Tests of QCD using Heavy Flavors in e+e-->Z0 at SLD

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We present preliminary results on three SLD analyses: the gluon energy spectrum in 3-jet b{bar b}g events, the rate of g {r_arrow} b{bar b}, and the b fragmentation function in Z{sup 0} decays. The gluon energy spectrum, measured over the full kinematic range, is compared with perturbative QCD predictions. We set new 95% C.L. limits on the anomalous chromomagnetic coupling of the b quark: {minus}0.09 < {kappa} < 0.06. g{sub b{bar b}} is measured to be (3.07 {+-} 0.71 (stat) {+-} 0.66 (syst)) x 10{sup {minus}3}. The inclusive B hadron energy distribution is measured for the first time over the ... continued below

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10 pages

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Dong, Danning May 25, 1999.

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Description

We present preliminary results on three SLD analyses: the gluon energy spectrum in 3-jet b{bar b}g events, the rate of g {r_arrow} b{bar b}, and the b fragmentation function in Z{sup 0} decays. The gluon energy spectrum, measured over the full kinematic range, is compared with perturbative QCD predictions. We set new 95% C.L. limits on the anomalous chromomagnetic coupling of the b quark: {minus}0.09 < {kappa} < 0.06. g{sub b{bar b}} is measured to be (3.07 {+-} 0.71 (stat) {+-} 0.66 (syst)) x 10{sup {minus}3}. The inclusive B hadron energy distribution is measured for the first time over the full kinematic range, using a novel B hadron energy reconstruction technique. Several models of b fragmentation including JETSET + Peterson are excluded by the data. The average scaled B hadron energy of the weakly decaying B hadron is measured to be x{sub B} = 0.713 {+-} 0.005 (stat) {+-} 0.007 (syst) {+-} 0.002 (model). All three measurements take advantage of the small and stable SLC interaction point as well as the excellent vertexing and tracking capabilities of the upgraded CCD-pixel vertex detector.

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10 pages

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  • Other Information: PBD: 25 May 1999

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  • Report No.: SLAC-PUB-8150
  • Grant Number: AC03-76SF00515
  • DOI: 10.2172/10081 | External Link
  • Office of Scientific & Technical Information Report Number: 10081
  • Archival Resource Key: ark:/67531/metadc627419

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • May 25, 1999

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 5, 2016, 7:13 p.m.

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Dong, Danning. Tests of QCD using Heavy Flavors in e+e-->Z0 at SLD, report, May 25, 1999; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc627419/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.