Systematic search for successful lepton mixing patterns with nonzero theta_13

TL;DR

This paper systematically searches for simple, viable lepton mixing patterns with nonzero theta_13, identifying numerous patterns consistent with current neutrino data and analyzing their stability under radiative corrections.

Contribution

It introduces a comprehensive method to identify lepton mixing patterns with rotation angles as simple fractions of pi, expanding the set of viable models consistent with experimental data.

Findings

Twenty mixing patterns fit current data in CP conserving case.

Fifteen mixing patterns are compatible with data in maximal CP violation case.

Radiative corrections to these patterns are quantitatively analyzed.

Abstract

We perform a systematic search for simple but viable lepton mixing patterns. Our main criterion is that the mixing matrix can be parameterized by three rotation angles, which are simple fractions of pi. These simple rotation angles possess exact expressions for their sines and cosines, and often arise in the flavor symmetry models. All possible parameterizations of the mixing matrix are taken into account. In total, twenty successful mixing patterns are found to be consistent with the latest neutrino oscillation data (including the recent T2K results) in the CP conserving case, whereas fifteen mixing patterns are allowed in the maximal CP violating case. Potential radiative corrections to the constant mixing patterns are also calculated by solving the renormalization group equations.