2014/07/26 by Kazunori Nakayama, Fuminobu Takahashi, Tsutomu T. Yanagida
Earth and Planetary Sciences · Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Chaotic #Computer science #Cosmology and Gravitation Theories #Eternal inflation #Geometry #Geophysics and Gravity Measurements #Inflation (cosmology) #Inflaton #Mathematical analysis #Mathematical physics #Mathematics #Physics #Planck #Polynomial #Quantum mechanics #Scalar (mathematics) #Spectral index #Spectral line #Supergravity #Supersymmetry #Theoretical physics #astro-ph.CO #hep-ph #hep-th
paper · pdf · doi:10.1016/j.physletb.2014.08.043
13 pages, 6 figures
arxiv created 2014/07/26 · openalex publication_date 2014/08/22 · arxiv updated 2015/06/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.