OPAL Collaboration (2000) W+W− production cross section and W branching fractions in e+e− collisions at 189 GeV. Physics Letters B, 249-26 (17). pp. 249-265. ISSN 0370-2693
Full text not available from this repository.Abstract
From a data sample of 183 pb−1 recorded at a center-of-mass energy of √s = 189 GeV with the OPAL detector at LEP, 3068 W-pair candidate events are selected. Assuming Standard Model W boson decay branching fractions, the W-pair production cross section is measured to be σWW = 16.30 ± 0.34(stat.) ± 0.18(syst.) pb. When combined with previous OPAL measurements, the W boson branching fraction to hadrons is determined to be 68.32 ± 0.61(stat.) ± 0.28(syst.)% assuming lepton universality. These results are consistent with Standard Model expectations.