LFV and Dipole Moments in Models with A4 Flavour Symmetry

Details LFV and Dipole Moments in Models with A4 Flavour Symmetry LFV and Dipole Moments in Models with A4 Flavour Symmetry

2009-02-18

arxiv.org/abs/0902.3067v1

J.Phys.Conf.Ser.171:012083,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 1 figure. Adapted from a talk given at "DISCRETE'08: Symposium on Prospects in the Physics of Discrete Symmetries",

Scientific paper

10.1088/1742-6596/171/1/012083

It is presented an analysis on lepton flavour violating transitions, leptonic magnetic dipole moments and electric dipole moments in a class of models characterized by the flavour symmetry A4 x Z3 x U(1)_FN, whose choice is motivated by the approximate Tri-Bimaximal mixing observed in neutrino oscillations. A low-energy effective Lagrangian is constructed, where these effects are dominated by dimension six operators, suppressed by the scale M of new physics. All the flavour breaking effects are universally described by the vacuum expectation values of a set of spurions. Two separate cases, a supersymmetric and a general one, are described. An upper limit on the reactor angle of a few percent is concluded.

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