Results on B0-B0 over bar 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.
Measurement of B-(B) over bar Mixing At the Z Using A Jet-charge Method
G. BATIGNANI;CIOCCI, MARIA AGNESE;FERRANTE, ISIDORO;FIDECARO, FRANCESCO;F. FORTI;MESSINEO, ALBERTO MARIA;TONELLI, GUIDO EMILIO;G. TRIGGIANI;
1992-01-01
Abstract
Results on B0-B0 over bar 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.File in questo prodotto:
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