Neutrino masses and flavor mixing in a generalized inverse seesaw model with a universal two-zero texture

TL;DR

This paper proposes a generalized inverse seesaw model with a specific texture zero pattern in neutrino and charged lepton mass matrices, constrained by recent experimental data, and analyzes its implications for neutrino masses and mixing.

Contribution

It introduces a new generalized inverse seesaw model with a universal two-zero texture and derives the corresponding neutrino mass formula, incorporating recent experimental constraints.

Findings

One ansatz fits well with experimental data.

The model constrains neutrino mass and mixing parameters.

The Z_6 x Z_6 symmetry realizes the texture zeros.

Abstract

A generalized inverse seesaw model, in which the 9x9 neutrino mass matrix has vanishing (1,1) and (1,3) submatrices, is proposed. This is similar to the universal two-zero texture which gives vanishing (1,1) and (1,3) elements of the 3x3 mass matrices in both the charged lepton and neutrino sectors. We consider the Z_6 x Z_6 group to realize such texture zeros. We study this generalized inverse seesaw model systematically and derive the seesaw formula for the 3x3 mass matrix of three active neutrinos. We also analyze the universal two-zero texture in the general case and propose two ansatze to reduce the number of free parameters. Taking account of the new result of \theta_{13} from the Daya Bay experiment, we constrain the parameter space of the universal two-zero texture in the general case and in the two ansatze, respectively. We find that one of the ansatze works well.