Author

M. Grazzini

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Preprint Oct 2026

Two-loop QCD contribution to the quark-initiated production of a top-antitop quark pair and a Higgs boson at the LHC

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 ($t\bar{t}H$) at the LHC. We focus on the quark-antiquark channel and perform the calculation in the generalised leading-colour approximation. We combine state-...

Xiang Chen, M. Grazzini, S. Kallweit · 0 citations

Preprint Sep 2026

Higgs Boson Pair Production via Gluon Fusion: Higher-Order Corrections and Theoretical Uncertainties

In this contribution, the higher-order QCD and electroweak corrections to Standard Model Higgs boson pair production via the gluon-fusion mechanism, $gg\to hh$, are summarized and the different sources of theoretical uncertainty are assessed. The discussion includes finite top quark mass effects, matching to parton sho...

H. AjjathA, S. Alioli, E. Bagnaschi et al. · 1 citation · ⚡1

Preprint Aug 2026

NNLO QCD corrections to $WW\gamma$ production at the LHC

Triboson production processes are crucial to study quartic gauge-boson couplings. We present the computation of the radiative corrections to $WW\gamma$ production at the next-to-next-to-leading order (NNLO) in QCD. The leptonic decays of the $W$ bosons and off-shell effects are fully included. The calculation is exact,...

Paolo Garbarino, M. Grazzini, S. Kallweit · 0 citations