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Predictive Schemes for Bimaximal Neutrino Mixings

K. S. Babu·R. N. Mohapatra
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Abstract

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_μ-L_τsymmetry, 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_τ} \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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K. S. Babu, R. N. Mohapatra. 2002-02-03. Predictive Schemes for Bimaximal Neutrino Mixings. https://doi.org/10.1016/s0370-2693(02)01434-x

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