Measurement of |V_cs| Using W Decays at LEP2.
B. Erzen · International Linear Collider · 1998
Decays of W bosons, produced at LEP2, have been used to measure the jV cs j element of the Cabibbo-Kobayashi-Maskawa matrix.Values for jV cs j were extracted both from the measured hadronic branching ratio of W decays and by tagging the flavour of hadronic jets produced in W decays. Applying the two methods on the data col- lected during 1996 and 1997 at energies between 161 and 183 GeV, DELPHI obtains jV cs j = 0:99 0:06(stat) 0:05(syst).