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arXiv · 1407.7082

Polynomial Chaotic Inflation in Supergravity Revisited

Kazunori Nakayama·Fuminobu Takahashi·Tsutomu T. Yanagida
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Abstract

We revisit a polynomial chaotic inflation model in supergravity which we proposed soon after the Planck first data release. Recently some issues have been raised in Ref.[12], concerning the validity of our polynomial chaotic inflation model. We study the inflaton dynamics in detail, and confirm that the inflaton potential is very well approximated by a polynomial potential for the parameters of our interest in any practical sense, and in particular, the spectral index and the tensor-to-scalar ratio can be estimated by single-field approximation. This justifies our analysis of the polynomial chaotic inflation in supergravity.

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Kazunori Nakayama, Fuminobu Takahashi, Tsutomu T. Yanagida. 2014-07-26. Polynomial Chaotic Inflation in Supergravity Revisited. https://doi.org/10.1016/j.physletb.2014.08.043

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