Study of the Bs0s0 oscillation frequency using Ds− ℓ+ combinations in Z decays

Buskulic, D. and Finch, Alexander (1996) Study of the Bs0s0 oscillation frequency using Ds− ℓ+ combinations in Z decays. Physics Letters B, 377 (1-3). pp. 205-221. ISSN 0370-2693

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Abstract

A lower limit on the oscillation frequency of the Bs0s0 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 Bs0s0 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.

Item Type: Journal Article
Journal or Publication Title: Physics Letters B
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 64052
Deposited By: ep_importer_pure
Deposited On: 14 May 2013 14:02
Refereed?: Yes
Published?: Published
Last Modified: 30 Sep 2019 17:25
URI: https://eprints.lancs.ac.uk/id/eprint/64052

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