Author: Jorge P. Fernandez (University of California, Santa Cruz), representing the SLD Collaboration
Title: Measurements of $A_{LR}$, $A_{lepton}$ and $A_{b}$ from SLD
Abstract: We present the measurements of the leptonic asymmetries in $Z^0$ decays measured by the SLD experiment atSLAC. A data sample of approximately 550,000 $Z^0$ bosons are used for the preliminary measurement of$A_{LR}(A_{e})$ and the leptonic final state measurements of $A_{e}$, $A_{\mu}$ and $A_{\tau}$,representing the entire set of 1992-1998 SLD runs. When combining all results, a preliminary value for theeffective weak mixing angle is obtained: ${\sin}^2{\theta}_{W}^{eff} = 0.23109 \pm 0.00029$. We alsopresent the direct measurements of $A_{b}$ from left-right forward-backward asymmetries, using partial datasamples from 1993-1998 SLD runs. The preliminary value combines jet charge, cascade kaon and semileptonicdecay analyses to obtain $A_{b} = 0.866 \pm 0.036$.
Comments: 5 pages RevTex, 1 eps figure, Submitted to DPF99 Conference Proceedings, Parallel Sessions Talk 01-02Report-no: K. Abe et al., SLAC-PUB-8081