CP and T violation in long baseline experiments with low energy neutrino from muon storage ring

TL;DR

This paper explores the potential to observe CP-violation effects in neutrino oscillations using low-energy neutrino beams from muon storage rings over long baselines, highlighting the experimental feasibility and advantages.

Contribution

It proposes a specific experimental setup with low-energy neutrinos and long baselines to effectively detect CP-violation effects, addressing matter effect interference.

Findings

Over 10% CP-violation effect detectable within current experimental bounds

Using initial nu_e beam avoids destructive matter and CP effects

Optimal energy and baseline range identified for statistical significance

Abstract

Stimulated by the idea of PRISM, a very high intensity muon ring with rather low energy, we consider possibilities of observing CP-violation effects in neutrino oscillation experiments. More than 10% of CP-violation effect can be seen within the experimentally allowed region. Destructive sum of matter effect and CP-violation effect can be avoided with use of initial nu_e beam. We finally show that the experiment with (a few) x 100 MeV of neutrino energy and (a few) x 100 km of baseline length, which is considered in this paper, is particularly suitable for a search of CP violation in view of statistical error.