Search for Bs Oscillations at CDF II
- Conference date: 23-30 October 2005
- Location: Santa Fe, New Mexico (USA)
We report updated results in the search for Bs flavor oscillations performed at CDF II. We analyze a dataset of approximately 355 pb−1 from proton‐antiproton collisions at a center‐of‐mass energy of 1.96 TeV collected in 2002–2004 with the CDF II detector at the Tevatron Collider. Samples of both fully reconstructed Bs → Ds (3)π, and partially reconstructed, Bs → Ds l X, decays have been studied. A combination of opposite side tagging algorithms has been used to determine the flavor of the Bs mesons at production time. Information about the oscillation frequency of the system, Δms , is obtained by performing an amplitude scan of the data, from which an exclusion limit , with a measured sensitivity of 13.0 ps−1 has been derived; Combination with previously available measurements increases the world exclusion limit from 14.5 ps−1 to 16.6 ps−1 (@ 95% C.L.).
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