Effects of new physics in neutrino propagation

TL;DR

This paper investigates how potential violations of Lorentz invariance could affect high-energy neutrino fluxes, suggesting that superluminal neutrinos might become unstable and produce observable flux cut-offs.

Contribution

It introduces a model for neutrino propagation with Lorentz invariance violation and predicts flux cut-offs based on new physics parameters.

Findings

Superluminal neutrinos can become unstable, leading to flux suppression.

The flux cut-off location depends on the parameters of the Lorentz invariance violation.

Simple models can estimate the cut-off as a function of source distance and new physics parameters.

Abstract

In this work we consider the effects of Lorentz Invariance Violation over the observed flux of very high-energy neutrinos. For that, we study the neutrino propagation in a Modified Dispersion Relation scenario with a superluminal velocity. This makes the neutrino unstable and causes a cut-off in the flux of detected neutrinos. Using simple models, one can approximate the location of the cut-off as function of the parameters of new physics and the closest source.