First Study of the Structure of e+e- → b$$\bar{b}$$ g Events and Limits on the Anomalous Chromomagnetic Couplings of the b-Quark
- SLAC National Accelerator Lab., Menlo Park, CA (United States); SLAC
The structure e+e- → b$$\bar{b}$$ g events was studied using Z0; decays recorded in the SLD experiment at SLAC. Three-jet final states were selected and the CCD-based vertex detector was used to identify two of the jets as b or anti-b. Distributions of the gluon energy and polar angle were measured over the full kinematic range for the first time, and compared with perturbative QCD predictions. The energy distribution is potentially sensitive to an anomalous b chromomagnetic moment κ. We measured κ to be consistent with zero and set the first limits on its value, -0.17 < κ < 0.11 at 95% c.1.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER)
- Contributing Organization:
- SLD Collaboration
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 9916
- Report Number(s):
- SLAC-PUB--7920; ON: DE00009916
- Country of Publication:
- United States
- Language:
- English
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