A Preliminary Study of the Structure of b-bbar-g Events using Z0 Decays

The structure of three-jet b-bbar-g events has been  studied using hadronic 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/bbar.  The remaining jet in each event was tagged as a gluon jet, and
distributions of the gluon energy and polar angle with  respect to the electron
beam were examined and were compared with  perturbative QCD predictions.  These
distributions are potentially  sensitive to an anomalous b chromomagnetic
moment.  We compare our data with theoretical predictions including such a
moment and discuss experimental limits.