Flavor changing processes in supersymmetric models with hybrid gauge- and gravity-mediation

We consider supersymmetric models where gauge mediation provides the dominant contributions to the soft supersymmetry breaking terms while gravity mediation provides sub-dominant yet non-negligible contributions. We further assume that the gravity-mediated contributions are subject to selection rules that follow from a Froggatt-Nielsen symmetry. This class of models constitutes an example of viable and natural non-minimally flavor violating models. The constraints from K ⁰- ⁰ mixing imply that the modifications to the Standard Model predictions for B _d- _d and B _s- _s mixing are generically at most at the percent level, but can be of order ten percent for large tan β. The modifications for D ⁰- ⁰ mixing are generically at most of order a few percent, but in a special subclass of models they can be of order one. We point out ΔB = 1 processes relevant for flavor violation in hybrid mediation.