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+ | ====== TTP95-13 QCD Corrections from Top Quark to Relations | ||
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+ | < | ||
+ | gauge bosons which arise from top and bottom quark loops lead to | ||
+ | | ||
+ | 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 $M_Z^2/ | ||
+ | The first three terms of the Taylor series of $\Pi(q^2)$ are | ||
+ | | ||
+ | The first two are required to derive the approximation, | ||
+ | third can be used to demonstrate the smallness of the neglected terms. | ||
+ | The paper | ||
+ | | ||
+ | based on the leading term $\propto G_F M_t^2 \as^2$. | ||
+ | | ||
+ | | ||
+ | </ | ||
+ | |**K.G. Chetyrkin, J.H. Kuehn, M. Steinhauser** | ||
+ | |** Phys. Rev. Lett. 75 3394-3397 1995 ** | | ||
+ | | {{preprints: | ||
+ | | | |