# A measurement of the $B^{0}-\bar{B^0}$ oscillation frequency and determination of flavor-tagging efficiency using semileptonic and hadronic $B^{0}$ decays

Abstract : B^0-anti-B^0 flavor oscillations are studied in e^+e^- annihilation data collected with the BABAR detector at center-of-mass energies near the Y(4S) resonance. One B is reconstructed in a hadronic or semileptonic decay mode, and the flavor of the other B in the event is determined with a tagging algorithm that exploits the relation between the flavor of the heavy quark and the charges of its decay products. Tagging performance is characterized by an efficiency e_i and a probability for mis-identification, w_i, for each tagging category. We report a determination of the wrong-tag probabilities, w_i, and a preliminary result for the time-dependent B^0-anti-B^0 oscillation frequency, Delta_md = 0.512+/-0.017+/-0.022 hbar-ps^{-1}.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00010871
Contributor : Claudine Bombar <>
Submitted on : Tuesday, September 19, 2000 - 4:56:30 PM
Last modification on : Saturday, December 19, 2020 - 11:32:02 AM

### Citation

B. Aubert, A. Boucham, D. Boutigny, I. de Bonis, J. Favier, et al.. A measurement of the $B^{0}-\bar{B^0}$ oscillation frequency and determination of flavor-tagging efficiency using semileptonic and hadronic $B^{0}$ decays. International Conference on High-Energy Physics 30 ICHEP 2000, Jul 2000, Osaka, Japan. pp.1-21. ⟨in2p3-00010871⟩

Record views