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arXiv · 1009.2497

Galileon inflation

Clare Burrage·Claudia de Rham·David Seery·Andrew J. Tolley
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Abstract

Galileon inflation is a radiatively stable higher derivative model of inflation. The model is determined by a finite number of relevant operators which are protected by a covariant generalization of the Galileon shift symmetry. We show that the nongaussianity of the primordial density perturbation generated during an epoch of Galileon inflation is a particularly powerful observational probe of these models and that, when the speed of sound is small, fNL can be larger than the usual result fNL ~ 1/c_s^2.

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Clare Burrage, Claudia de Rham, David Seery, Andrew J. Tolley. 2010-09-13. Galileon inflation. https://doi.org/10.1088/1475-7516/2011/01/014

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