Measurement of Leading Particle Effects in Decays of Z0 Bosons into Light Flavors

Abstract

We present evidence for leading particle production in hadronic decays of the Z0 boson to light-flavor jets. A polarized electron beam was used to tag quark and antiquark jets, and a vertex detector was employed to reject heavy-flavor events. Charged hadrons were identified with a Cherenkov ring imaging detector. In the quark jets, more high-momentum p, Lambda, K-, and anti-K*0 were observed than their antiparticles, and vice versa for antiquark jets, providing direct evidence that the higher-momentum particles in jets are more likely to carry the primary quark or antiquark from the Z0 decay, and that s-s(bar) production is suppressed in fragmentation.

8 pages LaTeX and 2 encapsulated postscript figures, submitted to Physical Review Letters

Cited by in corpus (9)

• Fragmentation Functions from Flavour-inclusive and Flavour-tagged e^+e^- Annihilations
• Production of pi+, K+, K0, K*0, phi, p and Lambda-0 in Hadronic Z0 Decays
• Production of charged pions, kaons and protons in e+e- annihilations into hadrons at sqrt{s} = 10.54 GeV
• Production of pi+, pi-, K+, K-, p and p-bar in Light (uds), c and b Jets from Z0 Decays
• Measurement of the ratio of the $p\bar{p}\to W$+$c$-jet cross section to the inclusive $p\bar{p}\to W$+jets cross section
• Light Quark Fragmentation in Polarized Z0 Decays at SLD
• Physics Results from SLD Using the CRID
• Extraction of Polarized Gluon Distributions from Large-pt Light Hadron Pair Production
• Spin Physics at e^+e^- Colliders