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Inflation and primordial non-Gaussianities of "generalized Galileons"
Gao X., Steer D.A.
Journal of Cosmology and Astroparticle Physics 12 (2011) 019 - http://hal.archives-ouvertes.fr/hal-00716523
Physique/Physique des Hautes Energies - Théorie
Inflation and primordial non-Gaussianities of "generalized Galileons"
X. Gao1, D.A. Steer1
1 :  APC - UMR 7164 - AstroParticule et Cosmologie
http://www.apc.univ-paris7.fr/
CNRS : UMR7164 – IN2P3 – Observatoire de Paris – Université Paris VII - Paris Diderot – CEA : DSM/IRFU
APC - UMR 7164, Université Paris Diderot, 10 rue Alice Domon et Léonie Duquet, case postale 7020, F-75205 Paris Cedex 13
France
APC - THEORIE
We set up cosmological perturbation theory and study the cosmological implications of the so-called "generalized Galileon" developed in [6, 7]. This is the most general scalar field theory whose Lagrangian contains derivatives up to second order while keeping second order equations of motion, and contains as sub-cases k-inflation, G-inflation and many other models. We calculate the power spectrum of the primordial curvature perturbation, finding a modification of the usual consistency relation of the tensor-to-scalar ratio in k-inflation or perfect fluid models. Finally we also calculate the bispectrum, which contains no new shapes beyond those of k-inflation.
Anglais
22/12/2011

Journal of Cosmology and Astroparticle Physics
Publisher Institute of Physics (IOP)
ISSN 1475-7508 (eISSN : 1475-7516)
internationale
Articles dans des revues avec comité de lecture
12/2011
12
019

19 pages, no figure

Lien vers le texte intégral : 
http://fr.arXiv.org/abs/1107.2642