Quark mass ratios and mixing angles from SU(3) family gauge symmetry

We explore a framework for the computation of quark mass ratios and CKM mixing angles based on an SU(3) family gauge symmetry. The four ratios md/mb, ms/mb, mu/mt, and mc/mt can be fit at one loop in the family gauge interaction. The same is true of the quark mixing angles θ12 and θ23, although the result for θ13 is too small. The CP-violating phase is naturally O(1).