Measurement of B0B0 mixing in hadronic Z0 decays. OPAL collaboration

OPAL Collaboration

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23 Citations (Scopus)


From a sample of approximately 135 000 hadronic Z0 decays recorded with the OPAL detector, 1 536 events were selected with two lepton candidates, either electrons or muons. A signal for B0B0 mixing was observed using the sign of the lepton charge to tag the charge of the b quark in decaying b-flavoured hadrons. A flavour discriminating variable was constructed from the lepton momentum and its component perpendicular to the jet axis. By fitting the fraction of events in which the two lepton charges are of the same sign, as a function of this variable, the average mixing parameter was measured to be χ = 0.145+0.041 -0.035 ± 0.018, where the first error is statistical and the second is systematic.

Original languageEnglish
Pages (from-to)379-392
Number of pages14
JournalPhysics Letters B
Issue number3
Publication statusPublished - Feb 13 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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