Theories of Leptonic Flavor

TL;DR

This paper reviews various theoretical frameworks for leptonic flavor, including abelian and non-abelian symmetries, and their ability to explain lepton masses, mixing angles, and CP phases.

Contribution

It provides a comparative analysis of different flavor symmetry models, highlighting their strengths and limitations in describing leptonic phenomena.

Findings

Abelian flavor symmetries can explain some lepton mass patterns.

Non-abelian symmetries offer richer structures for mixing angles.

Incorporating CP symmetry enhances model predictive power.

Abstract

I discuss different theories of leptonic flavor and their capability of describing the features of the lepton sector, namely charged lepton masses, neutrino masses, lepton mixing angles and leptonic (low and high energy) CP phases. In particular, I show examples of theories with an abelian flavor symmetry G_f, with a non-abelian G_f as well as theories with non-abelian G_f and CP.