Polynomial Chaotic Inflation in Supergravity Revisited
High Energy Physics - Phenomenology
2015-06-22 v1 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
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.
Keywords
Cite
@article{arxiv.1407.7082,
title = {Polynomial Chaotic Inflation in Supergravity Revisited},
author = {Kazunori Nakayama and Fuminobu Takahashi and Tsutomu T. Yanagida},
journal= {arXiv preprint arXiv:1407.7082},
year = {2015}
}
Comments
13 pages, 6 figures