The Higgs resonance shape in gluon fusion: heavy Higgs effects Original Research Article

We study the influence of two-loop radiative corrections of enhanced electroweak strength on Higgs production at the LHC. We consider Higgs production by the gluon fusion mechanism, with the subsequent decay of the Higgs boson into a pair of Z bosons, and incorporate the resonance shape corrections up to the order (g2mH2/mW2)2. We take into account the full gg → ZZ process and the qq → ZZ background, as well as the subsequent decay of the Z pair into leptons. We also discuss the theoretical uncertainty related to the use of the equivalence theorem in this process.