Five texture zeros in the lepton sector and neutrino oscillations at DUNE

TL;DR

This paper explores a specific lepton mass matrix structure with five texture zeros, analyzing its implications for neutrino oscillations and the potential to detect CP violation at the DUNE experiment.

Contribution

It introduces a model with five texture zeros in lepton mass matrices and assesses its testability through DUNE neutrino oscillation measurements.

Findings

DUNE can detect CP violation predicted by the model.

Texture zeros reduce free parameters in lepton mixing matrices.

Model predictions are consistent with current neutrino data.

Abstract

In this work, we have assumed special structures for the charged and neutral mass matrices in the lepton sector, inspired by structures for the up and down quark mass matrices that result by assuming a certain number of symmetrical zeros in their entries named texture zeros. A prediction of the lepton mixing matrix results from the rotation matrices that diagonalize the mass matrices in the neutral and charged lepton sectors. The use of texture zeros reduces the number of spurious parameters to the minimal ones needed to explain observations i.e. charged lepton masses and neutrino oscillation parameters. Specifically, we have considered the case of five texture zeros and we have confronted the resulting lepton mixing matrices with current measurements in the neutrino sector. Finally, sensitivities to the independent parameters in the mixing predicted by the nonequivalent forms were studied using simulated events at the DUNE neutrino oscillation experiment. We have found that DUNE is sensitive to nonzero CP violation allowed in the models.