Tests of QCD using Heavy Flavors in e+e-->Z0 at SLD
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.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 10081
- Report Number(s):
- SLAC-PUB-8150; TRN: US0103345
- Resource Relation:
- Other Information: PBD: 25 May 1999
- Country of Publication:
- United States
- Language:
- English
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