The final SLD results for ALR and Alepton

Details The final SLD results for ALR and Alepton The final SLD results for ALR and Alepton

2001-02-09

arxiv.org/abs/hep-ex/0102021v1

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages 4 figures Latex, Contribution to ICHEP2000

Scientific paper

We present the final measurements of the left-right cross-section asymmetry (ALR) for Z boson production by e+e- collisions and Z boson-lepton coupling asymmetry parameters Ae, Amu, and Atau in leptonic Z decays with the SLD detector at the SLAC Linear Collider. Using the complete sample of polarized Z bosons collected at SLD, we get ALR = 0.15056 +- 0.00239, Ae = 0.1544 +- 0.0060, Amu = 0.142 +- 0.015, and Atau = 0.136 +- 0.015. The ALR=Ae and Ae results are combined and we find Ae = 0.1516 +- 0.0021. Assuming lepton universality, we obtain a combined effective weak mixing angle of sin 2 theta eff W = 0.23098 +- 0.00026. Within the context of the SM, our result prefers a light Higgs mass.

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