Four-Neutrino Mixing and Long-Baseline Experiments

TL;DR

This paper analyzes four-neutrino mixing schemes compatible with existing data, exploring their implications for long-baseline experiments and proposing methods to detect CP violation through comparative measurements.

Contribution

It identifies allowed parameter ranges for four-neutrino models and suggests a novel approach to observe CP-violating phases using long- and short-baseline experiment comparisons.

Findings

Allowed mixing parameter ranges are established.

Potential to detect CP violation via probability comparisons.

Implications for future long-baseline neutrino experiments.

Abstract

We consider the two four-neutrino schemes that are compatible with all neutrino oscillation data. We present the range of the corresponding mixing parameters allowed by the results of neutrino oscillation experiments. We discuss the implications for long-baseline experiments and we suggest the possibility to reveal the presence of CP-violating phases through a comparison of the oscillation probability measured in long-baseline experiments with the corresponding average oscillation probability measured in short-baseline experiments.