Excess in diffusive gamma rays interpreted as a Dark Matter annihilation signal

par Dr Christian Sander (University of Hamburg)

lundi 14 mai 2007, 16:00 → 17:30 US/Central

Salle 101 (LAL)

Recently it was shown that the excess of diffuse Galactic gamma rays above 1 GeV could be interpreted as a Dark Matter annihilation signal. From the directional dependence a possible halo profile could be extracted as proven by reconstructing the peculiar shape of the rotation curve of the Miky Way. From the spectral shape of the excess it is possible to determine a range of the allowed WIMP mass. It will be shown, that the DM interpretation of the excess is compatible with the spectral shape of the extragalactic flux, which can be extracted from the EGRET data in a selfconsistent way. The limits on the Wimp mass can be used to test the supersymmetric parameter space. It is found that the EGRET excess combined with all electroweak constraints is fully consistent with the minimal mSUGRA model for scalars in the TeV range and gauginos below 500 GeV.

Slides sander_egret_lal07.pdf

Video sander_egret_CanM_sim.mpg