Inflaton decay in supergravity

Motoi Endo, Fuminobu Takahashi, T. T. Yanagida

Research output: Contribution to journalArticlepeer-review

153 Citations (Scopus)

Abstract

We discuss inflaton decay in supergravity, taking account of the gravitational effects. It is shown that, if the inflaton has a nonzero vacuum expectation value, it generically couples to any matter fields that appear in the superpotential at the tree level, and to any gauge sectors through anomalies in the supergravity. Through these processes, the inflaton generically decays into the supersymmetry breaking sector, producing many gravitinos. The inflaton also directly decays into a pair of the gravitinos. We derive constraints on both inflation models and supersymmetry breaking scenarios for avoiding overproduction of the gravitinos. Furthermore, the inflaton naturally decays into the visible sector via the top Yukawa coupling and SU(3)C gauge interactions.

Original languageEnglish
Article number083509
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume76
Issue number8
DOIs
Publication statusPublished - 2007 Oct 12
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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