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Author: H. Voss (Helge.Voss@cern.ch), for the OPAL Collaboration

Title: Measurement of the WW cross-section and triple gauge couplings at OPAL

Abstract: A study of W-pair and production in e+e- collisions at LEP energies up to 183 GeV is presented. Using all decay channels, the total W+W- cross-section is measured as well as the leptonic and hadronic branching fractions, from which a value for the CKM matrix element |Vcs| is extracted. The measured cross-section and the angular distributions of the selected events are analysed in terms of the triple gauge boson couplings. Both single parameter and multi-parameter fits are performed. No significant deviations from the Standard Model are observed. Presented also is a spin density matrix element analysis of the W-boson helicity structure.

Comments: 7 pages, LaTexReport-no:Subj-class: experimental particle physics

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