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Gravitino dark matter and non-Gaussianity |
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| Authors: | Tomo Takahashi Masahide Yamaguchi Jun'ichi Yokoyama Shuichiro Yokoyama |
| Affiliation: | 1. Department of Physics, Saga University, Saga 840-8502, Japan;2. Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara 229-8558, Japan;3. Research Center for the Early Universe (RESCEU), Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan;4. Institute for the Physics and Mathematics of the Universe (IPMU), The University of Tokyo, Kashiwa, Chiba 277-8568, Japan;5. Department of Physics and Astrophysics, Nagoya University, Aichi 464-8602, Japan |
| 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 in this framework. We also briefly discuss the case with the curvaton mechanism and some other possible dark matter scenarios. |
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