Hadron production in light and heavy, quark and antiquark jets

Conference · Thu Aug 01 04:00:00 EDT 1996

OSTI ID:634119

Baird, K G ^[1]

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1. Rutgers Univ., New Brunswick, NJ (United States). Dept. of Physics and Astronomy

The authors review four hadronization studies performed by the SLD experiment at SLAC, involving separation of light (Z{sup 0} {r_arrow} u{anti u}, d{anti d}, s{anti s}), c, and b flavors using precision vertexing, and separation of q- and {anti q}-jets using the highly polarized SLC electron beam. They measured the differences between the average charged multiplicities in Z{sup 0} {r_arrow} light, {r_arrow} c{anti c}, and {r_arrow}b{anti b} events, and found that the results were consistent with predictions of perturbative QCD. Next, they measured {pi}/{Kappa}/p/{Kappa}{sup 0}/{Lambda}{sup 0} production in light events for the first time, and compared with production in c- and b-flavor events. They then examined particle production differences in light quark and antiquark hemispheres, and observed more high momentum baryons and K{sup {minus}}`s than antibaryons and K{sup +}`s in quark hemispheres, consistent with the leading particle hypothesis. Lastly, they performed a search for jet handedness in light q- and {anti q}-jets. Assuming Standard Model values of quark polarization in Z{sup 0} decays, they have set an improved upper limit on the analyzing power of the handedness method.

• Research Organization: Stanford Linear Accelerator Center, CA (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 634119
• Report Number(s): SLAC-PUB--7271; CONF-960812--; ON: DE97009097; CNN: Grant NSF-PHY95-10439
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
HADRONIC PARTICLE DECAY
KAONS
LAMBDA PARTICLES
LEADING PARTICLES
PARTICLE PRODUCTION
PIONS
PROTONS
QUANTUM CHROMODYNAMICS
QUARKS
Z NEUTRAL BOSONS