http://arxiv.org/abs/1402.1856
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.
K. Mukaida, K. Nakayama and M. Takimoto
Tue, 11 Feb 14
50/55
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