Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-10-02
Phys.Lett.B659:244-251,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
More references added. 14 pages, 2 figures
Scientific paper
10.1016/j.physletb.2007.10.078
We propose a parametrization of the lepton mixing matrix in terms of an expansion in powers of the deviations of the reactor, solar and atmospheric mixing angles from their tri-bimaximal values. We show that unitarity triangles and neutrino oscillation formulae have a very compact form when expressed in this parametrization, resulting in considerable simplifications when dealing with neutrino phenomenology. The parametrization, which is completely general, should help to establish possible relations between the deviations of the reactor, solar and atmospheric mixing angles from their tri-bimaximal values, and hence enable models which predict such relations to be more directly compared to experiment.
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