Tau neutrinos from ultracompact dark matter minihalos and constraints on the primordial curvature perturbations

Understand

The observations and research on the neutrinos provide a kind of indirect way of revealing the properties of dark matter particles.

• For the detection of muon neutrinos, the main issue is the large atmospheric background, which is caused by the interactions between the cosmic rays and atoms within the atmosphere.
• Compared with muon neutrinos, tau neutrinos have a smaller atmospheric background especially for the downward-going direction.
• Except for the classical neutrino sources, dark matter particles can also annihilate into the neutrinos and are the potential high energy astrophysical sources.