Measurement of the W pair production cross section and W branching ratios with the DELPHI detector

Data collected with the DELPHI detector at centre-of-mass energies up to the highest values explored by the LEP collider of about 206 GeV have been used to extract preliminary values of the cross-section for the process e/sup +/e/sup -/ to W/sup +/W/sup -/. The branching ratios of the W decay were also measured; from them the value of V /sub cs/ was extracted. The results are compared with the most recent calculations in the framework of the standard model. (5 refs).