By evolution of fermion mass matrices of the Fritzsch and the Georgi-Jarlskog forms from the supersymmetric grand unified scale, Dimopoulos, Hall, and Raby obtained predictions for the quark masses and mixings. Using Monte Carlo methods we test these predictions against the latest determinations of the mixings, the CP-violating parameter ${\mathrm{\epsilon }}_{\mathit{K}}$, and the ${\mathit{B}}_{\mathit{d}}^0$-B${\mathrm{¯}}_{\mathit{d}}^0$ mixing parameter ${\mathit{r}}_{\mathit{d}}$. The acceptable solutions closely specify the quark mixings, but lie at the edges of allowed regions at 90% confidence level.

• Received 10 April 1992

DOI:https://doi.org/10.1103/PhysRevLett.68.3394