The gravitino problem in supersymmetric warm inflation
- Departamento de Física Atómica, Molecular y Nuclear, Universidad Complutense de Madrid, 28040 Madrid (Spain)
- Departamento de Física Teórica y del Cosmos, Universidad de Granada, Granada-18071 (Spain)
- SUPA, School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom)
- Physics Department, Lancaster University, Lancaster LA1 4YB (United Kingdom)
The warm inflation paradigm considers the continuous production of radiation during inflation due to dissipative effects. In its strong dissipation limit, warm inflation gives way to a radiation dominated Universe. High scale inflation then yields a high reheating temperature, which then poses a severe gravitino overproduction problem for the supersymmetric realisations of warm inflation. In this paper we show that, in a certain class of supersymmetric models, the dissipative dynamics of the inflaton is such that the field can avoid its complete decay after inflation. In some cases, the residual energy density stored in the inflaton field oscillations may come to dominate over the radiation bath at a later epoch. If the inflaton field finally decays much later than the onset of this matter dominated phase, the entropy produced from its decay may be sufficient to counteract the excess of gravitinos produced during the last stages of warm inflation.
- OSTI ID:
- 22275495
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 03 Vol. 2011; ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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