Elsevier

Physics Letters B

Volume 777, 10 February 2018, Pages 270-274
Physics Letters B

Gravitino problem in inflation driven by inflaton-polonyi Kähler coupling

https://doi.org/10.1016/j.physletb.2017.12.038Get rights and content
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Abstract

We discuss the cosmological gravitino problem in inflation models in which the inflaton potential is constructed from Kähler potential rather than superpotential: a representative model is D3-induced geometric inflation. A critical ingredient in this type of models is the coupling of the inflaton and Polonyi (supersymmetry-breaking) field in the Kähler 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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