Inflaton decay in supergravity and gravitino problem

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


We have recently 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. Taking account of these processes, we derive constraints on both inflation models and supersymmetry breaking scenarios for avoiding overproduction of the gravitinos.

Original languageEnglish
Title of host publicationParticles, Strings, and Cosmology - 13th International Symposium on Particles, Strings, and Cosmology, PASCOS 2007
Number of pages4
Publication statusPublished - 2007 Dec 1
Externally publishedYes
Event13th International Symposium on Particles, Strings and Cosmology, PASCOS 2007 - London, United Kingdom
Duration: 2007 Jul 22007 Jul 7

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other13th International Symposium on Particles, Strings and Cosmology, PASCOS 2007
Country/TerritoryUnited Kingdom


  • Gravitino
  • Inflation
  • Reheating
  • Supergravity

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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