PreprintarXiv licencearXiv
Two-loop QCD contribution to the quark-initiated production of a top-antitop quark pair and a Higgs boson at the LHC
Abstract
We present the first direct computation of the two-loop QCD virtual corrections to the production of a top-antitop quark pair in association with a Higgs boson (tt̅H) at the LHC. We focus on the quark-antiquark channel and perform the calculation in the generalised leading-colour approximation. We combine state-of-the-art numerical methods for multiloop calculations with machine learning techniques to construct a surrogate amplitude suitable for accurate cross section computations. We compare our numerical results with those previously obtained using dynamical approximations of the two-loop amplitude, finding agreement within their respective uncertainties.
Related
- Investigating bottom quark effects in Higgs boson pair production
- Top-Quark Mass Scheme Uncertainties in Higgs Boson Pair Production via Gluon Fusion
- Study of enhancing the signal-background separation for the Higgs boson production in association with a single top-quark in pp collisions at the LHC
- Top-Quark Pair Production and Decay in Extended Higgs Sectors
- Evidence for the dead-cone effect in bottom quark initiated jets produced in proton-proton collisions at √s = 13 TeV
BibTeX
@misc{chen2026twoloop,
title = {{Two-loop QCD contribution to the quark-initiated production of a top-antitop quark pair and a Higgs boson at the LHC}},
author = {Xiang Chen and Massimiliano Grazzini and Stefan Kallweit},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.40266},
eprint = {2610.40266},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.40266},
}
RIS
TY - UNPB
TI - Two-loop QCD contribution to the quark-initiated production of a top-antitop quark pair and a Higgs boson at the LHC
AU - Xiang Chen
AU - Massimiliano Grazzini
AU - Stefan Kallweit
PY - 2026
DA - 2026/10/29
PB - arXiv
DO - 10.48550/arxiv.2610.40266
UR - https://arxiv.org/abs/2610.40266
AB - We present the first direct computation of the two-loop QCD virtual corrections to the production of a top-antitop quark pair in association with a Higgs boson (tt̅H) at the LHC. We focus on the quark-antiquark channel and perform the calculation in the generalised leading-colour approximation. We combine state-of-the-art numerical methods for multiloop calculations with machine learning techniques to construct a surrogate amplitude suitable for accurate cross section computations. We compare our numerical results with those previously obtained using dynamical approximations of the two-loop amplitude, finding agreement within their respective uncertainties.
ER -