Quantum-Gravity Decoherence Effects in Neutrino Oscillations: Expected Constraints from CNGS and J-PARC

TL;DR

This paper explores how neutrino oscillation experiments like CNGS and J-PARC can set constraints on quantum-gravity induced decoherence, using model-independent parameterizations to analyze expected data.

Contribution

It introduces a method to constrain quantum-gravity decoherence effects in neutrino oscillations through expected experimental data from long baseline experiments.

Findings

Bounds on quantum-gravity decoherence parameters are derived.

Neutrino detection rates are affected by decoherence models.

Model-independent parameterizations enable broad applicability of results.

Abstract

Quantum decoherence, the evolution of pure states into mixed states, may be a feature of quantum-gravity models. In most cases, such models lead to fewer neutrinos of all active flavours being detected in a long baseline experiment as compared to three-flavour standard neutrino oscillations. We discuss the potential of the CNGS and J-PARC beams in constraining models of quantum-gravity induced decoherence using neutrino oscillations as a probe. We use as much as possible model-independent parameterizations, even though they are motivated by specific microscopic models, for fits to the expected experimental data which yield bounds on quantum-gravity decoherence parameters.