Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-07-12
Phys.Lett. B625 (2005) 264-276
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 4 figures; to appear in PLB
Scientific paper
10.1016/j.physletb.2005.08.092
Current neutrino data are consistent with the so-called tribimaximal mixing scenario, which predicts \sin^2 \theta_{12}=1/3, zero U_{e3} and maximal \theta_{23}. This implies a special form of the neutrino mass matrix. Introducing small breaking terms in this mass matrix generates deviations from the tribimaximal scheme and leads to testable correlations between the parameters. They depend on where the perturbation is located in the mass matrix. A special case of such perturbations are radiative corrections. Alternative deviations from tribimaximal mixing may stem from contributions of the charged lepton sector. If there is quark-lepton-unification and it is the CKM matrix which corrects the tribimaximal mixing scheme, then almost maximal CP violation and sizable deviation from zero U_{e3} are implied.
Plentinger Florian
Rodejohann Werner
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