Next-to-Next-to-Leading Order QCD Corrections to Higgs Boson Pair Production

TL;DR

This paper calculates the Higgs boson pair production cross section at NNLO in QCD, showing a significant increase over previous predictions and reduced theoretical uncertainties, within the large top-mass approximation.

Contribution

It provides the first NNLO QCD corrections to Higgs pair production cross section using the large top-mass approximation, improving accuracy over prior NLO results.

Findings

Cross section increases by about 20% at NNLO

Reduced scale dependence improves theoretical precision

Results normalized with full top- and bottom-mass dependence at LO

Abstract

We present the Higgs boson pair production cross section at next-to-next-to-leading order in QCD within the large top-mass approximation. Numerical results for the LHC are provided, finding an increase of O(20%) with respect to the previous order prediction and a substantial reduction in the scale dependence. We normalize our results using the full top- and bottom-mass dependence at leading order.