Finite Modular Groups and Lepton Mixing
Abstract
We study lepton mixing patterns which are derived from finite modular groups Gamma_N, requiring subgroups G_nu and G_e to be preserved in the neutrino and charged lepton sectors, respectively. We show that only six groups Gamma_N with N=3,4,5,7,8,16 are relevant. A comprehensive analysis is presented for G_e arbitrary and G_nu=Z2 x Z2, as demanded if neutrinos are Majorana particles. We discuss interesting patterns arising from both groups G_e and G_nu being arbitrary. Several of the most promising patterns are specific deviations from tri-bimaximal mixing, all predicting theta_13 non-zero as favoured by the latest experimental data. We also comment on prospects to extend this idea to the quark sector.
Cite
@article{arxiv.1112.1340,
title = {Finite Modular Groups and Lepton Mixing},
author = {Reinier de Adelhart Toorop and Ferruccio Feruglio and Claudia Hagedorn},
journal= {arXiv preprint arXiv:1112.1340},
year = {2015}
}
Comments
27 pages + 8 pages of appendices, 1 figure