Institute for Theoretical Particle Physics (TTP)


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preprints:1995:ttp95-20 [2016/03/15 20:39] (current)
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 +====== TTP95-20 Three-loop QCD Corrections to \delta\rho, \DELTA r and \Delta\kappa ====== 
 +<hidden 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. 
 + </hidden> 
 +|**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}} {{|PostScript}}   | 
 +| |