Higher order and top mass effects in Higgs boson pair production beyond the Standard Model

TL;DR

This paper investigates how next-to-leading order QCD corrections and anomalous couplings influence Higgs boson pair production via gluon fusion, emphasizing the importance of top quark mass effects within an effective field theory framework.

Contribution

It provides a detailed analysis of NLO QCD corrections with full top mass dependence in Higgs pair production, within a non-linear effective field theory approach.

Findings

Significant non-homogeneous K-factors in many parameter regions

Full top mass dependence crucial for accurate cross section predictions

Impact of anomalous couplings on Higgs pair invariant mass distributions

Abstract

We discuss the interplay between NLO QCD corrections and anomalous couplings in Higgs boson pair production via gluon fusion, within the framework of a non-linearly realised Effective Field Theory, described by the electroweak chiral Lagrangian. We study how the NLO corrections with full top quark mass dependence affect the total cross sections as well as distributions in the Higgs boson pair invariant mass. For a large part of the parameter space, significant and non-homogeneous K-factors arise.