0000000000756993

AUTHOR

S.l. Cartwright

showing 2 related works from this author

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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ALEPH: a Detector for Electron-Positron Annihilations at LEP

1990

Process-centred Software Engineering Environments (PSEE) are the most recent generation of environments supporting software development activities. Most of PSEE are based on mechanisms promoting enforcement and automation of process activities. In this kind of mechanisms the process models are prescribed in a detailed and complete way. But the experience shows that supporting processes is more concerned with the flexibility of guidance offered during the process performance than with enforcement of a collection of predefined process models. In this paper, we present a solution to support strategic processes in a PSEE by providing a flexible guidance during process enactment.

PhysicsFlexibility (engineering)Nuclear and High Energy PhysicsAlephhigh-energy physicsProcess modelingProcess (engineering)business.industrySoftware developmentLEPAutomationparticle detectorsData acquisitionDetectors and Experimental TechniquesLEP; particle detectors; high-energy physicsSoftware engineeringbusinessEnforcementInstrumentationparticle detector
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