Jun 23 – 28, 2014
Europe/Zurich timezone

Updated antiproton, positron and radio limits on light dark matter

Jun 26, 2014, 3:15 PM
Room 5 (Tuschinski Theatre)

Room 5

Tuschinski Theatre

Gamma-Ray Astrophysics Gamma-Ray Astrophysics


Martin Vollmann


In this brief presentation, I will discuss how cosmic-ray and radio observations impose stringent constraints on dark matter (DM) candidates with masses in the ~1-50 GeV range. We find strong bounds on DM annihilating into light leptons, or democratically into all leptons from cosmic ray positron data, while complementarily, cosmic ray antiproton and radio data show considerable tension with DM annihilation into any combination of quark final states and tau lepton pairs respectively. Taken together, these bounds present a significant challenge for a DM interpretation of the GeV excess in gamma rays that has been observed in the inner Galaxy.

Presentation materials