| Domaine : |
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Physique/Physique des Hautes Energies - Théorie
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| Titre : |
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Inflation and primordial non-Gaussianities of "generalized Galileons" |
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| Auteur(s) : |
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X. Gao1, D.A. Steer1 |
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| Laboratoire : |
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| équipe(s) de recherche : |
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APC - THEORIE |
| Résumé : |
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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. |
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Langue du texte
intégral : |
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Anglais |
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Date de production,
écriture : |
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22/12/2011 |
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| Journal : |
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| Journal of Cosmology and Astroparticle Physics |
| Publisher |
Institute of Physics (IOP) |
| ISSN |
1475-7508 (eISSN : 1475-7516) |
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| Audience : |
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internationale |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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| Date de publication : |
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12/2011 |
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| Volume : |
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12 |
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| Page, identifiant, ... : |
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019 |
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| Commentaire : |
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19 pages, no figure |
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