Asymmetry of Lambda Baryons in Hadronic Z^0 Decays

Abstract

The longitudinal polarization, the transverse polarization, and the forward-backward asymmetry of Lambda baryons have been measured using a sample of 4.34 million hadronic Z^0 decays collected with the OPAL detector at LEP between 1990 and 1995. These results are important as an aid to the understanding of hadronization mechanisms. Significant longitudinal polarization has been observed at intermediate and high momentum. For x_E = 2 E_{Lambda}/\sqrt{s}) > 0.3, the longitudinal polarization has been measured to be -32.9 +/- 5.5(stat) +/- 5.2(syst)%. We have observed no transverse polarization. A significant forward-backward asymmetry has been measured and can be described by a JETSET model.

22 pages, LaTeX, uses a4p.sty, 5 eps figures included, submitted to Zeit. Phys. C

References in corpus (1)

• Measurement of the Branching Fractions and Forward-Backward Asymmetries of the Z^0 into Light Quarks

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