Bounds on quark mixing angles in the standard six-quark model

Using existing data we determine optimal bounds on the quark mixing angles in the standard six-quark Kobayashi-Maskawa version of the Weinberg-Salam model. The analysis is based on a recent generalized Cabibbo fit and constraints on the predicted values of the KL-KS mass difference and CP-nonconservation parameter ε. We give resulting bounds on branching ratios and lifetimes of c-, b-, and t-flavored hadrons.