The search for Bs0 oscillations at SLD

The SLD experiment at the SLAC Linear Collider has updated three searches for the time dependence of Bs0 oscillations. One search uses events with a reconstructed Ds meson; a second search uses events with a lepton and a topologically identified charmed meson; and the third uses events in which both a secondary and tertiary vertex are distinguished. The combined analyses are sensitive to values of Δms, the oscillation frequency, up to 13.0 ps−1. A preliminary maximum likelihood analysis excludes Δms<7.6 ps−1 and 11.8<Δms<14.8 ps−1 at 95% CL. Including this data, the combined world data now imply Δms>15.0 ps−1 at 95% CL, and are not incompatible with a signal near the expected value, Δms∼15 ps−1.