Inflation and primordial non-Gaussianities of "generalized Galileons"

X. Gao 1 D.A. Steer 2
2 APC - THEORIE
APC - UMR 7164 - AstroParticule et Cosmologie
Abstract : 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.
Document type :
Journal articles
Journal of Cosmology and Astroparticle Physics, Institute of Physics (IOP), 2011, 12, pp.019. <10.1088/1475-7516/2011/12/019>


https://hal.archives-ouvertes.fr/hal-00716523
Contributor : Danièle Steer <>
Submitted on : Tuesday, July 10, 2012 - 4:50:48 PM
Last modification on : Thursday, April 23, 2015 - 2:01:23 PM

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X. Gao, D.A. Steer. Inflation and primordial non-Gaussianities of "generalized Galileons". Journal of Cosmology and Astroparticle Physics, Institute of Physics (IOP), 2011, 12, pp.019. <10.1088/1475-7516/2011/12/019>. <hal-00716523>

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