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Event Detail Information

Event Detail Information

Speaker Alexander Belikov (IAP Paris)
Date Oct 31, 2012
Time 12:00 pm  
Location 464 Loomis
Sponsor Department of Physics
Event type Seminar
Views 3701
In the paradigm of cold dark matter the dark matter particles can have masses from a few GeV up to a few tens of TeV and they are expected to contribute to a number of astrophysical and cosmological observables. 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. The spectra of both of gamma rays from the galactic center (Fermi+HESS) as well as the spectrum of cosmic ray electrons (Fermi+HESS) 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.