# Consequences of Modified Cosmologies in DM abundance and PeV IceCube signals

## TL;DR

This paper explores how modified cosmological models, specifically $f(T)$ cosmology, impact dark matter abundance and high-energy neutrino signals observed by IceCube, using a minimal operator framework.

## Contribution

It introduces the effects of $f(T)$ cosmology on dark matter relic density and PeV neutrino flux, providing a novel connection between modified gravity and astrophysical observations.

## Key findings

- Modified cosmology alters dark matter abundance predictions.
- Impacts on PeV neutrino flux consistent with IceCube data.
- Highlights the importance of cosmological models in particle astrophysics.

## Abstract

To explain the high-energy astrophysical neutrino flux with energies $\sim PeV$ recently observed by IceCube collaboration and the relic abundance of DM in the Universe, we consider the minimal 4-dimensional operator $\sim y_{\alpha \chi}\overline{{L_{L_{\alpha}}}}\, H\, \chi$. The cosmological background is assumed to evolve according to $f({\cal T})$ cosmology, where ${\cal T}$ is the scalar torsion.