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2014

Polynomial Chaotic Inflation in Supergravity Revisited

Nakayama, Kazunori, Takahashi, Fuminobu, Yanagida, Tsutomu T.

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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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Then

R. Kallosh and A. Linde, JCAP 1011
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2010
Later among the works it cites.
K. Nakayama, F. Takahashi and T. T. Yanagida, Phys. Lett. B 725
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2013
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K. Nakayama, F. Takahashi and T. T. Yanagida, JCAP 1308
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