Simultaneous Measurement of the B0 Meson Lifetime and Mixing Frequency with B0 --> D*- l+ nu Decays
| dc.creator | the BABAR Collaboration | |
| dc.creator | Aubert, B. | |
| dc.date | 2002-12-06 | |
| dc.date.accessioned | 2026-07-07T12:01:53Z | |
| dc.date.available | 2026-07-07T12:01:53Z | |
| dc.description | We measure the B0 lifetime τ_{B0} and the B0-B0bar oscillation frequency Δm_d with a sample of approximately 14,000 exclusively reconstructed B0 --> D*- l+ nu signal events, selected from 23 million BBbar pairs recorded at the Υ(4S) 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 frequency 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 (Δt), the calculated uncertainty on Δt, the signal and background probabilities, and b-quark tagging information for the other B. The results are τ_{B^0} = (1.523^{+0.024}_{-0.023} \pm 0.022) \rm{ps} and Δm_d = (0.492 \pm 0.018 \pm 0.013) \rm{ps}^{-1}. The statistical correlation coefficient between τ_{B0} and Δm_d is -0.22. | |
| dc.description | 23 pages, 6 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0212017 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0212017 | |
| dc.identifier | Phys.Rev.D67:072002,2003 | |
| dc.identifier | doi:10.1103/PhysRevD.67.072002 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207248 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Simultaneous Measurement of the B0 Meson Lifetime and Mixing Frequency with B0 --> D*- l+ nu Decays | |
| dc.type | text |