Full top quark mass dependence in Higgs boson pair production at NLO

TL;DR

This paper calculates the complete top-quark mass effects on Higgs boson pair production at NLO, revealing significant differences from approximate methods and emphasizing the need for full calculations in collider predictions.

Contribution

It provides the first full NLO calculation including exact top-quark mass dependence for Higgs pair production, improving accuracy over previous approximations.

Findings

Approximate NLO methods differ from the full result by up to 50%.

Full NLO results are crucial for precise Higgs pair production predictions.

Analysis includes non-standard Higgs self-coupling scenarios.

Abstract

We study the effects of the exact top-quark mass dependent two-loop corrections to Higgs boson pair production by gluon fusion at the LHC and at a 100 TeV hadron collider. We perform a detailed comparison of the full next-to-leading order result to various approximations at the level of differential distributions and also analyse non-standard Higgs self-coupling scenarios. We find that the different next-to-leading order approximations differ from the full result by up to 50 percent in relevant differential distributions. This clearly stresses the importance of the full NLO result.