Heavy gravitino in hybrid inflation

Masahiro Kawasaki, Naoya Kitajima, Kazunori Nakayama, Tsutomu T. Yanagida

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


It is known that supersymmetric hybrid inflation model may require severe tunings on the initial condition for large gravitino mass of order 100-1000 TeV due to the constant term in the superpotential. We propose a modified hybrid inflation model, where the constant term is suppressed during inflation and generated after inflation by replacing a constant term with dynamical field. In this modified model, successful inflation consistent with large gravitino mass takes place without severe tunings on the initial condition. Constraint from cosmic strings is also relaxed.

Original languageEnglish
Article number037
JournalJournal of Cosmology and Astroparticle Physics
Issue number6
Publication statusPublished - 2013 Jun
Externally publishedYes


  • Cosmology of theories beyond the SM
  • Inflation
  • Particle physics - cosmology connection
  • Supersymmetry and cosmology

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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