Measurement of the Probability of Gluon Splitting into Charmed Quarks in Hadronic Z Decays

Details Measurement of the Probability of Gluon Splitting into Charmed Quarks in Hadronic Z Decays Measurement of the Probability of Gluon Splitting into Charmed Quarks in Hadronic Z Decays

1999-11-12

arxiv.org/abs/hep-ex/9911016v1

Phys.Lett.B476:243-255,2000

Physics

High Energy Physics

High Energy Physics - Experiment

Scientific paper

10.1016/S0370-2693(00)00163-5

We have measured the probability, n(g->cc~), of a gluon splitting into a charm-quark pair using 1.7 million hadronic Z decays collected by the L3 detector. Two independent methods have been applied to events with a three-jet topology. One method relies on tagging charmed hadrons by identifying a lepton in the lowest energy jet. The other method uses a neural network based on global event shape parameters. Combining both methods, we measure n(g->cc~)= [2.45 +/- 0.29 +/- 0.53]%.

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