Measurement of the B Quark Fragmentation Function in Z{sup 0} Decays
We present preliminary results of a new measurement of the inclusive b quark fragmentation function in Z{sup 0} decays using a novel kinematic B hadron energy reconstruction technique. The measurement is performed using 150,000 hadronic Z{sup 0} events recorded in the SLD experiment at SLAC between 1996 and 1997. The small and stable SLC beam spot and the CCD-based vertex detector are used to reconstruct topological B-decay vertices with high efficiency and purity, and to provide precise measurements of the kinematic quantities used in this technique. We measure the B energy with good efficiency and resolution over the full kinematic range. We compare the measured scaled B hadron energy distribution with several functional forms of the B hadron energy distribution and predictions of several models of b quark fragmentation. Several functions are excluded by the data. The average scaled energy of the weakly decaying B hadron is measured to be x{sub B} = 0.714 {+-} 0.005 (stat) {+-} 0.007 (syst) {+-} 0.002 (model) (preliminary).
- 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:
- 10083
- Report Number(s):
- SLAC-PUB-8153; TRN: US0103400
- Resource Relation:
- Other Information: PBD: 9 Jul 1999
- Country of Publication:
- United States
- Language:
- English
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