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I am commenting on the paper Gastmans, Wu and Wu, which recently obtained newsupport by a paper by Christova and Todorov, about a new calculation of the H--> gamma gamma rate mediated by the W boson loop, and the lack of decouplingof the heavy states which mediate the decay. We remind the reader that theheavy Higgs limit is dominated by the contribution from the longitudinal Wbosons, which in the limit m_H >> M_W are represented by the charged Higgsghosts according to the equivalence theorem. The corresponding contribution ismissing in Gastmans, Wu and Wu as well as in the new paper by Christova andTodorov.

Comment on H --> gamma gamma and the role of the decoupling theorem and the equivalence theorem