Complete three-loop QCD corrections to the decay H -> γ γ

Abstract

We present the result for the three-loop singlet QCD corrections to the decay of a Higgs boson into two photons and improve the calculation for the non-singlet case. With the new result presented, the decay width Gamma(H -> γ γ) is completely known at O(GF α 2 αs2, GF α 3).

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