Gravitational particle production in massive chaotic inflation and the moduli problem

Jaume De Haro, Emilio Elizalde

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    Abstract

    Particle production from vacuum fluctuations during inflation is briefly revisited. The moduli problem occurring with light particles produced at the end of inflation is addressed, namely, the fact that some results are in disagreement with nucleosynthesis constrains. A universal solution to this problem is found which leads to reasonable reheating temperatures in all cases. It invokes the assumption that, immediately after inflation, the moduli evolve like nonrelativistic matter. The assumption is justified in the context of massive chaotic inflation where, at the end of inflation, the Universe evolves as if it were matter dominated. © 2012 American Physical Society.
    Original languageEnglish
    Article number061303
    JournalPhysical Review Letters
    Volume108
    Issue number6
    DOIs
    Publication statusPublished - 10 Feb 2012

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