Search results for "W-pair production"

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Measurement of W-pair production in e+e- collisions at 183 GeV

1999

The production of W+W- pairs is analysed in a data sample collected by ALEPH at a mean centre-of-mass energy of 182.7 GeV, corresponding to an integrated luminosity of 57 pb-1. Cross sections are given for different topologies of W decays into leptons or hadrons. Under Standard Model assumptions for the W-pair production and decay, the W-pair cross section is measured to be 15.57+-0.62(stat.)+-0.29(syst.) pb. Using also the W-pair data samples collected by ALEPH at lower centre-of-mass energies, the decay branching ratio of the W boson into hadrons is measured to be B(W->hadrons)= 68.93+-1.21(stat.)+-0.51(syst.)%, allowing a determination of the CKM matrix element |Vcs|= 1.043 +- 0.058(s…

Nuclear and High Energy PhysicsAlephParticle physicsALEPH Experiment; LEP; W-pair productionElectron–positron annihilationHadronFOS: Physical sciences01 natural sciencesHigh Energy Physics - ExperimentALEPH ExperimentHigh Energy Physics - Experiment (hep-ex)0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physicsNuclear ExperimentBhabha scatteringPhysicsW-pair production010308 nuclear & particles physicsBranching fractionCabibbo–Kobayashi–Maskawa matrixLEPPair productionHigh Energy Physics::ExperimentParticle Physics - ExperimentLepton
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