Lepton Flavour Violation in a Supersymmetric Model with A4 Flavour Symmetry

Details Lepton Flavour Violation in a Supersymmetric Model with A4 Flavour Symmetry Lepton Flavour Violation in a Supersymmetric Model with A4 Flavour Symmetry

2009-11-19

arxiv.org/abs/0911.3874v1

Nucl.Phys.B832:251-288,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

44 pages

Scientific paper

10.1016/j.nuclphysb.2010.02.010

We compute the branching ratios for mu-> e gamma, tau-> mu gamma and tau -> e gamma in a supersymmetric model invariant under the flavour symmetry group A4 X Z3 X U(1)_{FN}, in which near tri-bimaximal lepton mixing is naturally predicted. At leading order in the small symmetry breaking parameter u, which is of the same order as the reactor mixing angle theta_{13}, we find that the branching ratios generically scale as u^2. Applying the current bound on the branching ratio of mu -> e gamma shows that small values of u or tan(beta) are preferred in the model for mass parameters m_{SUSY} and m_{1/2} smaller than 1000 GeV. The bound expected from the on-going MEG experiment will provide a severe constraint on the parameter space of the model either enforcing u approx 0.01 and small tan(beta) or m_{SUSY} and m_{1/2} above 1000 GeV. In the special case of universal soft supersymmetry breaking terms in the flavon sector a cancellation takes place in the amplitudes and the branching ratios scale as u^4, allowing for smaller slepton masses. The branching ratios for tau -> mu gamma and tau -> e gamma are predicted to be of the same order as the one for mu -> e gamma, which precludes the possibility of observing these tau decays in the near future.

Affiliated with

Also associated with

No associations

Rating

Lepton Flavour Violation in a Supersymmetric Model with A4 Flavour Symmetry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Lepton Flavour Violation in a Supersymmetric Model with A4 Flavour Symmetry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lepton Flavour Violation in a Supersymmetric Model with A4 Flavour Symmetry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-453858