Properties of leading particles in hadronic Z{sup 0} decays
The authors present studies of leading particle production in Z{sup 0} decays into light, c, and b quarks performed with the SLD experiment at SLAC. The SLD precision vertex detector was exploited to tag light-flavor events, to tag charmed meson vertices and separate the prompt and B-decay components, and to reconstruct B-hadrons partially. The relative production of prompt pseudoscalar and vector D-mesons was measured to be P{sub V} = 0.53 {+-} 0.06(stat.) {+-} 0.02(syst.) (preliminary). The shape of the B-hadron energy spectrum was found to be consistent with the predictions of a number of models, and the average energy fraction was measured to be = 0.697 {+-} 0.012(stat.) {+-} 0.028(syst.) (preliminary). Separation of light quark and antiquark jets was achieved using the highly polarized SLC electron beam, and hadrons were identified using the SLD Cherenkov Ring Imaging Detector. Production of particles and antiparticles in quark jets was compared, allowing the first direct observation of leading particles in e{sup +}e{sup {minus}} {r_arrow} u{anti u}, d{anti d}, s{anti s} events. More high momentum baryons and K{sup {minus}}`s than antibaryons and K{sup +}`s were observed, providing evidence for leading baryon and kaon production, as well as for strangeness suppression at high momentum.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 491605
- Report Number(s):
- SLAC-PUB-7384; CONF-960765-63; ON: DE97006460; TRN: 97:012570
- Resource Relation:
- Conference: 28. international conference on high-energy physics, Warsaw (Poland), 25-31 Jul 1996; Other Information: PBD: Oct 1996
- Country of Publication:
- United States
- Language:
- English
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