Hybrid inflation in high-scale supersymmetry

Tetsutaro Higaki, Kwang Sik Jeong, Fuminobu Takahashi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


In hybrid inflation, the inflaton generically has a tadpole due to gravitational effects in supergravity, which significantly changes the inflaton dynamics in high-scale supersymmetry. We point out that the tadpole can be cancelled if there is a supersymmetry breaking singlet with gravitational couplings, and in particular, the cancellation is automatic in no-scale supergravity. We consider the LARGE volume scenario as a concrete example and discuss the compatibility between the hybrid inflation and the moduli stabilization. We also point out that the dark radiation generated by the overall volume modulus decay naturally relaxes a tension between the observed spectral index and the prediction of the hybrid inflation.

Original languageEnglish
Article number111
JournalJournal of High Energy Physics
Issue number12
Publication statusPublished - 2012
Externally publishedYes


  • Cosmology of Theories beyond the SM
  • Supergravity Models
  • Superstring Vacua

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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