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;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.
1992
Buskulic, D.; Decamp, D.; Goy, C.; Lees, J. P.; Minard, M. N.; Mours, B.; Alemany, R.; Ariztizabal, F.; Comas, P.; Crespo, J. M.; Delfino, M.; Fernand...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/828786
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