Inflation and primordial non-Gaussianities of 'generalized Galileons'
146 citations recorded by the source corpus.
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.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/df45ba3357dadbbc38936b2d03a7258be28966da
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In Astronomy and Astrophysics
In Nuclear and High Energy Physics
Citations in the corpus
- Horndeski theory and beyond: a review (2019, background): “The cubic action for the scalar perturbations in the Horndeski theory is given in [77, 78].”
- Inflation, Cosmic Perturbations and Non-Gaussianities (2013, background): “The linear perturbations are considered in [137] and the non-Gaussianities are calculated in [105, 138, 139].”
- Effective field theory approach to quasi-single field inflation and effects of heavy fields (2012, background): “Then, the bispectra of primordial curvature [10–15] and tensor perturbations [16, 17] are obtained as well as their powerspectra [4].”
- Essential Building Blocks of Dark Energy (2013, background): “which confirms [34,35] in the case of generalised Galileon theories.”