Gravitino problem in inflation driven by inflaton-Polonyi Kähler coupling

DOI10.1016/J.PHYSLETB.2017.12.038zbMATH Open1411.83152arXiv1709.01246OpenAlexW2780169274MaRDI QIDQ1738387

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Publication date: 18 April 2019

Published in: (Search for Journal in Brave)

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 $overlineextD3$-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.

Full work available at URL: https://arxiv.org/abs/1709.01246

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