====== TTP97-52 Corrections of O(\alpha\alpha_s) to the Decay of the Z Boson into Bottom Quarks ====== For the vertex corrections to the partial decay rate $\Gamma(Z\to b\bar{b})$ involving the top quark only the leading terms of order $\alpha\alpha_s$ in the $1/M_t$ expansion are known. In this work we compute the missing next-to-leading corrections. They turn out to be equally important as the leading term and therefore have to be included into an ${\cal O}(\alpha\alpha_s)$ analysis to arrive at reliable predictions. |**R. Harlander, T. Seidensticker and M. Steinhauser** | |** Phys. Lett. B 426 125-132 1998 ** | | {{preprints:1997:ttp97-52.pdf|PDF}} {{preprints:1997:ttp97-52.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9712228|arXiv]] | | |