QCD radiative corrections to Higgs boson production at the Tevatron and the LHC

We consider Higgs boson production, through gluon fusion, in hadron collisions at the Tevatron and the LHC. We briefly summarize the calculations of QCD radiative corrections to this process. We show theoretical predictions for the total cross section and the transverse-momentum (qT ) distribution of the Standard Model (SM) Higgs boson. The perturbative QCD uncertainty on these predictions is discussed.