DJ.8.05 — Searches for particle dark matter with H.E.S.S.

Date & Time

Aug 10th at 5:05 PM until 5:25 PM




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Author(s): Pierre Brun1

Institution(s): 1. CEA Saclay

P. Brun, on behalf of the H.E.S.S. collaboration
Probes of the matter budget of the universe at all scales indicate 84% of its mass is made of a new form of matter; this is the so-called dark matter problem. An appealing hypothesis is that it would be formed of new, yet undiscovered, stable particles of mass between a few GeV and hundreds of TeV. Having only weak interactions, hose would have been produced in the early hot phases of the universe, and their density would have been frozen at temperatures around 10^{15} K, 10^{-10} s after the big bang. The clustering of these particles would seed galaxy formation and their collisions within dense regions are expected to produce gamma rays with energies of the order of the above-mentioned mass. I will report here searches for dark matter particle collision-induced gamma rays with the H.E.S.S. array of ground-based gamma-ray telescopes. In the absence of convincing exotic signal, constraints on some parameters of the hypothesized dark matter particles will be presented.