Large theta_13 from a model with broken L_e-L_mu-L_tau symmetry

TL;DR

This paper proposes a supersymmetric model with broken L_e-L_mu-L_tau symmetry to explain the large observed neutrino mixing angle theta_13, attributing deviations mainly to the charged lepton sector.

Contribution

It introduces a novel SUSY model with a specific charged lepton mass matrix pattern that accounts for recent neutrino oscillation data, including a large theta_13.

Findings

Model successfully explains large theta_13

Charged lepton sector deviations are key

Compatible with current neutrino data

Abstract

Recent data in the neutrino sector point towards a relatively large value of the reactor angle, incompatible with a vanishing theta_ 13 at about 3 sigma. In order to explain such a result, we propose a SUSY model based on the broken L_e-L_mu-L_tau symmetry, where large deviations from the symmetric limit theta_12 = pi/4, tan(theta_23) \sim O(1) and theta_13 = 0 mainly come from the charged lepton sector. We show that a description of all neutrino data is possible if the charged lepton mass matrix has a special pattern of complex matrix elements.