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Gravitino Dark Matter and Non-Gaussianity · Around

2009

Gravitino Dark Matter and Non-Gaussianity

Takahashi, Tomo, Yamaguchi, Masahide, Yokoyama, Jun'ichi et al.

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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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