Abstract
The time dependence of B meson oscillations is studied using hadronic Z0 decays with identified leptons in both thrust hemispheres. Decay times are reconstructed for each of the semileptonic B decays by forming vertices which include the lepton and by estimating the B meson momentum. The mass difference of the two mass eigenstates in the B 0d system, Δm d, is measured to be\(0.462_{ - 0.053 - 0.035}^{ + 0.040 + 0.052} ps^{ - 1}\), where the first error is statistical and the second systematic. For the B 0s system, a lower limit of Δm s >2.2 ps−1 at 95% C.L. is derived.
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OPAL Collaboration., Akers, R., Alexander, G. et al. A study of B meson oscillations using dilepton events. Z. Phys. C - Particles and Fields 66, 555–565 (1995). https://doi.org/10.1007/BF01579630
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DOI: https://doi.org/10.1007/BF01579630