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arXiv · 1709.01246

Gravitino Problem in Inflation Driven by Inflaton-Polonyi K\"ahler Coupling

Fuminori Hasegawa·Kazunori Nakayama·Takahiro Terada·Yusuke Yamada
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Abstract

We discuss the cosmological gravitino problem in inflation models in which the inflaton potential is constructed from K\"ahler potential rather than superpotential: a representative model is $\overline{\text{D}3}$-induced geometric inflation. A critical ingredient in this type of models is the coupling of the inflaton and Polonyi (supersymmetry-breaking) field in the K\"ahler potential, which is needed to build the inflaton potential. We point out the same coupling let the inflaton dominantly decay into a pair of inflatino and gravitino causing the gravitino problem. We propose some possible solutions to this problem.

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Fuminori Hasegawa, Kazunori Nakayama, Takahiro Terada, Yusuke Yamada. 2017-09-05. Gravitino Problem in Inflation Driven by Inflaton-Polonyi K\"ahler Coupling. https://doi.org/10.1016/j.physletb.2017.12.038

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