Higgs pair production at NNLO

TL;DR

This paper discusses progress in calculating NNLO virtual corrections for Higgs pair production via gluon fusion, aiming to improve accuracy over previous large-top-mass approximations.

Contribution

It introduces a new method to estimate three-loop virtual corrections in a broader phase space region beyond existing large-mass expansions.

Findings

Progress in NNLO virtual correction calculations

Enhanced phase space coverage for Higgs pair production

Improved uncertainty estimates for theoretical predictions

Abstract

In this talk I report on progress towards the computation of the next-to-next-to-leading order virtual corrections to Higgs boson pair production in gluon fusion, in an expansion around the forward-scattering limit. The results of this computation will provide an estimate of the size and uncertainty of the three-loop virtual corrections in a comparatively much larger region of phase space than the results available in the literature, which are based on an expansion in the limit of a large top quark mass.