Closing the neutrinoless double beta decay window into violations of the equivalence principle and/or Lorentz invariance

TL;DR

This paper investigates the potential of neutrinoless double beta decay to reveal violations of Lorentz invariance and the equivalence principle in the neutrino sector, concluding it is not a useful probe for these phenomena.

Contribution

The study critically assesses the capability of neutrinoless double beta decay experiments to detect exotic violations, providing a negative result that refines future research directions.

Findings

Neutrinoless double beta decay cannot effectively probe Lorentz invariance violations.

The decay process does not offer useful insights into equivalence principle violations.

The analysis narrows the scope of experimental searches for exotic neutrino physics.

Abstract

We have examined Lorentz invariance and equivalence principle violations in the neutrino sector as manifested in neutrinoless double beta decay. We conclude that this rare decay cannot provide a useful view of these exotic processes.