Curvaton Dynamics and the Non-Linearity Parameters in Curvaton Model

Details Curvaton Dynamics and the Non-Linearity Parameters in Curvaton Model Curvaton Dynamics and the Non-Linearity Parameters in Curvaton Model

2008-08-08

arxiv.org/abs/0808.1168v2

JCAP 0809:025,2008

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, 4 figures; refs added

Scientific paper

10.1088/1475-7516/2008/09/025

We investigate the curvaton dynamics and the non-linearity parameters in curvaton model with potential slightly deviating from the quadratic form in detail. The non-linearity parameter $g_{NL}$ will show up due to the curvaton self-interaction. We also point out that the leading order of non-quadratic term in the curvaton potential can be negative, for example in the axion-type curvaton model. If a large positive $g_{NL}$ is detected, the axion-type curvaton model will be preferred.

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