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Decaying Hidden Gaugino as a Source of PAMELA/ATIC Anomalies

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

preprint2009arXivOpen access
Satoshi ShiraiFuminobu TakahashiT. T. Yanagida
astro-ph.COhep-ph
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Satoshi ShiraiFuminobu TakahashiT. T. Yanagida

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