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Measurement of B - anti-B mixing at the Z using a jet charge method

Research output: Contribution to journalJournal article


  • ALEPH Collaboration
<mark>Journal publication date</mark>1992
<mark>Journal</mark>Physics Letters B
Issue number1-2
Number of pages14
Pages (from-to)177-190
<mark>Original language</mark>English


Results on B0−0 mixing in e+e− annihilation at LEP are reported. A new method is used, where the charge of one b quark is tagged by a high-p, high-p⊥ electron or muon, and the charge of the other is extracted from the momentum-weighted average of the charges of jet fragments. Based on the analysis of 180 000 hadronic Z decays produced in the ALEPH detector, is obtained. Combining this result with the ALEPH dipleton measurement yields χ=0.129±0.022.