New textures for the lepton mass matrices

Abstract

We study predictive textures for the lepton mass matrices in which the charged-lepton mass matrix has either four or five zero matrix elements while the neutrino Majorana mass matrix has, respectively, either four or three zero matrix elements. We find that all the viable textures of these two kinds share many predictions: the neutrino mass spectrum is inverted, the sum of the light-neutrino masses is close to 0.1 eV, the Dirac phase δ in the lepton mixing matrix is close to either 0 or π, and the mass term responsible for neutrinoless double-beta decay lies in between 12 and 22 meV.