TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCommRep.12
TI  - Theoretical modeling of QCD radiation in off-shell Higgs production through gluon fusion
PY  - 2025/09/04
UR  - https://www.scipost.org/SciPostPhysCommRep.12
JF  - SciPost Physics Community Reports
JA  - SciPost Phys. Comm. Rep.
SP  - 12
A1  - Coelho Lopes de Sa, Rafael
AU  - Javurkova, Martina
AU  - Lazzeretti, Matteo
AU  - Röntsch, Raoul
AB  - The measurement of the Higgs boson width is a critical test of the Standard Model, with significant implications for understanding electroweak symmetry breaking. Direct measurements are limited by detector resolution, but it can be measured with greater precision through a combined analysis of on-shell and off-shell Higgs boson production. While results for on-shell production have been computed to a very high accuracy, theoretical predictions for off-shell Higgs boson production are not as well controlled due to the breakdown of the heavy-top approximation and the large interference with non-resonant amplitudes. Seeking to understand and improve the theoretical control, we compare leading-order and next-to-leading-order plus parton shower differential cross-sections for signal, background, and full physical processes in off-shell Higgs boson production at the Large Hadron Collider, using Powheg, MadGraph, and Sherpa. We analyze the impact of higher-order quantum chromodynamics effects and theoretical uncertainties, highlighting differences between predictions using jet merging with parton showers, and those from next-to-leading order computations matched to parton showers. The results provide insights for improving theoretical predictions and their application to experimental measurements in the future.
ER  -

@Article{10.21468/SciPostPhysCommRep.12,
	title={{Theoretical modeling of QCD radiation in off-shell Higgs production through gluon fusion}},
	author={Rafael Coelho Lopes de Sá and Martina Javurkova and Matteo Lazzeretti and Raoul Röntsch},
	journal={SciPost Phys. Comm. Rep.},
	pages={12},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCommRep.12},
	url={https://scipost.org/10.21468/SciPostPhysCommRep.12},
}