Deviation from tri-bimaximal neutrino mixing in A4 flavor symmetry

Details Deviation from tri-bimaximal neutrino mixing in A4 flavor symmetry Deviation from tri-bimaximal neutrino mixing in A4 flavor symmetry

2007-12-31

arxiv.org/abs/0801.0181v2

Prog.Theor.Phys.119:583-598,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 18 figures, some discussions and references are added

Scientific paper

10.1143/PTP.119.583

The tri-bimaximal mixing is a good approximation for the present data of neutrino mixing angles. The deviation from the tri-bimaximal mixing is discussed numerically in the framework of the A4 model. Values of \tan^2\theta_{12}, \sin^2 2\theta_{23} and |U_{e3}| deviate from the tri-bimaximal mixing due to the corrections of the vacuum alignment of flavon fields. It is remarked that \sin^2 2\theta_{23} deviates scarcely from 1 while \sin^2\theta_{12} can deviate from 1/3 considerably and \sin\theta_{13} could be near the present experimental upper bound. The CP violating measure J_{CP} and the effective Majorana neutrino mass m_{ee} are also discussed.

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