Work

Gravitino problem in minimal supergravity inflation

Year: 2017

Type: article

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 after inflation or a serious gravitino problem.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2017.02.030

Authors: Fuminori Hasegawa, Kyohei Mukaida, Kazunori Nakayama, Takahiro Terada, Yusuke Yamada

Institutions: Institute for Cosmic Ray Research, The University of Tokyo, Kavli Institute for the Physics and Mathematics of the Universe, Korea Institute for Advanced Study, Stanford University

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond