Measurements of Parity-Violation Parameters at SLD

Abstract

We present direct measurements of the parity-violation parameters $A_b$, $A_c$, and $A_s$ at the $Z^0$ resonance with the SLD detector. The measurements are based on approximately 530k hadronic $Z^0$ events collected in 1993-98. Obtained results are $A_b=0.914\pm 0.024$ (SLD combined: preliminary), $A_c=0.635\pm 0.027$ (SLD combined: preliminary), and $A_s=0.895\pm 0.066(stat.)\pm 0.062(sys.)$.

8 pages 2 figures Latex, Contribution to ICHEP2000