Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2000-02-08
Eur.Phys.J.C16:41-60,2000
Physics
High Energy Physics
High Energy Physics - Experiment
34 pages, 8 figures, submitted to Eur. Phys. J. C
Scientific paper
10.1007/s100520050002
The cross-section ratio Rb=sigma(e+e- to b-antib)/sigma(e+e- to q-antiq) and the bottom and charm forward-backward asymmetries AFB^b and AFB^c are measured using event samples collected by the OPAL detector at centre-of-mass energies between 130 and 189 GeV. Events with bottom quark production are selected with a secondary vertex tag, and a hemisphere charge algorithm is used to extract AFB^b. In addition, the bottom and charm asymmetries are measured using leptons from semileptonic decays of heavy hadrons and pions from D*+ to D0pi+ decays. The results are in agreement with the Standard Model predictions.
Abbiendi Giovanni
collaboration The OPAL
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