QCD CORRECTIONS TO THE HZ-GAMMA COUPLING

The Z decay into Higgs plus photon Z --> H-gamma (for M(H) < M(Z)) and the rare Higgs decay mode H --> Z-gamma (for M(H) > m(Z)) are mediated by loops and can thus provide information on new particle spectra. To exploit this potential, the predictions of the standard model must be determined accurately. Besides W loops, the HZ-gamma-vertex is built up by heavy quark loops in the standard model. We present the QCD corrections to these processes which turn out to be of order alpha(s)/pi, and thus are well under control.