Galileon inflation

Burrage, Clare, de Rahm, Claudia, Seery, David and Tolley, Andrew J (2011) Galileon inflation. Journal of Cosmology and Astroparticle Physics, 2011 (01). 014. ISSN 1475-7516

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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 fNLproptocs-2.

Item Type: Article
Additional Information: Author list in alphabetical order
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: David Seery
Date Deposited: 06 Feb 2012 19:35
Last Modified: 03 Apr 2012 08:30
URI: http://sro.sussex.ac.uk/id/eprint/21399
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