On quasidegeneracy of Majorana neutrinos and the observed pattern of Leptonic mixing

TL;DR

This paper explores how near-degeneracy of Majorana neutrinos can explain the observed leptonic mixing pattern, including the value of |U_{13}| and CP violation, by analyzing correlations among physical observables.

Contribution

It introduces a framework linking neutrino quasi-degeneracy to leptonic mixing and CP violation, providing new insights into neutrino mass schemes.

Findings

Lifting neutrino degeneracy explains |U_{13}|

Correlations among physical observables are identified

Potential for sizeable CP violation is shown

Abstract

We relate the observed pattern of leptonic mixing to the quaidegeneracy of three Majorana neutrinos. We show how lifting the degeneracy may lead to the measured value of $|U_{13}|$ and to sizeable CP violation of Dirac-type. We show some of the correlations obtained among physical observables, starting from some of the most interesting schemes proposed in the literature.