Event shape and charged particle inclusive distributions are measured using 750000 decays of the Z to hadrons from the DELPHI detector at LEP. These precise data allow a decisive confrontation with models of the hadronization process. Improved tunings of the JETSET, ARIADNE and HERWIG parton shower models and the JETSET matrix element model are obtained by fitting the models to these DELPHI data as well as to identified particle distributions from all LEP experiments. The description of the data distributions by the models is critically reviewed with special importance attributed to identified particles.
Difference in Hemisphere Masses. Corrected to final state particles.
Differential 2-jet rate for the Durham Algorithm. Corrected to final state particles. YCUT is the jet finding cutt-off parameter.
Differential 2-jet rate for the JADE Algorithm. Corrected to final state particles. YCUT is the jet finding cutt-off parameter.
Previously published and as yet unpublished QCD results obtained with the ALEPH detector at LEP1 are presented. The unprecedented statistics allows detailed studies of both perturbative and non-perturbative aspects of strong interactions to be carried out using hadronic Z and tau decays. The studies presented include precise determinations of the strong coupling constant, tests of its flavour independence, tests of the SU(3) gauge structure of QCD, study of coherence effects, and measurements of single-particle inclusive distributions and two-particle correlations for many identified baryons and mesons.
Measure n-jet rates using the Durham cluster algorithm as a function of thejet-resolution parameter YCUT.
Measure n-jet rates using the Durham cluster algorithm as a function of thejet-resolution parameter YCUT.
Measure n-jet rates using the Durham cluster algorithm as a function of thejet-resolution parameter YCUT.