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 quark events. We measured the charged multiplicities: n̄uds = 20.21 ± 0.10(stat.) ± 0.22(syst.), n̄c = 21.28 ± 0.46(stat.)+0.41-0.36(syst.) and n̄b = 23.14 ± 0.10(stat.)+0.38-0.37(syst.), from which we derived the differences between the total average charged multiplicities of c or b quark events and light quark events: Δn̄c = 1.07 ± 0.47(stat.)+0.36-0.30(syst.) and Δn̄b = 2.93 ± 0.14(stat.)+0.30-0.29(syst). 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.
|Original language||English (US)|
|Number of pages||11|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Oct 3 1996|
ASJC Scopus subject areas
- Nuclear and High Energy Physics