Electroweak Precision Measurements with Leptons

Details Electroweak Precision Measurements with Leptons Electroweak Precision Measurements with Leptons

1999-11-26

arxiv.org/abs/hep-ex/9911040v1

Physics

High Energy Physics

High Energy Physics - Experiment

presented at the `International Europhysics Conference On High-Energy Physics' (EPS-HEP 99), Tampere, Finland, July, 1999

Scientific paper

The precision measurements of lepton electroweak parameters at SLD and LEP are reviewed and discussed. The updated SLD weak mixing angle measurement from $A_{LR}$ and the lepton left-right forward-backward asymmetries is $\sin^2\theta_W^{eff} = 0.23099 \pm 0.00026$, and the combined SLD/LEP lepton-based value is $0.23119 \pm 0.00020$. This value differs by over $3\sigma$ from the comparable quark-based value.

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