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  • Open Access

Complete Next-to-Leading-Order Standard-Model-Effective-Field-Theory Electroweak Corrections to Higgs Decays

Luigi Bellafronte1,*, Sally Dawson2,†, Clara Del Pio2,‡, Matthew Forslund2,3,§, and Pier Paolo Giardino4,∥

  • *Contact author: lbellafronte@fsu.edu
  • †Contact author: dawson@bnl.gov
  • ‡Contact author: cdelpio@bnl.gov
  • §Contact author: mforslund@princeton.edu
  • ∥Contact author: pier.giardino@uam.es
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Phys. Rev. Lett. 136, 051801 – Published 4 February, 2026

DOI: https://doi.org/10.1103/2wqp-5zfm

Abstract

Precise predictions for Higgs decays are a crucial ingredient of the search for beyond the standard model physics and the standard model effective field theory (SMEFT) is a valuable tool for quantifying deviations from the standard model. We present the complete set of predictions for the two- and three-body Higgs decays at next-to-leading order, considering QCD and electroweak corrections and including all contributions from the dimension-6 SMEFT operators and with an arbitrary flavor structure. Including the next-to-leading-order SMEFT results for Higgs decays greatly increases the sensitivity to beyond the standard model physics of the e+e−→Zh process at FCC-ee, as compared with that obtained using only the total cross section.

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Phys. Rev. Lett. 136, 051801– Published 4 February, 2026
  • Received 2 September 2025
  • Revised 25 November 2025
  • Accepted 18 December 2025
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