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Decaying Dark Matter can explain the electron/positron excesses
Authors: Enrico Nardi, Francesco Sannino, Alessandro Strumia
arXiv:0811.4153v1 (hep-ph)
"On the other hand, this tension disappears if the PAMELA/ATIC results are explained by an unstable dark matter particle with the life-time of order 1026 seconds and the mass of order 2 TeV. The plot, taken from this
paper
, shows that the PAMELA/ATIC region safely satisfies the HESS and radio bounds, even for the NFW profile"