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2014

Suppressed Non-Gaussianity in the Curvaton Model

Mukaida, Kyohei, Nakayama, Kazunori, Takimoto, Masahiro

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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.

Suppressed Non-Gaussianity in the Curvaton Model · Around

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