Prediction of Ue3 and \cos 2θ_23 from discrete symmetry

Details Prediction of Ue3 and \cos 2θ_23 from discrete symmetry Prediction of Ue3 and \cos 2θ_23 from discrete symmetry

2005-05-05

arxiv.org/abs/hep-ph/0505031v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 2 figures, Talk at Rencontres de Moriond 2005(EW Interactions and Unified Theories)

Scientific paper

We discuss the question why the mixing $U_{e3}$ is small. The natural answer
is $U_{e3}=0$ in some symmetric limit, in which two large mixings are realized.
It is possible to force $U_{e3}$ and $\cos{2 \theta_{23}}$ to be zero by
imposing a discrete symmetry. We investigate a special class of symmetries
$Z_2$ and of the consequences of their perturbative violation.

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