Neutrino mixing and CP-violation

TL;DR

This paper discusses the potential to measure neutrino mixing angles and CP-violation phases at neutrino factories under scenarios with three active neutrinos and with an additional sterile neutrino, proposing experimental tests for CP-violation.

Contribution

It introduces new approximations for scenarios with sterile neutrinos and identifies optimal experimental signatures for CP-violation detection.

Findings

Wrong sign muons are key for CP-violation tests in three-neutrino scenarios.

Tau leptons are effective indicators in sterile neutrino scenarios.

Developed mass dominance approximations for complex neutrino models.

Abstract

The prospects of measuring the leptonic angles and CP-odd phases at a neutrino factory are discussed in two scenarios: 1) three active neutrinos as indicated by the present ensemble of atmospheric plus solar data; 2) three active plus one sterile neutrino when the LSND signal is also taken into account. For the latter we develop one and two mass dominance approximations. The appearance of wrong sign muons in long baseline experiments and tau leptons in short baseline ones provides the best tests of CP-violation in scenarios 1) and 2), respectively.