Higgs Boson Pair Production at Next-to-Next-to-Leading Order in QCD

Understand

We compute the next-to-next-to-leading order QCD corrections for Standard Model Higgs boson pair production inclusive cross section at hadron colliders within the large top-mass approximation.

• We provide numerical results for the LHC, finding that the corrections are large, resulting in an increase of ${\cal O}(20%)$ with respect to the next-to-leading order result at c.m.
• energy $\sqrt{s_H}=14\,\text{TeV}$.
• We observe a substantial reduction in the scale dependence, with overlap between the current and previous order prediction.