Title of article
Study of the Bs0Bs0 oscillation frequency using Ds− ℓ+ combinations in Z decays
Author/Authors
ALEPH Collaboration، نويسنده , , D. Buskulic، 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 , , M.P. Casado، نويسنده , , M. Chmeissani، نويسنده , , J.M. Crespo، نويسنده , , M. Delfino، نويسنده , , I. Efthymiopoulos، نويسنده , , E. Fernandez، نويسنده , , M. Fernandez-Bosman، نويسنده , , Ll. Garrido، نويسنده , , A. Juste، نويسنده , , et al.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 1996
Pages
17
From page
205
To page
221
Abstract
A lower limit on the oscillation frequency of the Bs0Bs0 system is obtained from approximately four million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1995. Leptons are combined with opposite sign Ds− candidates reconstructed in seven different decay modes as evidence of semileptonic Bs0 decays. Criteria designed to ensure precise proper time reconstruction select 277Ds−ℓ+ combinations. The initial state of these Bs0 candidates is determined using an algorithm optimized to efficiently utilise the tagging information available for each event. The limit at 95% confidence level on the Bs0Bs0 oscillation frequency is Δms > 6.6 ps−1. The same data is used to update the measurement of the Bs0 lifetime,τs = 1.54−0.13+0.14 (stat) ± 0.04 (syst) ps.
Journal title
PHYSICS LETTERS B
Serial Year
1996
Journal title
PHYSICS LETTERS B
Record number
906535
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