2000/08/23 by The BABAR Collaboration, B. Aubert, Aubert, B.
Medicine · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Medical Imaging Techniques and Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.48550/arxiv.hep-ex/0008053
20 pages, 13 postscript figures, contributed paper to ICHEP2000
arxiv created 2000/08/23 · openalex publication_date 2000/08/23 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The two B0 decay processes B0 --> D*-pi+ and B0 --> D*-l+nu have been studied by means of a partial reconstruction technique using a data sample collected with the BABAR detector at the PEP-II storage ring. To increase statistics, only the soft pi- from the decay D*- --> pi-D0 was used in association with either an oppositely-charged high-momentum pion or lepton. Events were then identified by exploiting the constraints from the simple kinematics of Y(4S) decays. A clear signature is obtained in each case. The position of the B0 decay point was obtained from the reconstructed pi+(l+)pi- vertex. The position of the other anti-B0 in the event was also determined. Taking advantage of the boost given to the Y(4S) system by the asymmetric beam energies of PEP-II, the lifetime of the B0 meson has been measured from the separation distance between the two vertices along the beam direction. The preliminary results are tauB0 = 1.55+/-0.05+/-0.07 ps, tauB0 = 1.62+/-0.02+/-0.09 ps, respectively for the B0 --> D*-pi+ and B0 --> D*-l+nu channels.