Retrofitted gravity mediation without the gravitino-overproduction problem

Motoi Endo, Fuminobu Takahashi, T. T. Yanagida

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We propose a retrofitted gravity-mediation model which alleviates the gravitino overproduction from decays of an inflaton and a supersymmetry breaking field. In the model, we introduce an approximate U(1) symmetry under which the supersymmetry breaking field is charged, although it is broken by a mass term of messenger fields to generate gaugino masses of order the weak scale. In a low-scale inflation model, we find regions in which the gravitino-overproduction problem is avoided.

Original languageEnglish
Article number083508
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number8
Publication statusPublished - 2007 Oct 9


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