====== TTP93-12 Leading Top Mass Corrections of Order ${\cal O}(\alpha\as m_t^2/M_W^2)$ to the Partial Decay Rate $\Gamma(Z\rightarrow b\bar{b})$ ======
 
 
<hidden TTP93-12  Leading Top Mass Corrections of Order ${\cal O}(\alpha\as m_t^2/M_W^2)$ to the Partial Decay Rate $\Gamma(Z\rightarrow b\bar{b})$ > The order ${\cal O} (\alpha\as m_t^2/M_W^2)$ corrections to the
 partial decay rate of $\Gamma(Z\rightarrow b\bar{b})$ are computed
 using the heavy top mass expansion. They are given by the absorptive
 part of the corresponding three loop $Z$-self energy diagrams.  Our
 method provides an independent way to calculate the QCD corrections to
 the electroweak one loop result for $\Gamma(Z\rightarrow b\bar{b})$
 and our result represents another confirmation of the one recently
 published by Fleischer et al.
 </hidden>
|**K.G. Chetyrkin, A. Kwiatkowski, and M. Steinhauser**  | 
|** Mod. Phys. Lett. A8 2785-2792 1993  **  |
| {{preprints:1993:ttp93-12.pdf|PDF}} {{preprints:1993:ttp93-12.ps|PostScript}}   |
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