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arXiv · 1809.08610

Highly-boosted dark matter and cutoff for cosmic-ray neutrino through neutrino portal

Wen Yin
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Abstract

We study the cutoff for the cosmic-ray neutrino, set by the scattering with cosmic background neutrinos into dark sector particles through a neutrino portal interaction. We find that a large interaction rate is still viable, when the dark sector particles are mainly coupled to the $\tau-$neutrino, so that the neutrino mean free path can be reduced to be $O(10)~$Mpc over a wide energy range. If stable enough, the dark sector particle, into which most of the cosmic-ray neutrino energy is transferred, can travel across the Universe and reach the earth. The dark sector particle can carry the energy as large as $\O({\rm EeV})$ if originates from a cosmogenic neutrino.

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Wen Yin. 2018-09-23. Highly-boosted dark matter and cutoff for cosmic-ray neutrino through neutrino portal. https://doi.org/10.1051/epjconf%2F201920804003

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