A light pseudoscalar in a model with lepton family symmetry O(2)
High Energy Physics - Phenomenology
2009-01-06 v3
Abstract
We discuss a realization of the non-abelian group O(2) as a family symmetry for the lepton sector. The reflection contained in O(2) acts as a mu-tau interchange symmetry, enforcing--at tree level--maximal atmospheric neutrino mixing and a vanishing mixing angle theta_13. The small ratio m_mu/m_tau (muon over tau mass) gives rise to a suppression factor in the mass of one of the pseudoscalars of the model. We argue that such a light pseudoscalar does not violate any experimental constraint.
Keywords
Cite
@article{arxiv.0805.1175,
title = {A light pseudoscalar in a model with lepton family symmetry O(2)},
author = {W. Grimus and L. Lavoura and D. Neubauer},
journal= {arXiv preprint arXiv:0805.1175},
year = {2009}
}
Comments
20 pages, 2 figures; two footnotes and one reference added, final version for JHEP