Measurement of {Mathematical expression}using a double tagging method

OPAL Collaboration

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


The fraction of {Mathematical expression}; events in hadronic Z0 decays has been measured using the data collected by OPAL in 1992 and 1993. The presence of electrons or muons from semileptonic decays of bottom hadrons and the detection of bottom hadron decay vertices were used together to obtain an event sample enriched in {Mathematical expression} decays. To reduce the systematic error on the measurement of the {Mathematical expression} fraction, the efficiency of the {Mathematical expression} event tagging was obtained from the data by comparing the numbers of events having a bottom signature in either one or both thrust hemispheres. A value of {Mathematical expression} was obtained, where the first error is statistical and the second systematic. The uncertainty on the decay width {Mathematical expression} is not included in these errors. A fractional variation of this width by ±8% about its Standard Model prediction would result in a variation of the measured {Mathematical expression} fraction of ±0.0015.

Original languageEnglish
Pages (from-to)17-30
Number of pages14
JournalEuropean Physical Journal C
Issue number1
StatePublished - 1 Mar 1994
Externally publishedYes

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)


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