Gravitino Dark Matter and Non-Gaussianity
Cosmology and Nongalactic Astrophysics
2010-04-28 v2 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We investigate density fluctuations in a scenario with gravitino dark matter in the framework of modulated reheating, which is known to generate large non-Gaussianity. We show that gravitino dark matter is disfavored if primordial fluctuations have large local-type non-Gaussianity in this framework. We also briefly discuss the case with the curvaton mechanism and some other possible dark matter scenarios.
Keywords
Cite
@article{arxiv.0905.0240,
title = {Gravitino Dark Matter and Non-Gaussianity},
author = {Tomo Takahashi and Masahide Yamaguchi and Jun'ichi Yokoyama and Shuichiro Yokoyama},
journal= {arXiv preprint arXiv:0905.0240},
year = {2010}
}
Comments
12 pages, published in PLB