The Gravitino-Overproduction Problem in Inflaton Decay
نویسندگان
چکیده
We show that the gravitino-overproduction problem is prevalent among inflation models in supergravity. An inflaton field generically acquires (effective) non-vanishing auxiliary field, if the Kähler potential is non-minimal. The inflaton field then decays into a pair of the gravitinos, thereby severely constraining many of the inflation models especially in the case of the gravity-mediated SUSY breaking.
منابع مشابه
Gravitino Overproduction in Inflaton Decay
Most of the inflation models end up with non-vanishing vacuum expectation values of the inflaton fields φ in the true vacuum, which induce, in general, nonvanishing auxiliary field Gφ for the inflaton potential in supergravity. We show that the presence of nonzero Gφ gives rise to inflaton decay into a pair of the gravitinos and are thereby severely constrained by cosmology especially if the gr...
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