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 $K_L-K_S$ mass difference and $\mathrm{CP}$-nonconservation parameter $\epsilon$. We give resulting bounds on branching ratios and lifetimes of $c$-, $b$-, and $t$-flavored hadrons.