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Test of Colour Reconnection Models using Three-Jet Events in Hadronic Z Decays.

Schael, S. and Bouhova-Thacker, E. V. and Bowdery, C. K. and Finch, A. J. and Jones, Roger W. L. and Hughes, Gareth and Smizanska, Maria and ALEPH, collaboration (2006) Test of Colour Reconnection Models using Three-Jet Events in Hadronic Z Decays. European Physical Journal C: Particles and Fields, 48 (3). pp. 685-698. ISSN 1434-6044

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Abstract

Hadronic Z decays into three jets are used to test QCD models of colour reconnection (CR). A sensitive quantity is the rate of gluon jets with a gap in the particle rapidity distribution and zero jet charge. Gluon jets are identified by either energy-ordering or by tagging two b-jets. The rates predicted by two string-based tunable CR models, one implemented in JETSET (the GAL model), the other in ARIADNE, are too high and disfavoured by the data, whereas the rates from the corresponding non-CR standard versions of these generators are too low. The data can be described by the GAL model assuming a small value for the R0 parameter in the range 0.01-0.02.

Item Type: Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 26328
Deposited By: Dr Maria Smizanska
Deposited On: 30 Apr 2009 16:27
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:31
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/26328

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