Moduli Decays and Gravitinos

Details Moduli Decays and Gravitinos Moduli Decays and Gravitinos

2006-04-17

arxiv.org/abs/hep-ph/0604140v3

Phys.Rev. D73 (2006) 123518

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, version to appear in Physical Review D

Scientific paper

10.1103/PhysRevD.73.123518

One proposed solution of the moduli problem of string cosmology requires that the moduli are quite heavy, their decays reheating the universe to temperatures above the scale of nucleosynthesis. In many of these scenarios, the moduli are approximately supersymmetric; it is then crucial that the decays to gravitinos are helicity suppressed. In this paper, we discuss situations where these decays are, and are not, suppressed. We also comment on a possible gravitino problem from inflaton decay.

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