Reheating processes after Starobinsky inflation in old-minimal supergravity

Takahiro Terada, Yuki Watanabe*, Yusuke Yamada, Jun’ichi Yokoyama

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Abstract: We study reheating processes and its cosmological consequences in the Starobinsky model embedded in the old-minimal supergravity. First, we consider minimal coupling between the gravity and matter sectors in the higher curvature theory, and transform it to the equivalent standard supergravity coupled to additional matter superfields. We then discuss characteristic decay modes of the inflaton and the reheating temperature TR. Considering a simple model of supersymmetry breaking sector, we estimate gravitino abundance from inflaton decay, and obtain limits on the masses of gravitino and supersymmetry breaking field. We find TR ≃ 1.0 × 109 GeV and the allowed range of gravitino mass as 104 GeV ≲ m3/2 ≲ 105 GeV, assuming anomaly-induced decay into the gauge sector as the dominant decay channel.

Original languageEnglish
Article number105
JournalJournal of High Energy Physics
Volume2015
Issue number2
DOIs
Publication statusPublished - 2015 Feb
Externally publishedYes

Keywords

  • Cosmology of Theories beyond the SM
  • Supergravity Models
  • Supersymmetry Breaking

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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