Anomaly-induced inflaton decay and gravitino-overproduction problem

Motoi Endo, Fuminobu Takahashi, T. T. Yanagida

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)


We point out that the inflaton spontaneously decays into any gauge bosons and gauginos via the super-Weyl, Kähler and sigma-model anomalies in supergravity, once the inflaton acquires a non-vanishing vacuum expectation value. In particular, in the dynamical supersymmetry breaking scenarios, the inflaton necessarily decays into the supersymmetry breaking sector, if the inflaton mass is larger than the dynamical scale. This generically causes the overproduction of the gravitinos, which severely constrains the inflation models.

Original languageEnglish
Pages (from-to)236-240
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number5
Publication statusPublished - 2008 Jan 10
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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