Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 9, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2013/09/037
Keywords
inflation; non-gaussianity; cosmological perturbation theory
Funding
- DOE at the University of Minnesota [DE-FG02-94ER-40823]
- PRIN project La Ricerca di non-Gaussianita Primordiale
- Cosmology Group at the University of Padova
- INFN, Sezion di Padova
Ask authors/readers for more resources
We calculate the trispectrum of curvature perturbations for a model of inflation endowed with Galilean symmetry at the level of the fluctuations around an FRW background. Such a model has been shown to posses desirable properties such as non-renormalization of the leading operators. The cubic curvature fluctuations of this model produce quite distinct signatures at the level of the bispectrum. Our analysis shows how this holds true at higher order in perturbations. We provide a detailed study of the trispectrum shape-functions in different configurations and a comparison with existent literature. Most notably, predictions markedly differ from their P(X, phi) counterpart in the so called equilateral trispectrum configuration.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available