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Matching HEFT and SMEFT in double and triple Higgs boson production from weak boson fusion

D. Domenech1,*, M. Herrero1,†, R. A. Morales2,‡, and A. Salas-Bernárdez3,§

  • *Contact author: daniel.domenech@uam.es
  • †Contact author: maria.herrero@uam.es
  • ‡Contact author: roberto.morales@fisica.unlp.edu.ar
  • §Contact author: alexsala@ucm.es
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Phys. Rev. D 112, 115022 – Published 10 December, 2025

DOI: https://doi.org/10.1103/qmz3-38b7

Abstract

In this work, we study the matching between the two most popular effective field theories for beyond standard model Higgs physics, SMEFT and HEFT. To perform this matching, we follow the approach of identifying the corresponding scattering amplitudes for physical processes in both theories, instead of the most usual approach of relating the corresponding effective Lagrangians or effective actions. In this work, we focus on the physical processes of double and triple Higgs production from weak boson fusion, in particular WW→HH, ZZ→HH, WW→HHH, and ZZ→HHH and complement them with the elastic scattering HH→HH. We present here the analytical solution to this matching in terms of relations among the coefficients in both theories and comment on the most relevant phenomenological implications of such relations for collider physics.

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Phys. Rev. D 112, 115022– Published 10 December, 2025
  • Received 4 July 2025
  • Accepted 27 October 2025
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