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A Measurement of Sin2-theta-w From the Charge Asymmetry of Hadronic Events At the Z0 Peak

1992

Abstract View references (24)The weak mixing angle has been measured from the charge asymmetry of hadronic events with two different approaches using the DELPHI detector at LEP. Both methods are based on a momentum-weighted charge sum to determine the jet charge in both event hemispheres. In a data sample of 247 300 multihadronic Z0 decays a charge asymmetry of 〈QF〉 - 〈QB〉 = -0.0076±0.0012(stat.)±0.0005(exp. syst.)±0.0014(frag.) and a raw forward-backward asymmetry of Araw FB = -0.0109±0.0020(stat.)±0.0010(exp. syst.)±0.0017(frag.) have been measured. This result corresponds to a value of sinθeff=0.2345±0.0030(exp.)±0.0027(frag.) ,sin2θMS=0.2341±0.0030(exp.)±0. 0027(frag.) and to sin2θW=1-m…

Nuclear and High Energy PhysicsParticle physicsE+E ANNIHILATIONLUND MONTE-CARLOElectron–positron annihilationmedia_common.quotation_subjectHadronJet (particle physics)collective information systems01 natural sciencesAsymmetryJET FRAGMENTATIONNuclear physicsPHYSICS0103 physical sciencespersonal information system[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]LUND MONTE-CARLO; E+E ANNIHILATION; JET FRAGMENTATION; Z-DECAYS; PHYSICS010306 general physicsZ-DECAYSmedia_commonPhysicsRange (particle radiation)010308 nuclear & particles physicsWeinberg angleCharge (physics)information scienceQuadratic Gauss suminformation praticesPhysique des particules élémentairesHigh Energy Physics::ExperimentFísica nuclearParticle Physics - Experiment
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