Title of article
Measurement of the Bs0 lifetime and production rate with Ds−ℓ+ combinations in Z decays
Author/Authors
ALEPH Collaboration، نويسنده , , D Buskulic، نويسنده , , D Casper، نويسنده , , I De Bonis، نويسنده , , D Decamp، نويسنده , , P Ghez، نويسنده , , C Goy، نويسنده , , J.-P Lees، نويسنده , , A Lucotte، نويسنده , , M.-N Minard، نويسنده , , P Odier، نويسنده , , B Pietrzyk، نويسنده , , F. Ariztizabal، نويسنده , , M. Chmeissani، نويسنده , , J.M. Crespo، نويسنده , , I Efthymiopoulos، نويسنده , , E Fernandez، نويسنده , , M. Fernandez-Bosman، نويسنده , , V Gaitan، نويسنده , , Ll. Garrido، نويسنده , , et al.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 1995
Pages
13
From page
221
To page
233
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) %.
Keywords
LHC
Journal title
PHYSICS LETTERS B
Serial Year
1995
Journal title
PHYSICS LETTERS B
Record number
905792
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