# QCD Corrections from Top Quark to Relations between Electroweak Parameters to Order α 2 s †

@inproceedings{Chetyrkin1995QCDCF, title={QCD Corrections from Top Quark to Relations between Electroweak Parameters to Order $\alpha$ 2 s †}, author={K. Chetyrkin and Johann H. K{\"u}hn and Matthias Steinhauser}, year={1995} }

The vacuum polarization functions Π(q2) of charged and neutral gauge bosons which arise from top and bottom quark loops lead to important shifts in relations between electroweak parameters which can be measured with ever-increasing precision. The large mass of the top quark allows approximation of these functions through the first two terms of an expansion in M2 Z/M 2 t . The first three terms of the Taylor series of Π(q2) are evaluated analytically up to order αs. The first two are required to… Expand

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