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

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

1997-02-14

arxiv.org/abs/hep-ex/9702009v1

Phys.Rev.Lett.78:3442-3446,1997; Erratum-ibid.79:959,1997

Physics

High Energy Physics

High Energy Physics - Experiment

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

Scientific paper

10.1103/PhysRevLett.78.3442

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.

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