Deviation from tri-bimaximal mixing and flavor symmetry breaking in a seesaw type A4 model

Details Deviation from tri-bimaximal mixing and flavor symmetry breaking in a seesaw type A4 model Deviation from tri-bimaximal mixing and flavor symmetry breaking in a seesaw type A4 model

2009-04-24

arxiv.org/abs/0904.3820v2

Phys.Lett.B680:334-342,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 8 figures, revised version

Scientific paper

10.1016/j.physletb.2009.09.012

We have studied the contribution of higher order corrections of the flavor symmetry breaking in the $A_4$ seesaw model with the supersymmetry. Taking account of possible higher dimensional mass operators, we predict the deviation from the tri-bimaximal lepton mixing for both normal hierarchy and inverted hierarchy of neutrino masses. We have found that the value of $\sin^2 2\theta_{23}$ is larger than 0.96 and the upper bound of $\sin^2\theta_{13}$ is 0.01. We have also examined the flavor changing neutral current of leptons from the soft SUSY breaking in slepton masses and A-terms within the framework of supergravity theory. Those magnitudes are enough suppressed to be consistent with experimental constraints.

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