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

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.

preprint2009arXivOpen access
Koichi HamaguchiFuminobu TakahashiT. T. Yanagida
astro-ph.COhep-phastro-ph.HEhep-th
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Koichi HamaguchiFuminobu TakahashiT. T. Yanagida

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