AMS-02 Antiprotons from Annihilating or Decaying Dark Matter
arXiv:1504.05937
Abstract
Recently the AMS-02 experiment reported an excess of cosmic ray antiprotons over the expected astrophysical background. We interpret the excess as a signal from annihilating or decaying dark matter and find that the observed spectrum is well fitted by adding contributions from the annihilation or decay of dark matter with mass of O(TeV) or larger. Interestingly, Wino dark matter with mass of around 3 TeV, whose thermal relic abundance is consistent with present dark matter abundance, can explain the antiproton excess. We also discuss the implications for the decaying gravitino dark matter with R-parity violation.
arXiv comment12 pages, 3 figures
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- Chiral Dark Sector
- Weakly-Interacting Massive Particles in Non-supersymmetric SO(10) Grand Unified Models
- Dark Matter with multi-annihilation channels and AMS-02 positron excess and antiproton
- Bottom-Tau Unification in Supersymmetric Model with Anomaly-Mediation