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Experimental Studies on Multi-Jet Production in e+ e- Annihilation at PETRA Energies

Bartel, W. and Finch, Alexander (1986) Experimental Studies on Multi-Jet Production in e+ e- Annihilation at PETRA Energies. Zeitschrift für Physik C Particles and Fields, 33 (1). pp. 23-31. ISSN 0170-9739

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Abstract

Hadronic jet production bye + e −-annihilation has been studied in the energy range of 14.0–46.7 GeV. The data have been analysed in terms of a cluster algorithm and other topological quantities. The results are compared with 2nd order QCD calculations which incorporate models for the fragmentation of quarks and gluons into hadrons. At the higher energies we observe more spherical and 4-jet like events than predicted by these calculations. We cannot achieve a simultaneous description of the observed 3- and 4-jet production by adjusting the strong coupling constant α s or the fragmentation parameters of the 2nd order QCD models. The observed excess of spherical events can partially be explained by the production of multi-parton events expected from higher order QCD contributions. Consequences of the presented results for the value of α s , determined in previous analyses, are discussed. QCD parton shower models, including soft gluon interference, are able to describe the observed number of spherical events.

Item Type: Article
Journal or Publication Title: Zeitschrift für Physik C Particles and Fields
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 63868
Deposited By: ep_importer_pure
Deposited On: 02 May 2013 14:24
Refereed?: Yes
Published?: Published
Last Modified: 20 Sep 2017 06:27
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/63868

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