Does the DM background affect the propagation of extragalactic neutrinos?

Abstract

Neutrinos ([Formula: see text]) are produced in practically all extragalactic astrophysical processes. They can travel enormous distances from remote parts of the universe at velocities near the speed of light. The interaction of neutrinos with both galactic and extragalactic particles may shed light on the composition of these particles. Dark matter (DM) is perhaps the most favored candidate for such intra- and extragalactic media. In this paper, we study the interaction of neutrinos with cold leptonic DM at the relativistic level. We have calculated cross-sections for the [Formula: see text]–DM interactions by adopting different models for the DM distribution, in order to test DM properties.