Radiative Corrections to $H^0\to WW\mathrm{/}ZZ$ in the MSSM

The electroweak $\mathcal{O}(\alpha )$ radiative corrections to the decay of the heavy CP-even MSSM Higgs boson to weak gauge bosons are presented. Due to the suppression of the tree-level $H^{0}WW\mathrm{/}{H}^{0}ZZ$ coupling, the electroweak contributions to the partial decay width are significant. Although the effective Born decay width can be rather small for certain $M_{A^0}$ values (especially for large $\tan \beta$), the corrected partial widths at different values of $M_{A^0}$ are of comparable size.