Radiative corrections to Higgs-boson decays in the Weinberg-Salam model

One-loop corrections to the Higgs-boson decays $H{\tau }^{+}{\tau }^{-}$, $H{W}^{+}{W}^{-}$, and $\mathrm{HZZ}$ are calculated up to Higgs-boson masses of about 1 TeV. The corrections are of the order of 10% for $200 \mathrm{GeV}\lesssim m_H\lesssim 1 \mathrm{TeV}$ within the renormalization scheme adopted. Renormalization problems are discussed in detail. A complete set of one-loop counterterms in the 't Hooft gauge is presented.