B lifetime measurements with exclusively reconstructed B decays
نویسنده
چکیده
Data collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC are used to measure the lifetimes of the B0 and B+ mesons. The data sample consists of 8.3 fb collected near the Υ (4S) resonance. B0 and B+ mesons are fully reconstructed in several exclusive hadronic decay modes to charm and charmonium final states. The B lifetimes are determined from the flight length difference between the two B mesons. The preliminary measurements of the lifetimes are τB0 = 1.506 ± 0.052 (stat) ± 0.029 (syst) ps, τB+ = 1.602 ± 0.049 (stat) ± 0.035 (syst) ps, and of their ratio is τB+/τB0 = 1.065 ± 0.044 (stat) ± 0.021 (syst). Contributed to the Proceedings of the DPF 2000 Meeting of the Division of Particles and Fields of the American Physical Society, 8/9/2000—8/12/2000, Columbus, Ohio Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309 Work supported in part by Department of Energy contract DE-AC03-76SF00515.
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