Results on B0-BBAR0 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(perpendicular-to) 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 180000 hadronic Z decays produced in the ALEPH detector, f(d-chi-d) + 0.72f(s-chi-s) = 0.113 +/- 0.018 (stat.) +/- 0.027 (syst.) is obtained. Combining this result with the ALEPH dilepton measurement yields chi = 0.129 +/- 0.022.
|Titolo:||Measurement of B- overlineB mixing at the Z using a jet-charge method|
|Data di pubblicazione:||1992|
|Digital Object Identifier (DOI):||10.1016/0370-2693(92)91943-4|
|Appare nelle tipologie:||1.1 Articolo in rivista|