Gravitino problem in minimal supergravity inflation

Fuminori Hasegawa, Kyohei Mukaida, Kazunori Nakayama, Takahiro Terada*, Yusuke Yamada

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


We study non-thermal gravitino production in the minimal supergravity inflation. In this minimal model utilizing orthogonal nilpotent superfields, the particle spectrum includes only graviton, gravitino, inflaton, and goldstino. We find that a substantial fraction of the cosmic energy density can be transferred to the longitudinal gravitino due to non-trivial change of its sound speed. This implies either a breakdown of the effective theory after inflation or a serious gravitino problem.

Original languageEnglish
Pages (from-to)392-397
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - 2017 Apr 10
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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