DISCRETE '08: Symposium on Prospects in the Physics of Discrete Symmetries

LFV and Dipole Moments in Models with A4 Flavour Symmetry

11 Dec 2008, 15:10

20m

Valencia, Spain

Family Symmetries Parallel Session B. Family symmetries-I

Speaker

Mr Luca Merlo (Università di Padova & INFN Padova)

Description

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 <Phi> of a set of spurions. Two separate cases, a supersymmetric and a general one, are described. An upper limit on (theta)_13 of a few percent is concluded.

Presentation materials

Paper

http://iopscience.iop.org/1742-6596/171/1/012083

Slides

Merlo,Discrete.pdf