Abstract
This paper reports a study of B meson oscillations using hadronic Z0 decays with two identified leptons, and updates a previous publication by including data collected in 1994. 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, Δm d, between the two mass eigenstates in the B0d system is measured to be 0.430 ± 0.043 +0.028 −0.030 ps.1, where the first error is statistical and the second error is systematic. For the B0 s system, a lower limit of Δms < 2.2 ps.1 is obtained at 95% C.L.
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OPAL Collaboration. An updated study of B meson oscillations using dilepton events. Z Phys C - Particles and Fields 76, 417–423 (1997). https://doi.org/10.1007/s002880050565
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DOI: https://doi.org/10.1007/s002880050565