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arXiv · 1701.03106

Gravitino Problem in Minimal Supergravity Inflation

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

We study non-thermal gravitino production in the minimal supergravity inflation. In this minimal model utilizing orthogonal nilpotent superfields, the particle spectrum includes only graviton, gravitino, inflaton, and goldstino. We find that a substantial fraction of the cosmic energy density can be transferred to the longitudinal gravitino due to non-trivial change of its sound speed. This implies either a breakdown of the effective theory during reheating or a serious gravitino problem.

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Fuminori Hasegawa, Kyohei Mukaida, Kazunori Nakayama, Takahiro Terada, Yusuke Yamada. 2017-02-22. Gravitino Problem in Minimal Supergravity Inflation. https://doi.org/10.1016/j.physletb.2017.02.030

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