R-violating Decay of Wino Dark Matter and electron/positron Excesses in the PAMELA/Fermi Experiments

Details R-violating Decay of Wino Dark Matter and electron/positron Excesses in the PAMELA/Fermi Experiments R-violating Decay of Wino Dark Matter and electron/positron Excesses in the PAMELA/Fermi Experiments

2009-05-04

arxiv.org/abs/0905.0388v1

Phys.Lett.B680:485-488,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 4 figures

Scientific paper

10.1016/j.physletb.2009.09.049

We show that R-parity violating decay of Wino dark matter of mass \sim 3 TeV can naturally account for the flux and spectral shape of the cosmic-ray electrons and positrons observed by the PAMELA and Fermi satellites. To provide a theoretical basis for the scenario, we also present a model that trilinear R-parity breaking appears with a coefficient suppressed by powers of the gravitino mass, which naturally leads to the Wino lifetime of O(10^26) sec.

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