par Clerbaux, Barbara 
; [et al.]
Référence European Physical Journal C. Particles and Fields, 48, page (685-698)
Publication Publié, 2006
; [et al.]Référence European Physical Journal C. Particles and Fields, 48, page (685-698)
Publication Publié, 2006
Article révisé par les pairs
| Résumé : | 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. © Springer-Verlag Berlin Heidelberg 2006. |
