Orateur
Marco Taoso
(IPhT Saclay/CEA)
Description
A GeV gamma-ray excess has possibly been individuated in Fermi-LAT data from the Galactic Center and interpreted in terms of Dark Matter annihilations, either in hadronic or leptonic channels. In order to test this tantalizing interpretation, we address two issues: (i) we improve the computation of secondary emission from DM, confirming it to be very relevant for determining the DM spectrum in the leptonic channels, (ii) we consider the constraints from antiprotons on the DM hadronic channel, finding that the uncertainties on the propagation model and the solar modulation play a major role.
The limits that we obtain severely constrain the DM interpretation of the excess in the hadronic channel, for standard assumptions on the Galactic propagation parameters and solar modulation. However, they considerably relax if more conservative choices are adopted.
Auteur principal
Marco Taoso
(IPhT Saclay/CEA)
