1996/08/14 by K. Abe, I. Abt, T. Akagi +96 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1016/0370-2693(96)01025-8
published as Phys.Lett.B386:475-485,1996 · 19 pages LaTex, 4 EPS figures, to appear in Physics Letters B
arxiv created 1996/08/14 · openalex publication_date 1996/10/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
Average charged multiplicities have been measured separately in b, c and light quark (u,d,s) events from Z0 decays measured in the SLD experiment. Impact parameters of charged tracks were used to select enriched samples of b and light quark events, and reconstructed charmed mesons were used to select c quark events. We measured the charged multiplicities: nuds = 20.21 ± 0.10 (\rmstat.)± 0.22(\rmsyst.), nc = 21.28 ± 0.46(\rmstat.) +0.41-0.36(\rmsyst.) nb = 23.14 ± 0.10(\rmstat.) +0.38-0.37(\rmsyst.), from which we derived the differences between the total average charged multiplicities of c or b quark events and light quark events: Δnc = 1.07 ± 0.47(\rmstat.)+0.36-0.30(\rmsyst.) and Δnb = 2.93 ± 0.14(\rmstat.)+0.30-0.29(\rmsyst.). We compared these measurements with those at lower center-of-mass energies and with perturbative QCD predictions. These combined results are in agreement with the QCD expectations and disfavor the hypothesis of flavor-independent fragmentation.