Sterile neutrinos with altered dispersion relations revisited

TL;DR

This paper examines sterile neutrino models with altered dispersion relations, finding that such models introduce tensions with global neutrino oscillation data, challenging their viability.

Contribution

It provides a comprehensive analysis of sterile neutrino models with modified dispersion relations and demonstrates their incompatibility with existing global data.

Findings

Altered dispersion relations introduce tensions with global data

Models fail to reconcile with experimental neutrino oscillation results

Standard sterile neutrino models are challenged by these findings

Abstract

In this paper we investigate neutrino oscillations with altered dispersion relations in the presence of sterile neutrinos. Modified dispersion relations represent an agnostic way to parameterize new physics. Models of this type have been suggested to explain global neutrino oscillation data, including deviations from the standard three-neutrino paradigm as observed by a few experiments. We show that, unfortunately, in this type of models new tensions arise turning them incompatible with global data.