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arXiv · 1305.5099

Polynomial Chaotic Inflation in Supergravity

Kazunori Nakayama·Fuminobu Takahashi·Tsutomu T. Yanagida
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Abstract

We present a general polynomial chaotic inflation model in supergravity, for which the predicted spectral index and tensor-to-scalar ratio can lie within the 1 sigma region allowed by the Planck results. Most importantly, the predicted tensor-to-scalar ratio is large enough to be probed in the on-going and future B-mode experiments. We study the inflaton dynamics and the subsequent reheating process in a couple of specific examples. The non-thermal gravitino production from the inflaton decay can be suppressed in a case with a discrete Z_2 symmetry. We find that the reheating temperature can be naturally as high as O(10^{9-10}) GeV, sufficient for baryon asymmetry generation through (non-)thermal leptogenesis.

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Kazunori Nakayama, Fuminobu Takahashi, Tsutomu T. Yanagida. 2013-05-22. Polynomial Chaotic Inflation in Supergravity. https://doi.org/10.1088/1475-7516%2F2013%2F08%2F038

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