Time Dependent B 0 s − B 0 s Oscillations Using Exclusively

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We set a preliminary 95% C.L. exclusion on the oscillation frequency of B 0 s − B 0 s mixing using a sample of 400,000 hadronic Z 0 decays collected by the SLD experiment at the SLC during the 1996-98 run. In this analysis, B 0 s mesons are partially reconstructed by combining a fully reconstructed D s with other B 0 s decay tracks. The D s decays are reconstructed via the φπ and K * K channels. The b-hadron flavor at production is determined by exploiting the large forward-backward asymmetry of polarized Z 0 → bb decays as well as information from the hemisphere opposite to the reconstructed B decay. The flavor of the B 0 s at the decay vertex is determined by the charge of the D s. A total of 361 candidates passed the final event selection cuts. This analysis excludes the following values of the B

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تاریخ انتشار 2000