Virtual corrections to /gg-->H to two loops in the heavy top limit

Abstract The virtual corrections to the production cross section of a Standard Model Higgs boson are computed up to order α s 4 . Using an effective Lagrangian for the limit M t →∞, we evaluate the relevant massless two-loop vertex diagrams by mapping them onto three-loop two-point functions, following a method recently introduced by Baikov and Smirnov [1] . As a result, we find a gauge-invariant contribution to the total Higgs production cross section at NNLO.