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A study of B0s meson oscillation using hadronic Z0 decays containing leptons

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • OPAL Collaboration
<mark>Journal publication date</mark>12/1999
<mark>Journal</mark>European Physical Journal C: Particles and Fields
Issue number4
Number of pages12
Pages (from-to)587-598
Publication StatusPublished
<mark>Original language</mark>English


A sample of Z0 decays containing b-flavoured hadrons is tagged using leptons, and events having precise proper time measurements are selected. These events are used to study B0s oscillations. The flavour (b or b¯ ) at decay is determined from the lepton charge while the flavour at production is determined from jet charge or the charge of a second lepton, where available. The experiment was not able to resolve the oscillatory behaviour, and we deduce that the B0s oscillation frequency Δms>5.2 ps−1 at the 95% confidence level.