PS03 CP Violation
Towards CP-violation results from DØ
NIKHEF, Dutch Institute for Nuclear and High-Energy Physics, P.O. Box 41882, 1009DB Amsterdam, The Netherlands
Accepted: 15 October 2003
Published online: 22 October 2003
We have made a preliminary study of a dimuon sample corresponding to 114 pb–1 of data taken in Run II at the Tevatron. From this sample we have selected 157 ± 20 B d → J/ψ K S 0 and 133 ± 17 B s → J/ψ φ decays. In a subset of the data we have measured the B ± lifetime in the J/ψ K ± channel to be . We have implemented a jet-charge initial-flavor tag as well as a soft-muon tag, and we have measured the respective tagging powers to be (2.4 ± 1.7)% and (3.3 ± 1.8)%. Our conclusion from these studies is that we have made good progress towards understanding all ingredients required to make CP violation measurements in the B d and B s systems.
© Società Italiana di Fisica, Springer-Verlag, 2004