A study of Bs0 meson oscillation using hadronic Z0 decays containing leptons
The OPAL Collaboration
G.Abbiendi - et al.
2 Dipartimento di Fisica dell' Università di Bologna and INFN,
40126 Bologna, Italy
Received: 21 June 1999 / Published online: 28 September 1999
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 Bs0 oscillations. The flavour (b or ) 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 Bs0 oscillation frequency ps-1 at the 95% confidence level.