A study of charm production in beauty decays with the OPAL detector at LEP

G Abbiendi, Georgios Anagnostou, Paul Bell, David Charlton, Christopher Hawkes, Predrag Jovanovic, Thomas McMahon, Stephen O'Neale, Miriam Watson, Peter Watkins, Alan Watson, Nigel Watson, John Wilson

Research output: Contribution to journalArticle

Abstract

The branching ratio of beauty hadrons to final states containing two charm hadrons, Br(b-->D (D) over barX), has been measured using an inclusive method in hadronic Z(0) decays with the OPAL detector at LEP. The impact parameter significance of tracks opposite tagged b-jets is used to differentiate b-->D (D) over barX decays from other decays. The result is Br(b-->D (D) over barX) = (10.0 +/- 3.2 (stat.)(-2.9)(+2.4)(det.)(-9.0)(+10.4) (phys.))%, where "det." is the systematic uncertainty due to the modelling of the detector, and "phys." is the systematic uncertainty due to the modelling of the underlying physics. Using this result, the average number of charm plus anti-charm quarks produced in a beauty quark decay, n(c), is found to be 1.12(-0.10)(+0.11).
Original languageEnglish
Pages (from-to)149-158
Number of pages10
JournalEuropean Physical Journal C
Volume35
Issue number2
DOIs
Publication statusPublished - 1 Jun 2004

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