The lifetime probability tag measurement of R{sub b} using the SLD

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The authors present a new measurement of R{sub b} = {Lambda}{sub Z{degree}{yields}b{anti b}}/{Lambda}{sub Z{degree}{yields}hadrons} using a lifetime double tag on 150k hadronic Z{degree} events collected from the SLD 1993 and 1994 runs. The method utilizes the high precision 3-D position measurements provided by the CCD vertex detector and the small stable SLC beams to obtain a b hemisphere tagging efficiency of 31% for a purity of 94%. The b-Hemisphere tagging efficiency is measured from the data reducing dependence on the B-decay model and detector simulation. They obtain a result of R{sub b} = 0.2171 {+-} 0.0040{sub statistical} {+-} 0.0037{sub systematic} ... continued below

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11 p.

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SLD Collaboration August 1, 1995.

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The authors present a new measurement of R{sub b} = {Lambda}{sub Z{degree}{yields}b{anti b}}/{Lambda}{sub Z{degree}{yields}hadrons} using a lifetime double tag on 150k hadronic Z{degree} events collected from the SLD 1993 and 1994 runs. The method utilizes the high precision 3-D position measurements provided by the CCD vertex detector and the small stable SLC beams to obtain a b hemisphere tagging efficiency of 31% for a purity of 94%. The b-Hemisphere tagging efficiency is measured from the data reducing dependence on the B-decay model and detector simulation. They obtain a result of R{sub b} = 0.2171 {+-} 0.0040{sub statistical} {+-} 0.0037{sub systematic} {+-} 0.0023{sub R{sub c}}.

Physical Description

11 p.

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INIS; OSTI as DE96001023

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  • HEP 95: international Europhysics conference on high-energy physics, Brussels (Belgium), 27 Jul - 2 Aug 1995

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  • Other: DE96001023
  • Report No.: SLAC-PUB--95-7004
  • Report No.: CONF-950705--17
  • Grant Number: FG02-91ER40676;FG03-92ER40701;FG03-91ER40618;FG03-92ER40689;FG03-93ER40788;FG02-91ER40672;FG02-91ER40677;AC03-76SF00098;FG02-92ER40715;AC02-76ER03069;FG06-85ER40224;AC03-76SF00515;FG05-91ER40627;AC02-76ER00881;FG02-92ER40704
  • Office of Scientific & Technical Information Report Number: 114004
  • Archival Resource Key: ark:/67531/metadc621974

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  • August 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Jan. 19, 2018, 1:22 p.m.

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SLD Collaboration. The lifetime probability tag measurement of R{sub b} using the SLD, article, August 1, 1995; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc621974/: accessed July 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.