Neutrino Dispersion Relations from a Dark Energy Model

TL;DR

This paper explores how a scalar field coupled to neutrinos in a dark energy model causes environment-dependent neutrino velocities and Lorentz violation, with implications for terrestrial and interstellar neutrino dispersion relations.

Contribution

It introduces a model where neutrino velocities depend on the environment due to coupling with a scalar field, linking dark energy theories to neutrino physics.

Findings

Terrestrial neutrino dispersion relations differ from interstellar ones.

Neutrino velocities are environment-dependent due to scalar coupling.

Lorentz violation occurs in the neutrino sector within this model.

Abstract

We consider a model in which the neutrino is kinetically coupled to a scalar field and study its implications for environmentally dependent neutrino velocities. Following the usual effective field theory logic, this coupling is expected to arise in neutrino dark energy models. It leads to a Lorentz violation in the neutrino sector. The coupling of the scalar field to the stress tensor of the Earth yields terrestrial neutrino dispersion relations distinct from those in interstellar space.