The gravitino problem in supersymmetric warm inflation
Juan C. Bueno Sánchez; Mar Bastero-Gil; Arjun Berera; Konstantinos Dimopoulos; Kazunori Kohri
Журнал:
Journal of Cosmology and Astroparticle Physics
Дата:
2011-03-01
Аннотация:
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.
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