Decaying gravitino dark matter and an upper bound on the gluino mass

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Hamaguchi, Koichi
Takahashi, Fuminobu
Yanagida, T. T.
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We show that, if decaying gravitino dark matter is responsible for the PAMELA and ATIC/PPB-BETS anomalies in the cosmic-ray electron and positron fluxes, both a reheating temperature and a gluino mass are constrained from above. In particular, the gluino mass is likely within the reach of LHC, if the observed baryon asymmetry is explained by thermal leptogenesis scenario.
Comment: 9 pages, 3 figures. v2: references added
Keywords
High Energy Physics - Phenomenology, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Theory
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