Lepton Flavour Violation in the Constrained MSSM with Constrained Sequential Dominance

TL;DR

This paper investigates charged lepton flavor violation within a supersymmetric model extended by a see-saw mechanism with Constrained Sequential Dominance, revealing correlations among LFV processes influenced by neutrino mixing parameters and mass ordering.

Contribution

It introduces the impact of Constrained Sequential Dominance on LFV predictions in the constrained MSSM, highlighting the dependence on neutrino mixing angles and mass hierarchy.

Findings

LFV branching ratios show characteristic correlations based on right-handed neutrino mass ordering.

LFV predictions depend strongly on the leptonic mixing angle θ13.

In some cases, the Dirac CP phase δ significantly affects LFV rates.

Abstract

We consider charged Lepton Flavour Violation (LFV) in the Constrained Minimal Supersymmetric Standard Model, extended to include the see-saw mechanism with Constrained Sequential Dominance (CSD), where CSD provides a natural see-saw explanation of tri-bimaximal neutrino mixing. When charged lepton corrections to tri-bimaximal neutrino mixing are included, we discover characteristic correlations among the LFV branching ratios, depending on the mass ordering of the right-handed neutrinos, with a pronounced dependence on the leptonic mixing angle $\theta_{13}$ (and in some cases also on the Dirac CP phase $\delta$).