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We fit the ${\cal CKM}$-matrix to all recent data with the following freeparameters: three mixing angles, the CP-violating angle $\delta$ in the Maianiparametrisation, the top quark mass $m_t$, and the product $f_B{\calB}_{\B}^{1/2}$, where $f_B$ is the $B$-meson decay parameter and ${\calB}_{\B}$ is the bag parameter. Our fits span a contiguous region in the$(f_B{\cal B}_{\B}^{1/2},\ \cos\delta)$--plane, limited by $0.117\lsim f_B{\calB}_{\B}^{1/2}/{\rm GeV}\lsim 0.231$ and --0.95 $\lsim$ $\cos\delta$ $\lsim$0.70. The parameters $f_B{\cal B}_{\B}^{1/2}$ and $\cos\delta$ are stronglypositively correlated.Comment: 9 pages + 1 figure available upon request, HU-TFT-94-3

Phenomenological determination of the beauty meson decay parameterf B and the CP-violating angle ?