Signals of CPT Violation and Non-Locality in Future Neutrino Oscillation Experiments

TL;DR

This paper explores how future neutrino experiments could detect CPT violation and non-locality by comparing neutrino and anti-neutrino oscillation parameters, using advanced facilities like Neutrino Factories and beta-Beams.

Contribution

It updates sensitivities of neutrino experiments to measure neutrino parameters and proposes methods to detect CPT violation through differences in neutrino and anti-neutrino mass matrices.

Findings

Neutrino Factory sensitivities to atmospheric parameters are improved.

Beta-Beam and reactor experiments can precisely measure solar parameters.

Detecting differences in neutrino and anti-neutrino parameters would indicate CPT violation.

Abstract

We investigate the sensitivities of future neutrino oscillation experiments for measuring the neutrino mass squared differences and leptonic mixing angles independently with neutrinos and anti-neutrinos. We update the expected sensitivities of Neutrino Factories to the "atmospheric" (anti-)neutrino parameters using an optimized setup. A dedicated beta-Beam facility, in combination with a SPMIN reactor experiment, could give excellent sensitivities also to the "solar" parameters, for neutrinos and anti-neutrinos respectively. A signal of a different mass matrix for neutrinos and anti-neutrinos would imply CPT violation and non-locality of the underlying particle theory.