Measurement of Ds+ meson production in Z decays and of the Bs0 lifetime
Publication Type
Journal Article
Publication Date
1-1995
Abstract
The lifetime of the Bs0 meson is measured in approximately 3 million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1994. Seven different Ds− decay modes were reconstructed and combined with an opposite sign lepton as evidence of semileptonic Bs0 decays. Two hundred and eight Ds−ℓ+ candidates satisfy selection criteria designed to ensure precise proper time reconstruction and yield a measured Bs0 lifetime of τ(Bs0) = 1.59−0.15+0.17 (stat) ±0.03 (syst) ps. Using a larger, less constrained sample of events, the product branching ratio is measured to be Br(b→Bs0) ·Br(Bs0→Ds−ℓ+νX) = 0.82 ± 0.09 (stat) −0.14+0.13 (syst) %.
Discipline
Databases and Information Systems | Programming Languages and Compilers
Research Areas
Data Science and Engineering
Publication
Zeitschrift für Physik C Particles and Fields
Volume
69
Issue
1
First Page
585
Last Page
595
ISSN
0170-9739
Identifier
10.1007/BF02907442
Publisher
Springer Verlag (Germany)
Citation
1