Lectures on Models of Neutrino Masses and Mixings

TL;DR

This paper reviews various models of neutrino masses and mixings, focusing on recent advances, especially those involving discrete symmetries like A4, and discusses challenges in extending these models to quarks and grand unification.

Contribution

It provides a concise overview of models based on discrete symmetries for neutrino mixing, highlighting recent developments and current challenges in the field.

Findings

Analysis of A4 symmetry models for neutrino mixing

Discussion of difficulties in extending models to quark sector

Evaluation of grand unified model compatibility

Abstract

We present a concise review of models for neutrino masses and mixings with particular emphasis on recent developments and current problems. We discuss in detail attempts at reproducing approximate tri-bimaximal mixing starting from discrete symmetry groups, notably A4. We discuss the problems encountered when trying to extend the symmetry to the quark sector and to construct Grand Unified versions.