B Meson Lifetime & Dmd
OPAL
Comparison of systematic errors: LEP t: B momentum
Babar t: z recon
Babar Dm: Misid (B+ & cascade)
Belle Dm: B+ contamination
*from cd = 0.198 ± 0.013 ± 0.014
assuming: DG = 0
using tBo = 1.55 ps
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