Moduli Decays and Gravitinos

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 decay...

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Bibliographic Details
Published inarXiv.org
Main Authors Dine, Michael, Kitano, Ryuichiro, Morisse, Alexander, Shirman, Yuri
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 24.05.2006
Subjects
Cosmology
Decay
Gravitinos
Heating
Helicity
Nuclear fusion
Supersymmetry
Universe
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0604140