TH Cosmo Coffee

Probing light dark matter and the cosmic neutrino background with cosmic rays

by Gonzalo Herrera (TUM, MPP)

4/2-011 - TH common room (CERN)

4/2-011 - TH common room


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Supermassive black holes at the center of galaxies may accelerate cosmic rays to very high energies, yielding a flux of high-energy neutrinos and gamma-rays observable on Earth. The dark matter in the vicinity of supermassive black holes may scatter off protons, electrons, neutrinos and photons, perhaps cooling them too fast. Furthermore, a fraction of the dark matter and the cosmic neutrino background in these environments may be boosted to larger energies via scatterings with cosmic rays, yielding a flux directly detectable at Earth-based experiments. I will discuss all these phenomenological signatures in some detail, showing that they allow to probe new regions of the parameter space of light dark matter and relic neutrino overdensity.