Asymmetry of Lambda Baryons in Hadronic Z^0 Decays
Loading...
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
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
22 pages, LaTeX, uses a4p.sty, 5 eps figures included, submitted to Zeit. Phys. C