Gravitino dark matter and non-Gaussianity

2009/05/31 by Tomo Takahashi, Masahide Yamaguchi, Jun’ichi Yokoyama +2
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Cosmic microwave background #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Gravitino #Non-Gaussianity #Particle physics #Physics #Quantum mechanics #Supergravity #Supersymmetry #astro-ph.CO #hep-ph #hep-th

paper · pdf · doi:10.1016/j.physletb.2009.06.007

published as Phys.Lett.B678:15-19,2009 · 12 pages, published in PLB

openalex publication_date 2009/06/11 · arxiv created 2009/07/17 · arxiv updated 2010/04/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

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