Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1998-10-05
Nucl.Phys.Proc.Suppl.74:276-281,1999
Physics
High Energy Physics
High Energy Physics - Experiment
12 pages, 5 figures; to appear in proceedings of the XXIXth ICHEP, Vancouver, Canada
Scientific paper
10.1016/S0920-5632(99)00178-4
We present new studies of 3-jet final states from hadronic $Z^0$ decays recorded by the SLD experiment, in which jets are identified as quark, antiquark or gluon. Our gluon energy spectrum, measured over the full kinematic range, is consistent with the predictions of QCD, and we derive a limit on an anomalous chromomagnetic $bbg$ coupling. We measure the parity violation in $Z^0$ decays into $b\bar{b}g$ to be consistent with the predictions of electroweak theory and QCD, and perform new tests of T- and CP-conservation at the $bbg$ vertex. We also present a new technique for reconstructing the energy of a $B$ hadron using the set of charged tracks attached to a secondary vertex. The $B$ hadron energy spectrum is measured over the full kinematic range, allowing improved tests of predictions for the shape of the spectrum. The average scaled energy is measured to be $ = 0.719 \pm 0.005 (stat.)$ (Preliminary).
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