Preliminary measurement of leading particle effects in hadronic Z{sup 0} decays

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We present preliminary evidence for leading particle production in hadronic decays of the Z{sup 0} to light quark pairs using 150,000 events recorded in the SLD experiment at SLAC. The highly polarized electron beam produced by the SLC is used to tag quark and antiquark jets, and a signed impact parameter technique is employed to reject heavy flavor events. Charged hadrons are identified in the SLD Cherenkov Ring Imaging Detector (CRID) and {Lambda}/{bar {Lambda}} are reconstructed using their charged decay modes. In a high purity sample of quark jets, the baryon momentum spectrum is harder that that of the antibaryon, ... continued below

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16 p.

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The SLD Collaboration June 1, 1996.

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We present preliminary evidence for leading particle production in hadronic decays of the Z{sup 0} to light quark pairs using 150,000 events recorded in the SLD experiment at SLAC. The highly polarized electron beam produced by the SLC is used to tag quark and antiquark jets, and a signed impact parameter technique is employed to reject heavy flavor events. Charged hadrons are identified in the SLD Cherenkov Ring Imaging Detector (CRID) and {Lambda}/{bar {Lambda}} are reconstructed using their charged decay modes. In a high purity sample of quark jets, the baryon momentum spectrum is harder that that of the antibaryon, and conversely for a sample of antiquark jets, supporting the hypothesis that the faster particles in jets are more likely to carry the primary quark or antiquark from the Z{sup 0} decay. Similarly, more high momentum K{sup -} that K{sup +} are observed in quark jets and conversely for antiquark jets, consistent with the hypothesis that leading K{sup {+-}} are produced predominantly in s{bar s} events rather than {ital u}{bar {ital u}} events.

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16 p.

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INIS; OSTI as DE96014139

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  • 28. international conference on high-energy physics, Warsaw (Poland), 25-31 Jul 1996

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  • Other: DE96014139
  • Report No.: SLAC-PUB--7197
  • Report No.: CONF-960765--11
  • Grant Number: FG02-91ER40676;FG03-91ER40618;FG03-92ER40689;FG03-93ER40788;FG02-91ER40672;FG02-91ER40677;AC03-76SF00098;FG02-92ER40715;AC02-76ER03069;FG06-85ER40224;AC03-76SF00515;FG05-91ER40627;FG02-95ER40896;FG02-92ER40704
  • Office of Scientific & Technical Information Report Number: 282094
  • Archival Resource Key: ark:/67531/metadc668590

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  • June 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • June 27, 2016, 1:06 p.m.

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The SLD Collaboration. Preliminary measurement of leading particle effects in hadronic Z{sup 0} decays, article, June 1, 1996; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc668590/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.