A Shift from Democratic to Tri-bimaximal Neutrino Mixing with Relatively Large theta_{13}

Details A Shift from Democratic to Tri-bimaximal Neutrino Mixing with Relatively Large theta_{13} A Shift from Democratic to Tri-bimaximal Neutrino Mixing with Relatively Large theta_{13}

2010-11-12

arxiv.org/abs/1011.2954v2

Phys.Lett.B696:232-236,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 1 figure. Slight modifications. References added. Accepted for publication in PLB

Scientific paper

10.1016/j.physletb.2010.12.031

Recent neutrino oscillation data hint that the smallest neutrino mixing angle theta_{13} is possible to lie in the range 5^\circ \lesssim \theta_{13} \lesssim 12^\circ. We show that reasonable perturbations to the democratic mixing pattern, which is geometrically related to the tri-bimaximal mixing pattern through an equal shift \theta_* \simeq 9.7^\circ of two large mixing angles, can naturally produce a nearly tri-bimaximal neutrino mixing matrix V with sufficiently large theta_{13}. Two especially simple but viable scenarios of V are proposed and their phenomenological consequences are discussed.

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