Hybrid inflation in high-scale supersymmetry

Tetsutaro Higaki, Kwang Sik Jeong, Fuminobu Takahashi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

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
Volume2012
Issue number12
DOIs
Publication statusPublished - 2012
Externally publishedYes

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supergravity
supersymmetry
gravitational effects
cancellation
compatibility
stabilization
decay
radiation
predictions

Keywords

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

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Hybrid inflation in high-scale supersymmetry. / Higaki, Tetsutaro; Jeong, Kwang Sik; Takahashi, Fuminobu.

In: Journal of High Energy Physics, Vol. 2012, No. 12, 111, 2012.

Research output: Contribution to journalArticle

Higaki, Tetsutaro ; Jeong, Kwang Sik ; Takahashi, Fuminobu. / Hybrid inflation in high-scale supersymmetry. In: Journal of High Energy Physics. 2012 ; Vol. 2012, No. 12.
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