TTP96-33 An estimate of the QCD corrections to the decay <EM> Z --> W u d </EM>

Z –> W u d </EM> > We present an estimate of perturbative QCD corrections to the decay $Z \to Wu\bar d$. A simple approximate approach is described in detail. The difference of masses of $M_Z$ and $M_W$ is used as an expansion parameter. A complete analytical formula for a part of the corrections is also presented.