Flavour Violation in Anomaly Mediated Supersymmetry Breaking

We study squark flavour violation in the anomaly mediated supersymmetry broken (AMSB) minimal supersymmetric standard model. Analytical expressions for the three-generational squark mass matrices are derived. We show that the anomaly-induced soft breaking terms have a decreasing amount of squark flavour violation when running from the GUT to the weak scale. Taking into account intergenerational squark mixing, we work out non-trivial constraints from B → Xsγ and Bs → μμ, which complement each other, as well as B → τν decays. We further identify a region of parameter space where the anomalous magnetic moment of the muon and the B → Xsγ branching ratio are simultaneously accommodated. Since anomaly mediation is of the minimal flavour-violating type, the generic flavour predictions for this class of models apply, including a CKM-induced (and hence small) Bs − B̄s-mixing phase.