Neutrino Oscillation Observables from Mass Matrix Structure

TL;DR

This paper develops a systematic method to connect complex neutrino mass matrix textures with experimental observables, highlighting how future measurements can constrain these textures and emphasizing the importance of precision in measuring the CP phase.

Contribution

It introduces a comprehensive procedure linking neutrino mass matrix textures to observables, considering various mixing scenarios and phase averaging, to guide future experimental efforts.

Findings

Textures produce diverse observable distributions.

Large leptonic CP violation is possible.

Future measurements of delta_CP are crucial.

Abstract

We present a systematic procedure to establish a connection between complex neutrino mass matrix textures and experimental observables, including the Dirac CP phase. In addition, we illustrate how future experimental measurements affect the selection of textures in the (theta_13,delta_CP)-plane. For the mixing angles, we use generic assumptions motivated by quark-lepton complementarity. We allow for any combination between U_l and U_nu, as well as we average over all present complex phases. We find that individual textures lead to very different distributions of the observables, such as to large or small leptonic CP violation. In addition, we find that the extended quark-lepton complementarity approach motivates future precision measurements of delta_CP at the level of theta_C \simeq 11 degrees.