Dark matter constraints from antiprotons in the light of AMS-02

Alessandro Cuoco, RWTH Aachen

I will discuss the implication for dark matter (DM) indirect searches of the recent precise measurements of cosmic-ray (CR) antiprotons from AMS-02. With respect to previous works we use a new updated CR propagation model consistent with the AMS-02 data. Furthermore, we fit at the same time, in a self-consistent way, both DM and the propagation parameters. We find a significant (4.5 sigma) indication of a DM signal for DM masses near 80 GeV, which, interestingly, is also compatible with the similar excess present in the Galactic center  in  gamma rays. Possible systematic effects will be also discussed. In terms of DM exclusion limits, we find stringent constraints a factor of 4-5 stronger than limits from gamma-ray observations of dwarf galaxies.

(The slides will be available here)

Weekly Theory Seminar, and also part of the seminar series of the Strategic Dark Matter Initiative. Note the time!

Published Jan. 4, 2017 5:31 PM - Last modified Jan. 4, 2017 5:31 PM