J. Swain et L. Taylor, FIRST DETERMINATION OF THE QUARK MIXING MATRIX ELEMENT V-TB FROM ELECTROWEAK CORRECTIONS TO Z-DECAYS - ART. NO. 093006, Physical review. D. Particles and fields, 5809(9), 1998, pp. 3006
We present a new method for the determination of the Cabibbo-Kobayashi
-Maskawa quark mixing matrix element \V-tb\ from electroweak loop corr
ections, in particular those affecting the process Z --> b (b) over ba
r. From a combined analysis of results from the CERN LEP, SLC, Fermila
b Tevatron, and neutrino scattering experiments we determine \V-tb\ =
0.77(-0.24)(+0.18). [S0556-2821(98)04621-9].