| Gravitino Dark Matter and Non-Gaussianity (2009) | |||||||||
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.. Comment: 12 pages, published in PLB | |||||||||
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