Gravitino Dark Matter and Non-Gaussianity

Details Gravitino Dark Matter and Non-Gaussianity Gravitino Dark Matter and Non-Gaussianity

2009-05-03

arxiv.org/abs/0905.0240v2

Phys.Lett.B678:15-19,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

12 pages, published in PLB

Scientific paper

10.1016/j.physletb.2009.06.007

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.

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