Flavour violation in a supersymmetric T' model

TL;DR

This paper explores the flavor-changing phenomena in a supersymmetric T' model, analyzing leptonic and hadronic processes, and compares predictions with experimental constraints to assess the model's viability.

Contribution

It provides the first detailed comparison of leptonic and hadronic flavor observables within a supersymmetric T' flavor model, highlighting parameter regions consistent with experimental data.

Findings

Small u values make the model similar to MSUGRA.

Larger u and tan(beta) lead to observable deviations from MSUGRA.

The model is constrained by FCNC data in low m_0 regions, but viable at higher m_0.

Abstract

We describe the phenomenology of the flavour changing neutral current sector of a supersymmetric model, invariant under the T' discrete flavour group. This model has been proposed in Ref.[1] and describes realistic leptonic and hadronic masses and mixings and predicts the amount of flavour changing in terms of the small flavour breaking parameter u in [0.007, 0.05]. For small values of u, the model almost reduces to the MSUGRA framework, while sizable deviations from MSUGRA can be, instead, observed when larger values of u and tan(beta) are considered. We analyse in detail the T' BR(mu --> e gamma) prediction, concerning the leptonic sector, while for the hadronic sector we concentrate on b --> s gamma and neutral B meson mass differences. Moreover, for the first time a comparative study on leptonic and hadronic observables for the T' model is performed. The experimental data on FCNC observables severely constrain the model in the small m_0 region. Conversely for larger m_0, the T' model satisfies all the bounds.