Gravitino problem in inflation driven by inflaton-polonyi Kähler coupling

Fuminori Hasegawa, Kazunori Nakayama, Takahiro Terada, Yusuke Yamada

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)270-274
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - 2018 Feb 10


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