par Abreu, Pedro;Lefebure, Véronique 
;Lemonne, Jacques ;Tomaradze, A.;Van Lysebetten, Ann;Verbeure, F;Wickens, John H. ;Bertrand, Daniel ;Chen, Max;Deghorain, A.;De Brabandere, S.;De Clercq, Catherine;Herquet, P. ;Hoorelbeke, S.;Huet, Kathy; [et al.]
Référence Physics letters. Section B, 416, 1-2, page (233-246)
Publication Publié, 1998-01
;Lemonne, Jacques ;Tomaradze, A.;Van Lysebetten, Ann;Verbeure, F;Wickens, John H. ;Bertrand, Daniel ;Chen, Max;Deghorain, A.;De Brabandere, S.;De Clercq, Catherine;Herquet, P. ;Hoorelbeke, S.;Huet, Kathy; [et al.]Référence Physics letters. Section B, 416, 1-2, page (233-246)
Publication Publié, 1998-01
Article révisé par les pairs
| Résumé : | The data collected by DELPHI in 1996 have been used to measure the average charged particle multiplicities and dispersions in qq̄ events at centre-of-mass energies of √s = 161 GeV and √s = 172 GeV, and the average charge multiplicity in WW events at √s = 172 GeV. The multiplicities in qq̄ events are consistent with the evolution predicted by QCD. The dispersions in the multiplicity distributions are consistent with Koba-Nielsen-Olesen (KNO) scaling. The average multiplicity of charged particles in hadronic W decays has been measured for the first time; its value, 19.23 ± 0.74(stat + syst), is consistent with that expected for an e+e- interaction at a centre-of-mass energy equal to the W mass. The charged particle multiplicity in W decays shows no evidence of effects of colour reconnection between partons from different W's at the present level of statistics. © 1998 Elsevier Science B.V. |
