Complete two-loop corrections to H - gamma gamma

摘要

In this Letter the complete two-loop corrections to the Higgs-boson decay, H -> gamma gamma, are presented. The evaluations of both QCD and electroweak corrections are based on a numerical approach. The results cover all kinematical regions, including the WW normal-threshold, by introducing complex masses in the relevant (gauge-invariant) parts of the LO and NLO amplitudes. (C) 2007 Elsevier B.V. All rights reserved.