Consequences of Modified Cosmologies in DM abundance and PeV IceCube signals

Abstract

To explain the high-energy astrophysical neutrino flux with energies ∼ P eV recently observed by IceCube collaboration and the relic abundance of DM in the Universe, we consider the minimal 4-dimensional operator ∼ y αχ L Lα H χ. The cosmological background is assumed to evolve according to f (T ) cosmology, where T is the scalar torsion.