Prospects to verify a possible dark matter hint in cosmic antiprotons with antideuterons and antihelium

Nov 22, 2017
11 pages
Published in:
  • Phys.Rev.D 97 (2018) 10, 103011
  • Published: May 19, 2018
e-Print:
Report number:
  • TTK-17-42

Citations per year

20172019202120232024051015
Abstract: (APS)
Cosmic rays are an important tool to study dark matter (DM) annihilation in our Galaxy. Recently, a possible hint for dark matter annihilation was found in the antiproton spectrum measured by AMS-02, even though the result might be affected by theoretical uncertainties. A complementary way to test its dark matter interpretation would be the observation of low-energy antinuclei in cosmic rays. We determine the chances to observe antideuterons with GAPS and AMS-02 and the implications for the ongoing AMS-02 antihelium searches. We find that the corresponding antideuteron signal is within the GAPS and AMS-02 detection potential. If, more conservatively, the putative signal was considered as an upper limit on DM annihilation, our results would indicate the highest possible fluxes for antideuterons and antihelium compatible with current antiproton data.
Note:
  • 11 pages, 5 figures, matches published version
  • dark matter: annihilation
  • anti-p: spectrum
  • antideuteron
  • cosmic radiation
  • GAPS
  • conservation law
  • antinucleus
  • galaxy
  • AMS
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