Tri-Bimaximal Neutrino Mixing and Discrete Flavour Symmetries
Abstract
We review the application of non-Abelian discrete groups to Tri-Bimaximal (TB) neutrino mixing, which is supported by experiment as a possible good first approximation to the data. After summarizing the motivation and the formalism, we discuss specific models, mainly those based on A4 but also on other finite groups, and their phenomenological implications, including the extension to quarks. The recent measurements of \theta_13 favour versions of these models where a suitable mechanism leads to corrections to \theta_13 that can naturally be larger than those to \theta_12 and \theta_23. The virtues and the problems of TB mixing models are discussed, also in connection with lepton flavour violating processes, and the different approaches are compared.
Keywords
Cite
@article{arxiv.1205.5133,
title = {Tri-Bimaximal Neutrino Mixing and Discrete Flavour Symmetries},
author = {Guido Altarelli and Ferruccio Feruglio and Luca Merlo},
journal= {arXiv preprint arXiv:1205.5133},
year = {2015}
}
Comments
26 pages, 5 figures, 4 tables. V3 submitted to add an acknowledgment to a network. Review written for the special issue on "Flavor Symmetries and Neutrino Oscillations", published in Fortschritte der Physik - Progress of Physics