Towards the minimal seesaw model for the prediction of neutrino CP violation

TL;DR

This paper explores a minimal seesaw model with two right-handed neutrinos to predict the Dirac CP violation phase and neutrino mass hierarchy, linking it to baryon asymmetry via leptogenesis.

Contribution

It introduces specific textures of lepton mixing matrices within a minimal seesaw framework, predicting the sign of CP violation and neutrino mass hierarchy.

Findings

Predicts negative sign of maximal Dirac CP phase

Supports normal hierarchy of neutrino masses

Links leptogenesis to observed baryon asymmetry

Abstract

We discuss the minimal seesaw model for the Dirac CP violating phase of the lepton mixing matrix. We introduce two right-handed Majorana neutrinos and obtain several textures of the tri-maximal lepton mixing matrices. Moreover, we discuss the observed baryon asymmetry of the universe through the leptogenesis mechanism. As the result, we obtain the specific model which predicts the negative sign of maximal Dirac CP violating phase and normal hierarchy of neutrino masses.