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Measurement of f(c→D∗+X), f(b→D∗+X) and Γcc¯/Γhad using D∗± mesons

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • OPAL Collaboration
<mark>Journal publication date</mark>02/1998
<mark>Journal</mark>European Physical Journal C: Particles and Fields
Issue number3
Number of pages21
Pages (from-to)439-459
Publication StatusPublished
<mark>Original language</mark>English


The production rates of D∗±D∗± mesons in charm and bottom events at centre-of-mass energies of about 91 GeV and the partial width of primary cc¯cc¯ pairs in hadronic Z0Z0 decays have been measured at LEP using almost 4.4 million hadronic Z0Z0 decays collected with the OPAL detector between 1990 and 1995. Using a combination of several charm quark tagging methods based on fully and partially reconstructed D∗±D∗± mesons, and a bottom tag based on identified muons and electrons, the hadronisation fractions of charm and bottom quarks into D∗±D∗± mesons have been found to be The fraction of cc¯cc¯ events in hadronic Z0Z0 decays, Γcc¯/Γhad=Γ(Z0→cc¯)/Γ(Z0→hadrons)Γcc¯/Γhad=Γ(Z0→cc¯)/Γ(Z0→hadrons) , is determined to be In all cases the first error is statistical, and the second one systematic. The last error quoted for Γcc¯/ΓhadΓcc¯/Γhad is due to external branching ratios.