Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-09-25
AIP Conf.Proc.1178:1-7,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
Proceedings of DSU09 "The Dark Side of the Universe", 1-5 June 2009, Melbourne, 7 pages, 2 figures
Scientific paper
10.1063/1.3264551
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.
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