Galileon inflation

2010/09/13 by Clare Burrage, Claudia de Rham, David Seery +1 · 1 voice · 1 citation
#hep-th #astro-ph.CO #gr-qc

paper · pdf · doi:10.1088/1475-7516/2011/01/014

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_s².

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• The Wave Function of the Universe and Inflation

Discussions

• Here is a woefully incomplete and probably biased attempt to give a crash course on Galileons. I'll also just state up front my knowledge is a little out of date (my serious following of this story en [stackexchange, 7 points]

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