Yukawa coupling corrections to the decay H⁺ → W⁺ A⁰

We compute the fermionic radiative contributions to the decay H+ → W+(*) A0 in the framework of models with two Higgs doublets (2HDM), for the case of an on-shell and off-shell W. We show that, in the majority of the cases, current measurements of the ρ parameter suggest MH± ≥ MA and such decays could invalidate current charged Higgs searches or aid detection in the region MH± ≈ MW. We find that the radiative corrections may approach 50% for small values of tan β.