Implications of the top quark mass measurement for the CKM parameters x$_{s}$ and CP asymmetries

Motivated by the recent determination of the top quark mass by the CDF collaboration, \mt =174 \pm 10 ^{+13}_{-12} GeV, we review and update constraints on the parameters of the quark flavour mixing matrix V_{CKM} in the standard model. In performing these fits, we use inputs from the measurements of \abseps, the CP-violating parameter in K decays, \xd = (\delm)/\Gamma, the mixing parameter in \bdbdbar\ mixing, the present measurements of the matrix elements \absvcb and \absvub, and the B-hadron lifetimes. The CDF value for \mt considerably reduces the CKM-parameter space previously allowed. An interesting result of our analysis is that the present data can be used to restrict the coupling constant product ratio f_{B_d}\sqrt{B_{B_d}} to the range 110-270 MeV -- in comfortable agreement with existing theoretical estimates of this quantity. We use the updated CKM matrix to predict the \bsbsbar\ mixing ratio \xs, as well as the quantities \sin 2\alpha, \sin 2\beta and \sin^2\gamma, which characterize CP-violating asymmetries in B-decays.