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Properties of hadronicZ decays and test of QCD generators

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • ALEPH Collaboration
<mark>Journal publication date</mark>1992
<mark>Journal</mark>Zeitschrift für Physik C Particles and Fields
Issue number2
Number of pages26
Pages (from-to)209-234
Publication StatusPublished
<mark>Original language</mark>English


Distributions are presented of event shape variables, jet roduction rates and charged particle momenta obtained from 53 000 hadronicZ decays. They are compared to the predictions of the QCD+hadronization models JETSET, ARIADNE and HERWIG, and are used to optimize several model parameters. The JETSET and ARIADNE coherent parton shower (PS) models with running αs and string fragmentation yield the best description of the data. The HERWIG parton shower model with cluster fragmentation fits the data less well. The data are in better agreement with JETSET PS than with JETSETO(αS2) matrix elements (ME) even when the renormalization scale is optimized.