A(4) Flavor Symmetry Model for Dirac-Neutrinos and Sizable U(e3)
Abstract
Models based on flavor symmetries are the most often studied approaches to explain the unexpected structure of lepton mixing. In many flavor symmetry groups a product of two triplet representations contains a symmetric and an anti-symmetric term. If this product of two triplets corresponds to a Majorana mass term, then the anti-symmetric part vanishes, and in economic models tri-bimaximal mixing is achieved. If neutrinos are Dirac particles, the anti-symmetric part is however present and leads to deviations from tri-bimaximal mixing, in particular non-zero U(e3). Thus, the non-vanishing value of U(e3) and the nature of the neutrino are connected. We illustrate this with a model based on A(4) within the framework of a neutrinophilic 2 Higgs doublet scenario.
Keywords
Cite
@article{arxiv.1301.2963,
title = {A(4) Flavor Symmetry Model for Dirac-Neutrinos and Sizable U(e3)},
author = {Nina Memenga and Werner Rodejohann and He Zhang},
journal= {arXiv preprint arXiv:1301.2963},
year = {2013}
}
Comments
8 pages, 2 figures