We study inclusive double-Higgs boson production at the LHC and at the HL-LHC including variations of the trilinear and of the quartic Higgs boson self-couplings at next-to-leading order (NLO) in QCD with full top quark mass dependence. Our results include the two-loop contributions to the gg→HH amplitudes that involve a modified h4 vertex calculated in arXiv:1810.04665. We present results at 13, 13.6 and 14 TeV centre-of-mass energies. The implementation of the calculation is made publicly available in the POWHEG-BOX-V2 Monte Carlo framework.
@article{arxiv.2402.03463,
title = {Addendum to: Constraints on the quartic Higgs self-coupling from double-Higgs production at future hadron colliders},
author = {Wojciech Bizoń and Ulrich Haisch and Luca Rottoli and Zach Gillis and Brian Moser and Philipp Windischhofer},
journal= {arXiv preprint arXiv:2402.03463},
year = {2024}
}