Gravitino Problem in Minimal Supergravity Inflation
High Energy Physics - Phenomenology
2017-02-23 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
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.
Cite
@article{arxiv.1701.03106,
title = {Gravitino Problem in Minimal Supergravity Inflation},
author = {Fuminori Hasegawa and Kyohei Mukaida and Kazunori Nakayama and Takahiro Terada and Yusuke Yamada},
journal= {arXiv preprint arXiv:1701.03106},
year = {2017}
}
Comments
18 pages; published version, references added, minor corrections