Measurement of the Semileptonic Branching Ratio of Charm Hadrons Produced in Z to ccbar Decays

Details Measurement of the Semileptonic Branching Ratio of Charm Hadrons Produced in Z to ccbar Decays Measurement of the Semileptonic Branching Ratio of Charm Hadrons Produced in Z to ccbar Decays

1998-10-07

arxiv.org/abs/hep-ex/9810016v1

Eur.Phys.J.C8:573-584,1999

Physics

High Energy Physics

High Energy Physics - Experiment

22 pages, LaTeX, including 4 eps figures, submitted to European Physical Journal C

Scientific paper

10.1007/s100529900020

The inclusive charm hadron semileptonic branching fractions B(c to e) and B(c to mu) in Z to ccbar events have been determined using 4.4 million hadronic Z decays collected with the OPAL detector at LEP. A charm-enriched sample is obtained by selecting events with reconstructed D*+- mesons. Using leptons found in the hemisphere opposite that of the D*+- mesons, the semileptonic branching fractions of charm hadrons are measured to be B(c to e) = 0.103 +-0.009 +0.009 -0.008 and B(c to mu) = 0.090 +-0.007 +0.007 -0.006 where the first errors are in each case statistical and the others systematic. Combining these measurements, an inclusive semileptonic branching fraction of charm hadrons of B(c to l) = 0.095 +-0.006 +0.007 -0.006 is obtained.

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