Measurement of the Probability for Gluon Splitting into b{bar b} in Z{sup 0} Decays

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We present a preliminary measurement of the rate of gluon splitting into bottom quarks, g {r_arrow} b{bar b}, in hadronic Z{sup 0} decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavor. 4-jet events were identified, and a topological vertex-mass technique was applied to each jet in order to identify b or {bar b} jets. The upgraded CCD based vertex detector gives very high B-tagging efficiency, especially for B hadrons of the low energies typical of this process. The two most nearly collinear b/{bar b} ... continued below

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16 pages

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Muller, David July 9, 1999.

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We present a preliminary measurement of the rate of gluon splitting into bottom quarks, g {r_arrow} b{bar b}, in hadronic Z{sup 0} decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavor. 4-jet events were identified, and a topological vertex-mass technique was applied to each jet in order to identify b or {bar b} jets. The upgraded CCD based vertex detector gives very high B-tagging efficiency, especially for B hadrons of the low energies typical of this process. The two most nearly collinear b/{bar b} jets were tagged as originating from g {r_arrow} b{bar b}. We measured the rate of secondary b/{bar b} production per hadronic event, g{sub b{bar b}}, to be (3.07 {+-} 0.71(stat.) {+-} 0.66(syst.)) x 10{sup {minus}3} (preliminary).

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16 pages

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  • Other Information: PBD: 9 Jul 1999

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  • Report No.: SLAC-PUB-8157
  • Grant Number: AC03-76SF00515
  • DOI: 10.2172/10087 | External Link
  • Office of Scientific & Technical Information Report Number: 10087
  • Archival Resource Key: ark:/67531/metadc626855

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  • July 9, 1999

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 5, 2016, 7:04 p.m.

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Muller, David. Measurement of the Probability for Gluon Splitting into b{bar b} in Z{sup 0} Decays, report, July 9, 1999; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc626855/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.