Suppressed Non-Gaussianity in the Curvaton Model
Cosmology and Nongalactic Astrophysics
2014-06-25 v3 High Energy Physics - Phenomenology
Abstract
We show that the local type non-Gaussianity in a class of curvaton models is suppressed, i.e. the non-linearity parameters f_{NL} and those related with higher order statistics can be at most O(1), even if the curvaton energy density is subdominant at the decay. This situation is naturally realized in a very simple curvaton potential with quadratic term plus quartic term.
Keywords
Cite
@article{arxiv.1402.1856,
title = {Suppressed Non-Gaussianity in the Curvaton Model},
author = {Kyohei Mukaida and Kazunori Nakayama and Masahiro Takimoto},
journal= {arXiv preprint arXiv:1402.1856},
year = {2014}
}
Comments
5 pages, 2 figures; added references; to appear in Phys.Rev.D