Flavour Violation in Anomaly Mediated Supersymmetry Breaking

Details Flavour Violation in Anomaly Mediated Supersymmetry Breaking Flavour Violation in Anomaly Mediated Supersymmetry Breaking

2009-02-27

arxiv.org/abs/0902.4880v2

JHEP 0904:088,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pages, 8 figures. v2: minor clarifications, reference added, to appear in JHEP

Scientific paper

10.1088/1126-6708/2009/04/088

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 inter-generational squark mixing, we work out non-trivial constraints from B -> Xs gamma and Bs -> mu mu, which complement each other, as well as B -> tau nu decays. We further identify a region of parameter space where the anomalous magnetic moment of the muon and the B -> Xs gamma 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-Bsbar-mixing phase.

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