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

ALEPH Collaboration (1992) Measurement of B - anti-B mixing at the Z using a jet charge method. Physics Letters B, 284 (1-2). pp. 177-190. ISSN 0370-2693

Abstract

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.