WW Production Cross Section and W Branching Fractions in e+e- Collisions at 189 GeV

Abstract

From a data sample of 183 pb^-1 recorded at a center-of-mass energy of roots = 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 sigmaWW = 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.

22 pages, 5 figures, submitted to Phys. Lett. B

References in corpus (8)

• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Electroweak radiative corrections to e+e- --> WW --> 4fermions in double-pole approximation -- the RACOONWW approach
• Search for Anomalous Production of Di-lepton Events with Missing Transverse Momentum in e+e- Collisions at sqrt(s) = 183-209 GeV
• O(alpha) corrections to e+e- --> WW --> 4fermions(+gamma): first numerical results from RACOONWW
• Precision Predictions for (Un)Stable W+W- Pair Production At and Beyond LEP2 Energies Beyond LEP2 Energies
• Measurement of W-pair production in e+e- collisions at 189GeV
• W pair production cross-section and W branching fractions in e+e- interactions at 189 GeV
• A Measurement of the Rate of Charm Production in W Decays

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