2014-11-11
08:12
Complementarity of direct and indirect searches in the pMSSM / Mahmoudi, F (Lyon U. ; Lyon Observ. ; Lyon, Ecole Normale Superieure) ; Arbey, A (CERN)
We explore the pMSSM parameter space in view of the constraints from SUSY and monojet searches at the LHC, from Higgs data and flavour physics observables, as well as from dark matter searches. [...]
arXiv:1411.2128 ; CERN-PH-TH-2014-211.
- 2014. - 6 p.
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2014-11-11
08:12
Why should we care about the top quark Yukawa coupling? / Bezrukov, Fedor (CERN ; Connecticut U. ; RIKEN BNL) ; Shaposhnikov, Mikhail (IPT, Lausanne)
We give an answer to the question formulated in the title..
arXiv:1411.1923 ; CERN-PH-TH-2014-218.
- 2014. - 8 p.
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2014-11-11
08:10
The Elusive Gluon / Chala, Mikael (CAFPE, Granada ; DESY) ; Juknevich, Jose (SISSA, Trieste ; INFN, Trieste) ; Perez, Gilad (Weizmann Inst.) ; Santiago, Jose (CAFPE, Granada ; CERN)
We study the phenomenology of vector resonances in the context of natural composite Higgs models. [...]
arXiv:1411.1771 ; CAFPE-185-14 ; CERN-PH-TH-2014-216 ; DESY 14-213 ; SISSA 60-2014-FISI ; UG-FT-315-14.
- 2014. - 32 p.
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