Neutrino phenomenology and stable dark matter with A4
arXiv:1011.1371 · doi:10.1016/j.physletb.2011.02.019
Abstract
We present a model based on the A4 non-abelian discrete symmetry leading to a predictive five-parameter neutrino mass matrix and providing a stable dark matter candidate. We found an interesting correlation among the atmospheric and the reactor angles which predicts theta_23 ~ pi/4 for very small reactor angle and deviation from maximal atmospheric mixing for large theta_13. Only normal neutrino mass spectrum is possible and the effective mass entering the neutrinoless double beta decay rate is constrained to be |m_ee| > 4 10^{-4} eV.
7 pages, 2 figures, minor changes to match the version to appear in PLB