T-violation search with very long baseline neutrino oscillation experiments

TL;DR

This paper explores the potential to observe T-violation in very long baseline neutrino oscillation experiments using low energy neutrinos, highlighting matter effects that enhance the detectability of T-violation.

Contribution

It demonstrates that matter effects can amplify T-violation signals in long baseline experiments, especially when the first-second generation mixing angle is small.

Findings

Matter effects modify the first-second generation mixing angle.

Resonance can maximize the effective mixing, aiding T-violation detection.

Implications for future long baseline neutrino experiments.

Abstract

We consider possibilities of observing T-violation effects in neutrino oscillation experiments with very long baseline (~ 10000 km) using low energy neutrino (~ several hundreds MeV). We show that the matter effect effectively changes only the first-second generation mixing angle, respecting solar neutrino deficits and atmospheric neutrino anomalies. The effective mixing of the first-second generation in the Earth grows up to maximum by resonance. This effect enables one to search T violation in case the first-second mixing angle is small. We discuss its implications to the observations of T-violation effects in long baseline experiments.