Journal article
A measurement of the Bd 0 oscillation frequency using leptons and D*± mesons
G Alexander, J Allison, N Altekamp, K Ametewee, KJ Anderson, S Anderson, S Arcelli, S Asai, D Axen, G Azuelos, AH Ball, E Barberio, RJ Barlow, R Bartoldus, JR Batley, G Beaudoin, J Bechtluft, C Beeston, T Behnke, AN Bell Show all
Zeitschrift Fur Physik C Particles and Fields | SPRINGER | Published : 1996
Abstract
Data collected with the OPAL detector during 1990-1994 are used to measure the time dependence of Bd 0↔B̄d 0 mixing. A sample of 348 D*± candidates with a lepton in the opposite hemisphere are reconstructed, of which 167 ± 25 are expected to be from Bd 0 decays. The Bd 0 oscillation frequency is measured to be Δmd = 0.567 ± 0.089(stat)-0.023 +0.029(syst) ps-1. A previously published analysis of Δmd using D*± and lepton candidates in the same hemisphere and jet charge is also updated with a larger data sample. From 1200 D*±ℓ∓ candidates, of which 778 ± 84 are expected to be from Bd 0 decays, we find a value of: Δmd = 0.539 ± 0.060(stat) ± 0.024(syst) ps-1. The combined result of these two ana..
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