First study of the structure of e+e- -> b bbar g events and limits on the anomalous chromomagnetic moment of the b-quark

Details First study of the structure of e+e- -> b bbar g events and limits on the anomalous chromomagnetic moment of the b-quark First study of the structure of e+e- -> b bbar g events and limits on the anomalous chromomagnetic moment of the b-quark

1999-03-04

arxiv.org/abs/hep-ex/9903004v1

Phys.Rev.D60:092002,1999

Physics

High Energy Physics

High Energy Physics - Experiment

17 pages latex including 3 figures in eps format, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevD.60.092002

The structure of e+e- -> b bbar 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 bbar. 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 kappa. We measured kappa to be consistent with zero and set the first limits on its value, -0.17 < kappa < 0.11 at 95% c.l.

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