Measurement of vertical bar V-cs vertical bar using W decays at LEP2

Decays of W+/- bosons, produced at LEP2, have been used to measure the \V-cs\ element of the Cabibbo-Kobayashi-Maskawa matrix. Values for \V-cs\ were extracted both from the measured hadronic branching ratio of W+/- decays and by tagging the flavour of ha