Predictive Schemes for Bimaximal Neutrino Mixings

Details Predictive Schemes for Bimaximal Neutrino Mixings Predictive Schemes for Bimaximal Neutrino Mixings

2002-01-18

arxiv.org/abs/hep-ph/0201176v2

Phys.Lett. B532 (2002) 77-86

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, RevTeX, no figures, references added

Scientific paper

10.1016/S0370-2693(02)01434-X

We present simple and predictive scenarios for neutrino masses which lead to a bimaximal pattern of mixings that apparently provides the best fit to the current solar and atmospheric neutrino data. It is shown that an approximate global L_e-L_\mu-L_\tau symmetry, broken only by Planck scale effects, can naturally explain the bimaximal mixing pattern. In one scenario, the solar neutrino oscillation parameters are induced entirely through radiative renormalization group effects. A one parameter model describing all neutrino data is presented, which predicts U_{e3} = \sqrt{m_e/m_\tau} \simeq 0.017. A second two parameter scheme predicts U_{e3} to be vanishingly small. We also show how these scenarios can be extended to accommodate the LSND observations within a 3+1 neutrino oscillation scheme by including a mirror sector of particles and forces.

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