High-Energy Physics & RIKEN Theory Seminar

Dark Matter particles accumulate in the center of the Earth and the Sun and annihilate, yielding fluxes of high energy neutrinos (~tens of GeV)which will be hopefully detected in the Neutrino Telescopes (Antares, IceCube, a large Cerenkov detector...). The neutrino fluxes carry precious nformation on the main properties of DM (its abundance, its mass and its annihilation branching ratios), opening windows on its
nature and on the theory that explains it. We compute precisely the expected neutrino yield, their expected
angular distribution and, especially, the neutrino spectra, which are more free from astrophysical uncertainties. We develop the appropriate formalism to follow the neutrino production, the evolution of the fluxes in the matter of the Earth and the Sun (determined by flavor oscillations, absorptions/scatterings and tau regeneration) and in the
vacuum and finally the detection signatures. In particular, we show how neutrino flavor oscillations have the effect of greatly enhancing or reducing the signal in a detector, depending on the dominant annihilation branching ratio, and we focus on potentially powerful signatures that have not been explored so far.