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Theory Seminar (High Energy/Cosmology)
Indirect detection of dark matter at GeV and TeV scales
Date: Tuesday, October 30th
Time: 4:00 pm
Place: 5280 Chamberlin
Speaker: Alexander Belikov, Institut d'Astrophysics, Paris
Abstract: In my talk I will revise the recent interpretations of the isotropic gamma-ray and radio backgrounds, unidentified gamma-ray sources and BBN abundances of light elements in terms of GeV scale dark matter. In the second part of the talk I will focus on multi-TeV dark matter in the perspective of gamma-rays from the galactic center and cosmic ray electrons and positrons in Fermi+HESS data. The spectra of both of gamma rays from the galactic center as well as the spectrum of cosmic ray electrons exhibit a cutoff at TeV energies that can be interpreted as a signature of annihilating dark matter. I present the updated constraints in the parameter space of thermal cross-section vs. dark matter mass and study the best fits to the data in the parameter space defined by the branching ratio to a particular annihilation channel and the mass of the dark matter particle.
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