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arXiv · 1808.02486

Neutrinophilic Dark Matter in the epoch of IceCube and Fermi-LAT

Marco Chianese·Gennaro Miele·Stefano Morisi·Eduardo Peinado
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Abstract

The recent observation of the blazar TXS 0506+056 suggests the presence of a hard power-law component in the extraterrestrial TeV-PeV neutrino flux, in agreement with the IceCube analysis on the 8-year through-going muon neutrinos from the Northern Sky. This is slightly in tension with the soft power-law neutrino flux deduced by the IceCube 6-year High Energy Starting Events data. A possible solution to such a puzzle is assuming a two-component neutrino flux. In this paper, we focus on the case where, in addition to an astrophysical power-law, the second component is a pure neutrino line produced by decaying Dark Matter particles. We investigate how to realize a neutrinophilic decaying Dark Matter in an extension of the Standard Model. The main features of the model are: i) the requirement of a new symmetry like a global $U(1)$ charge; ii) the Dirac nature of active neutrinos; iii) a low-reheating temperature of the Universe of about 1 TeV. We perform a likelihood statistical analysis to fit the IceCube data according to the present Fermi-LAT gamma-rays constraints.

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Marco Chianese, Gennaro Miele, Stefano Morisi, Eduardo Peinado. 2018-11-13. Neutrinophilic Dark Matter in the epoch of IceCube and Fermi-LAT. https://doi.org/10.1088/1475-7516%2F2018%2F12%2F016

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