Complete NLO SMEFT Electroweak Corrections to Higgs Decays
Abstract
Precise predictions for Higgs decays are a crucial ingredient of the search for beyond the Standard Model (BSM) physics and the Standard Model Effective Field Theory (SMEFT) is a valuable tool for quantifying deviations from the Standard Model (SM). We present the complete set of predictions for the 2- and 3- body Higgs decays at next-to-leading order (NLO), considering QCD and electroweak corrections and including all contributions from the dimension-6 SMEFT operators and with an arbitrary flavor structure. Including the NLO SMEFT results for Higgs decays greatly increases the sensitivity to BSM physics of the process at FCC-ee, as compared with that obtained using only the total cross section.
Cite
@article{arxiv.2508.14966,
title = {Complete NLO SMEFT Electroweak Corrections to Higgs Decays},
author = {Luigi Bellafronte and Sally Dawson and Clara Del Pio and Matthew Forslund and Pier Paolo Giardino},
journal= {arXiv preprint arXiv:2508.14966},
year = {2026}
}
Comments
6 pages, 4 figures; v3: version accepted in PRL, minor bug in bb channel corrected