Impact of NLO EW and QCD corrections to dimension-6 SMEFT coefficients constraints in Higgs decays

Year: 2026

Type: preprint

Abstract: This paper presents the impact of the inclusion of next-to-leading-order (NLO) QCD and electroweak (EW) corrections for dimension-6 Standard Model Effective Field Theory (SMEFT) predictions for the Higgs decays in Higgs couplings measurements at the Large Hadron Collider. Such higher-order corrections will be increasingly important for the precise Higgs and electroweak measurements expected at the High-Luminosity Large Hadron Collider (HL-LHC). The results are compared with a SMEFT parameterisation employing inputs from a previous ATLAS study, in which the dimension-6 SMEFT contributions are evaluated for each production and decay process at the lowest non-vanishing perturbative QCD order of the corresponding SM process. The effects of the SMEFT NLO QCD/EW contributions to the Higgs decay channels are largest for 2-fermion operators involving the third generation. The sensitivity to the Higgs tri-linear coupling is also explored.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2608.28464

Authors: Bellafronte, Luigi, Gómez, Ana Rosario Cueto, Dawson, Sally, Del Pio, Clara, Forslund, Matthew, Giardino, Pier Paolo, Visibile, Andrea

Institutions: Florida State University, Universidad Autónoma de Madrid, Brookhaven National Laboratory, Princeton University, Stockholm University, Instituto de Física Teórica

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Florida State University, European Commission, Knut och Alice Wallenbergs Stiftelse, Vetenskapsrådet, HORIZON EUROPE Framework Programme, Agencia Estatal de Investigación

OpenAlex ID: W7204503349