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We study a scenario that a U(1) hidden gaugino constitutes the dark matter inthe Universe and decays into a lepton and slepton pair through a mixing with aU(1)B-L gaugino. We find that the dark-matter decay can account for the recentPAMELA and ATIC anomalies in the cosmic-ray positrons and electrons without anoverproduction of antiprotons.

Decaying Hidden Gaugino as a Source of PAMELA/ATIC Anomalies