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:
Journal Article
Journal or Publication Title:
European Physical Journal C: Particles and Fields
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
26328
Deposited By:
Deposited On:
30 Apr 2009 15:27
Refereed?:
Yes
Published?:
Published
Last Modified:
11 Mar 2020 02:27

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