AMS-02 Antiprotons from Annihilating or Decaying Dark Matter
High Energy Physics - Phenomenology
2015-04-23 v1 Cosmology and Nongalactic Astrophysics
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.
Cite
@article{arxiv.1504.05937,
title = {AMS-02 Antiprotons from Annihilating or Decaying Dark Matter},
author = {Koichi Hamaguchi and Takeo Moroi and Kazunori Nakayama},
journal= {arXiv preprint arXiv:1504.05937},
year = {2015}
}
Comments
12 pages, 3 figures