Tests of Power Corrections for Event Shapes in e+e- Annihilation

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dc.creatorFernandez, P. A. Movilla
dc.creatorBethke, S.
dc.creatorBiebel, O.
dc.creatorKluth, S.
dc.date2001-05-21
dc.date2001-07-23
dc.date.accessioned2026-07-07T12:25:52Z
dc.date.available2026-07-07T12:25:52Z
dc.descriptionA study of perturbative QCD calculations combined with power corrections to model hadronisation effects is presented. The QCD predictions are fitted to differential distributions and mean values of event shape observables measured in e+e- annihilation at centre-of-mass energies from 14 to 189 GeV. We investigate the event shape observables thrust, heavy jet mass, C-parameter, total and wide jet broadening and differential 2-jet rate and observe a good description of the data by the QCD predictions. The strong coupling constant alpha_S(M_Z) and the free parameter of the power correction calculations alpha_0(2 GeV) are measured to be alpha_S(M_Z) = 0.1171 +/- 0.0032/0.0020 and alpha_0(2 GeV) = 0.513 +/- 0.066/0.045. The predicted universality of alpha_0 is confirmed within the uncertainties of the measurements.
dc.description28 pages, LaTeX2e, 21 .eps-files included, accepted by Eur. Phys. J. C
dc.identifierhttps://arxiv.org/abs/hep-ex/0105059
dc.identifierhttp://arxiv.org/abs/hep-ex/0105059
dc.identifierEur.Phys.J.C22:1-15,2001
dc.identifierdoi:10.1007/s100520100750
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214704
dc.subjectHigh Energy Physics - Experiment
dc.titleTests of Power Corrections for Event Shapes in e+e- Annihilation
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