Charged Multiplicities in Z Decays into u, d, and s Quarks

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dc.creatorThe OPAL collaboration
dc.creatorAbbiendi, G.
dc.date2000-11-06
dc.date.accessioned2026-07-07T10:16:32Z
dc.date.available2026-07-07T10:16:32Z
dc.descriptionAbout 4.4 million hadronic decays of Z bosons, recorded by the OPAL detector at LEP at a centre-of-mass energy of around sqrt(s) = 91.2 GeV, are used to determine the mean charged particle multiplicities for the three light quark flavours. Events from primary u, d, and s quarks are tagged by selecting characteristic particles which carry a large fraction of the beam energy. The charged particle multiplicities are measured in the hemispheres opposite to these particles. An unfolding procedure is applied to obtain these multiplicities for each primary light quark flavour. This yields <n_u> = 17.77 +- 0.51 +0.86 -1.20, <n_d> = 21.44 +- 0.63 +1.46 -1.17, <n_s> = 20.02 +- 0.13 +0.39 -0.37, where statistical and systematic errors are given. The results for <n_u> and <n_d> are almost fully statistically anti-correlated. Within the errors the result is consistent with the flavour independence of the strong interaction for the particle multiplicities in events from the light up, down, and strange quarks.
dc.description24 pages, 3 figures, submitted to Eur. Phys. J. C
dc.identifierhttps://arxiv.org/abs/hep-ex/0011022
dc.identifierhttp://arxiv.org/abs/hep-ex/0011022
dc.identifierEur.Phys.J.C19:257-268,2001
dc.identifierdoi:10.1007/s100520100611
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/173540
dc.subjectHigh Energy Physics - Experiment
dc.titleCharged Multiplicities in Z Decays into u, d, and s Quarks
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