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Updated: May 24, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Gravitational particle production in massive chaotic inflation and the moduli problem
Jaume de Haro1, Emilio Elizalde
1Departament de Matemàtica Aplicada I, Universitat Politècnica de Catalunya, Barcelona, Spain. jaime.haro@upc.edu
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.
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