1999/08/03 by K. Abe, The SLD Collaboration, Abe, K.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex
paper · pdf · doi:10.48550/arxiv.hep-ex/9908006
18 pages, 1 figure, Latex. Paper contributed to Lepton-Photon Symposium 1999
arxiv created 1999/08/03 · arxiv updated 2009/11/30
We report new direct measurements of the Z0-lepton coupling asymmetry parameters Ae, Aμ and Aτ, with polarized Z0's collected by the SLD detector at the SLAC Linear Collider. The parameters are extracted from the measurement of the left-right-forward-backward asymmetries for each lepton species. The 1996, 1997 and 1998 SLD runs are included in this analysis and combined with published data from the 1993-95 runs. Preliminary results are Ae = 0.1558 ± 0.0064, Aμ=0.137 ± 0.016 and Aτ=0.142 ± 0.016. If lepton universality is assumed, a combined asymmetry parameter Al = 0.1523 ± 0.0057 results. This translates into an effective weak mixing angle sin2θeffW = 0.23085 ± 0.00073 at the Z0 resonance.