Physics Results from Sld Using the Crid

We review recent Z physics results from SLD that use the Cherenkov Ring Imaging Detector for charged particle identi cation. The performance of the detector and likelihood method are described brie y. Several hadronization measurements are presented, including identi ed hadron production in events of di erent primary avors, leading hadron production, and new correlation studies sensitive to details of both leading and nonleading hadron production. Identi ed K have been used in conjunction with precision vertexing to study charmless and doubly charmed B-hadron decays. This combination has also been used to tag b, b, c and c jets, yielding precise measurements of BB mixing and of the asymmetric couplings Ab and Ac. Identi ed K and / have been used to tag s and s jets, yielding a measurement of As. The clean identi ed particle samples provided e ciently by the CRID allow the purities of these tags to be measured from the data, an essential ingredient for precision physics. Presented at the 3 rd International Workshop on Ring Imaging Cherenkov Detectors, 15{20 November 1998, Ein-Gedi, Israel. Work supported in part by Department of Energy contract DE-AC03-76SF00515.