Report of the QCD Working Group

Abstract

The activities of the QCD working group concentrated on improving the understanding and Monte Carlo simulation of multi-jet final states due to hard QCD processes at LEP, i.e. quark-antiquark plus multi-gluon and/or secondary quark production, with particular emphasis on four-jet final states and b-quark mass effects. Specific topics covered are: relevant developments in the main event generators PYTHIA, HERWIG and ARIADNE; the new multi-jet generator APACIC++; description and tuning of inclusive (all-flavour) jet rates; quark mass effects in the three- and four-jet rates; mass, higher-order and hadronization effects in four-jet angular and shape distributions; b-quark fragmentation and gluon splitting into b-quarks.

95 pages, 48 figures, contribution to Proceedings of the LEP2 Monte Carlo Workshop. References for NLO 4-jet matrix elements added

Cited by in corpus (5)

• Measurement of the top quark mass with the template method in the top antitop -> lepton + jets channel using ATLAS data
• b-tagging in DELPHI at LEP
• Measurement of the energy dependence of hadronic jet rates and the strong coupling alpha_s from the four-jet rate with the DELPHI detector at LEP
• Deterministic Annealing as a jet clustering algorithm in hadronic collisions
• Measurement of the ZZ cross-section in e+e- interactions at 183-189 GeV