Slow and Safe Gravitinos
Giovedì 16 Dicembre 2021
17:00
Online
Abstract
The phenomenology of gravitinos has been the object of many studies in Cosmology.
After a brief overview of this subject, we will discuss a recent claim that gravitinos with vanishing sound speed are overproduced in the early Universe. We shall show that this overproduction does not occur in models with unconstrained superfields, but that it takes place only for specific choices of the Kähler and the superpotential, and for specific superfield constraints. We comment on other potential problems associated with this class of models.
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