High energy cosmic rays from decaying dark matter

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We discuss the implications of the excess in the total electron plus positron flux and the positron fraction reported by the Fermi and PAMELA collaborations, respectively, for the scenario of decaying dark matter. We also discuss the constraints on this scenario from measurements of other cosmic ray species and the predictions for the diffuse gamma ray flux and the neutrino flux. In particular, we expect a sizable dipole-like anisotropy in the diffuse gamma-ray flux which may be observed by the Fermi-LAT in the near future.

Original languageEnglish
Pages (from-to)1088-1092
Number of pages5
JournalFortschritte der Physik
Issue number11-12
StatePublished - Nov 2011


  • Cosmic ray anomalies.
  • Dark matter decay


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