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 — preprints:1995:ttp95-20 [2016/03/15 20:39] (current) Line 1: Line 1: + ====== TTP95-20 Three-loop QCD Corrections to \delta\rho, \DELTA r and \Delta\kappa ====== + + + QCD corrections to electroweak observables are reviewed. Recent results + on contributions from the top-bottom doublet + of ${\cal O}(\as^2)$ to $\drho$, $\Delta r$ and $\Delta\kappa$ are presented. + It is demonstrated that the first three terms + in the expansion in $M_Z^2/​M_t^2$ provide an excellent approximation to + the exact result. + ​Calculational techniques are briefly discussed. + ​ + |**K.G. Chetyrkin, J.H. Kuehn, M. Steinhauser** ​ | + |**     ​Proceedings of the Workshop "​Perspectives for Electroweak Interactions in e+e- Collisions",​ B. A. Kniehl, ed., World Scientific 1995, pp. 97-108 For conference proceedings. **  | + | {{preprints:​1995:​ttp95-20.pdf|PDF}} {{preprints:​1995:​ttp95-20.ps|PostScript}} ​  | + | |