Kinetic term anarchy for polynomial chaotic inflation

Kazunori Nakayama, Fuminobu Takahashi, Tsutomu T. Yanagida

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Abstract: We argue that there may arise a relatively flat inflaton potential over super-Planckian field values with an approximate shift symmetry, if the coefficients of the kinetic terms for many singlet scalars are subject to a certain random distribution. The inflation takes place along the flat direction with a super-Planckian length, whereas the other light directions can be stabilized by the Hubble-induced mass. The inflaton potential generically contains various shift-symmetry breaking terms, leading to a possibly large deviation of the predicted values of the spectral index and tensor-to-scalar ratio from those of the simple quadratic chaotic inflation. We revisit a polynomial chaotic inflation in supergravity as such.

Original languageEnglish
Article number14
Pages (from-to)1-14
Number of pages14
JournalJournal of High Energy Physics
Volume2014
Issue number9
DOIs
Publication statusPublished - 2014 Sep

Keywords

  • Cosmology of Theories beyond the SM
  • Global Symmetries
  • Supergravity Models

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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