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Standard Model Physics Results from LEP2

At LEP2 many Standard Model predictions are tested up to centre-of-mass energies of 209 GeV. Fermion pair production cross sections and asymmetries agree well with the theoretical expectation over the entire energy range. The measurements are used to determine the gamma/Z interference and to search...

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Autor principal: Wynhoff, Stephan
Lenguaje:eng
Publicado: 2000
Materias:
Acceso en línea:http://cds.cern.ch/record/483404
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author Wynhoff, Stephan
author_facet Wynhoff, Stephan
author_sort Wynhoff, Stephan
collection CERN
description At LEP2 many Standard Model predictions are tested up to centre-of-mass energies of 209 GeV. Fermion pair production cross sections and asymmetries agree well with the theoretical expectation over the entire energy range. The measurements are used to determine the gamma/Z interference and to search for contact interactions up to 20 TeV. The cross sections for single-W, ZZ and W+W- production agree well with the expectations. The branching fractions of the W boson into hadrons and leptons are determined as well as the CKM matrix element |V_{cs}|. Precise measurements of the W mass and width are presented yielding MW=80.427+-0.046 GeV and GammaW=2.12=_0.11 GeV. All electroweak data are very consistent with the Standard Model predictions. In a combined fit using the recent value of Delta alpha_{had}^(5)(s) the mass of the Higgs boson is constrained to MH=88^{+60}_{-37} GeV.
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institution Organización Europea para la Investigación Nuclear
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publishDate 2000
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spelling cern-4834042020-06-29T03:49:29Zhttp://cds.cern.ch/record/483404engWynhoff, StephanStandard Model Physics Results from LEP2Particle Physics - ExperimentParticle Physics - PhenomenologyAt LEP2 many Standard Model predictions are tested up to centre-of-mass energies of 209 GeV. Fermion pair production cross sections and asymmetries agree well with the theoretical expectation over the entire energy range. The measurements are used to determine the gamma/Z interference and to search for contact interactions up to 20 TeV. The cross sections for single-W, ZZ and W+W- production agree well with the expectations. The branching fractions of the W boson into hadrons and leptons are determined as well as the CKM matrix element |V_{cs}|. Precise measurements of the W mass and width are presented yielding MW=80.427+-0.046 GeV and GammaW=2.12=_0.11 GeV. All electroweak data are very consistent with the Standard Model predictions. In a combined fit using the recent value of Delta alpha_{had}^(5)(s) the mass of the Higgs boson is constrained to MH=88^{+60}_{-37} GeV.At LEP2 many Standard Model predictions are tested up to centre-of-mass energies of 209 GeV. Fermion pair production cross sections and asymmetries agree well with the theoretical expectation over the entire energy range. The measurements are used to determine the gamma/Z interference and to search for contact interactions up to 20 TeV. The cross sections for single-W, ZZ and W+W- production agree well with the expectations. The branching fractions of the W boson into hadrons and leptons are determined as well as the CKM matrix element |V_{cs}|. Precise measurements of the W mass and width are presented yielding MW=80.427+-0.046 GeV and GammaW=2.12=_0.11 GeV. All electroweak data are very consistent with the Standard Model predictions. In a combined fit using the recent value of Delta alpha_{had}^(5)(s) the mass of the Higgs boson is constrained to MH=88^{+60}_{-37} GeV.hep-ex/0101016oai:cds.cern.ch:4834042000
spellingShingle Particle Physics - Experiment
Particle Physics - Phenomenology
Wynhoff, Stephan
Standard Model Physics Results from LEP2
title Standard Model Physics Results from LEP2
title_full Standard Model Physics Results from LEP2
title_fullStr Standard Model Physics Results from LEP2
title_full_unstemmed Standard Model Physics Results from LEP2
title_short Standard Model Physics Results from LEP2
title_sort standard model physics results from lep2
topic Particle Physics - Experiment
Particle Physics - Phenomenology
url http://cds.cern.ch/record/483404
work_keys_str_mv AT wynhoffstephan standardmodelphysicsresultsfromlep2