D-D¯ mixing constraints on FCNC with a non-universal Z′

The BaBar and Belle Collaborations have recently reported evidence for D0-D¯0 mixing. This measurement provides the first significant constraint on FCNC in the up-quark sector for non-universal Z′ models. Attributing the observed D-D¯ mixing to new physics, we comment on the resulting rare D and t decays. We also show that a CP violating semileptonic asymmetry as large as ∼30% is allowed by the experimental results.