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

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

2011-10-04

arxiv.org/abs/1110.0869v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 5 figures

Scientific paper

I am commenting on the recent paper Gastmans, Wu and Wu about a new calculation of the H --> gamma gamma rate mediated by the W boson loop, and the lack of decoupling of the heavy states which mediate the decay. We remind the reader that the heavy Higgs limit is dominated by the contribution from the longitudinal W bosons, which in the limit m_H >> M_W are represented by the charged Higgs ghosts according to the equivalence theorem. The corresponding contribution is missing in Gastmans, Wu and Wu.

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