Abstract
We discuss the τ polarization measurement at SLC/LEP energies as a data point in the precision tests of the Glashow-Salam-Weinberg model. Theoretical and experimental uncertainties of this measurement are examined and it is concluded that apart from left-right asymmetry measurement, and for typical values of the parameters of the Standard Model, the τ polarization offers the best probe of the couplings of leptons to the Z0. In particular, the dependence of the τ polarization on the top and Higgs masses is discussed. The interplay of QED initial state bremsstrahlung and other classes of radiative corrections is also discussed.
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Boillot, F., Was, Z. Uncertainties in τ polarization measurement at SLC/LEP and QED/electroweak radiative corrections. Z. Phys. C - Particles and Fields 43, 109–116 (1989). https://doi.org/10.1007/BF02430616
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DOI: https://doi.org/10.1007/BF02430616