Interactions of Astrophysical Neutrinos with Dark Matter: A model building perspective

TL;DR

This paper investigates how high-energy astrophysical neutrinos might interact with dark matter during their journey to Earth, proposing a $Z'$-mediated model to explain potential flux suppression while considering various constraints.

Contribution

It introduces a $Z'$-mediated interaction model between neutrinos and dark matter, covering a wide mass range and addressing the challenges of model building under multiple constraints.

Findings

Proposed a $Z'$-mediated model for neutrino-dark matter interactions.

Demonstrated the difficulty of achieving significant neutrino flux suppression.

Analyzed constraints from cosmology, colliders, and electroweak precision tests.

Abstract

We explore the possibility that high energy astrophysical neutrinos can interact with the dark matter on their way to Earth. Keeping in mind that new physics might leave its signature at such energies, we have considered all possible topologies for effective interactions between neutrino and dark matter. Building models, that give rise to a significant flux suppression of astrophysical neutrinos at Earth, is rather difficult. We present a $Z^{\prime}$-mediated model in this context. Encompassing a large variety of models, a wide range of dark matter masses from $10^{-21}$ eV up to a TeV, this study aims at highlighting the challenges one encounters in such a model building endeavour after satisfying various cosmological constraints, collider search limits and electroweak precision measurements.