Abstract
We measure the lifetime and the oscillation frequency with a sample of approximately 14000 exclusively reconstructed signal events, selected from 23 million pairs recorded at the resonance with the BABAR detector at the Stanford Linear Accelerator Center. The decay position of the other B is determined with the remaining tracks in the event, and its b-quark flavor at the time of decay is determined with a tagging algorithm that exploits the correlation between the flavor of the b quark and the charges of its decay products. The lifetime and oscillation frequencies are measured simultaneously with an unbinned maximum-likelihood fit that uses, for each event, the measured difference in decay times of the two B mesons the calculated uncertainty on the signal and background probabilities, and b-quark tagging information for the other B. The results are and The statistical correlation coefficient between and is -0.22.
- Received 5 December 2002
DOI:https://doi.org/10.1103/PhysRevD.67.072002
©2003 American Physical Society