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Complete two-loop corrections to H → γγ
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DOI：10.1016/j.physletb.2007.09.002.png)
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Abstract
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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.
Keywords:
Feynman diagrams
multi-loop calculations
Higgs physics
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