Measurement of the B+ and B0 Lifetimes using Topological Vertexing at SLD

1999/07/27 by K. Abe, The SLD Collaboration, Abe, K.
Computer Science · Medicine · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Medical Imaging Techniques and Applications #Particle physics theoretical and experimental studies

paper · pdf · doi:10.48550/arxiv.hep-ex/9907051

openalex publication_date 1999/07/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The lifetimes of B+ and B0 mesons have been measured using the entire sample of 550,000 hadronic Z0 decays collected by the SLD experiment at the SLC between 1993 and 1998. In this paper, we describe the inclusive analysis of the 350,000 hadronic Z0 decays collected in 1997-98 with the upgraded SLD vertex detector. In this data period, a high statistics sample of 30903 (20731) charged (neutral) vertices with good charge purity is obtained. The charge purity is enhanced by using the vertex mass, the SLC electron beam polarization (73% for 1997-8) and an opposite hemisphere jet charge technique. Combining the results of this data sample with the results from the earlier data yield the following preliminary values: τ_B⁺=1.623±0.020(stat)±0.034(syst) ps, τ_B⁰=1.589±0.021(stat)±0.043(syst) ps, τ_B⁺/τ_B⁰ = 1.037±^0.025_0.024(stat) ±0.024(syst).

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