An improved direct measurement of leptonic coupling asymmetries with polarized Z bosons

Abstract

We present final measurements of the Z boson-lepton coupling asymmetry parameters Ae, Amu, and Atau with the complete sample of polarized Z bosons collected by the SLD detector at the SLAC Linear Collider. From the left-right production and decay polar angle asymmetries in leptonic Z decays we measure Ae = 0.1544 +- 0.0060, Amu = 0.142 +- 0.015, and Atau = 0.136 +- 0.015. Combined with our left-right asymmetry measured from hadronic decays, 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.

13 pages latex, including 1 figure. Submitted to Phys. Rev. Lett

References in corpus (5)

• Precise Measurement of the Left-Right Cross Section Asymmetry in $Z$ Boson Production by $\ee$ Collisions
• A High-Precision Measurement of the Left-Right Z Boson Cross-Section Asymmetry
• An Improved Measurement of the Left-Right Z0 Cross Section Asymmetry
• First Measurement of Leptonic Coupling Asymmetries with Polarized Z bosons
• Current Performance of the SLD VXD3

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