[SLAC] [SLAC Pubs and Reports]

SLAC-PUB-8155
Study of the Structure of e+e- ---> b anti-bg Events and Improved Limits on the Anomalous Chromomagnetic Coupling of the b-Quark

Abstract

The structure of e+e---->b anti-bg 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, and compared with perturbative QCD predictions. The energy distribution is potentially sensitive to an anomalous b chromomagnetic moment kappa small, Greek. We measured kappa small, Greek to be consistent with zero and set limits on its value, -0.11 < kappa small, Greek < 0.08 at 95% c.l. (preliminary).

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