Large Neutrino Mixing with Universal Strength of Yukawa Couplings

TL;DR

This paper explores how a universal Yukawa coupling strength can produce large neutrino mixing angles and quasi-degenerate neutrino masses through specific mass matrix structures within the see-saw mechanism.

Contribution

It introduces a novel USY ansatz for neutrino and charged lepton mass matrices that explains large mixing angles and neutrino degeneracy.

Findings

Large leptonic mixing angles are achieved.

Neutrino masses are nearly degenerate.

The model explains atmospheric and solar neutrino data.

Abstract

We analyse, within the framework of universal strength for Yukawa couplings (USY), various structures for the Dirac and Majorana neutrino mass matrices giving rise, through the see-saw mechanism, to a degenerate mass spectrum. A specific USY ansatz is presented for the charged lepton and neutrino effective mass matrix, leading to quasi-degenerate neutrinos and a leptonic mixing matrix which provides a large angle solution for both the atmospheric and solar neutrino problems.