The $\mu \nu$SSM and gravitino dark matter

Abstract

We consider the phenomenological implications of gravitino dark matter in the context of the $\mu \nu$SSM. The latter is an R-parity breaking model which provides a solution to the $\mu$-problem of the MSSM and explains the origin of neutrino masses by simply using right-handed neutrino superfields. In particular, we analyze the prospects for detecting gamma rays from decaying gravitinos. Gravitino masses larger than 20 GeV are disfavored by the isotropic diffuse photon background measurements, but a gravitino with a mass range between $0.1-20$ GeV gives rise to a signal that might easily be observed by the FERMI satellite. Through this kind of analysis important regions of the parameter space of the $\mu \nu$SSM can be checked.

Proceedings of DSU09 "The Dark Side of the Universe", 1-5 June 2009, Melbourne, 7 pages, 2 figures

References in corpus (7)

• Gamma Ray Spectrum from Gravitino Dark Matter Decay
• High Energy Cosmic Rays from the Decay of Gravitino Dark Matter
• Analysis of the parameter space and spectrum of the $\mu \nu$SSM
• Gamma-ray detection from gravitino dark matter decay in the $\mu \nu$SSM
• Neutrino Physics and Spontaneous CP Violation in the $\mu \nu$SSM
• Circumscribing Late Dark Matter Decays Model Independently
• Radiative gravitino decays from R-parity violation