Unitarity limits on HH production from VBF mediated channels
Abstract
In this work we study the unitarity constraints on double Higgs production from Vector Boson Fusion mediated channels, specifically in f1 f2 → f3 f4 H5 H6 scattering, where f refers generically to either fermion or anti-fermion, and both cases with quarks and leptons will be considered. We focus on the beyond Standard Model contributions from anomalous quartic couplings of two electroweak gauge bosons and two Higgs bosons (VVHH with VV=WW, ZZ) from effective operators containing four derivatives. These four derivative operators appear in the two most popular effective field theories, SMEFT (at canonical dimension 8) and HEFT (at chiral dimension 4), and their corresponding VVHH effective vertices can be easily related for the considered processes here. The aim of this work is to derive jointly the unitarity constraints on these related effective vertices using the peculiarities of the VBF mediated channels with four particles in the final state while keeping the propagation of the internal VV pairs being off-shell as it must be for these channels. We also discuss the relevance of the obtained constraints for f1 f2 → f3 f4 H5 H6 at high energy colliders.
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BibTeX
@misc{dobado2026unitarity,
title = {{Unitarity limits on HH production from VBF mediated channels}},
author = {A. Dobado and D. Domenech and M. Herrero and R. A. Morales},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.07194},
eprint = {2610.07194},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.07194},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Unitarity limits on HH production from VBF mediated channels
AU - A. Dobado
AU - D. Domenech
AU - M. Herrero
AU - R. A. Morales
PY - 2026
DA - 2026/10/15
PB - arXiv
DO - 10.48550/arxiv.2610.07194
UR - https://arxiv.org/abs/2610.07194
AB - In this work we study the unitarity constraints on double Higgs production from Vector Boson Fusion mediated channels, specifically in f_1 f_2 → f_3 f_4 H_5 H_6 scattering, where f refers generically to either fermion or anti-fermion, and both cases with quarks and leptons will be considered. We focus on the beyond Standard Model contributions from anomalous quartic couplings of two electroweak gauge bosons and two Higgs bosons (VVHH with VV=WW, ZZ) from effective operators containing four derivatives. These four derivative operators appear in the two most popular effective field theories, SMEFT (at canonical dimension 8) and HEFT (at chiral dimension 4), and their corresponding VVHH effective vertices can be easily related for the considered processes here. The aim of this work is to derive jointly the unitarity constraints on these related effective vertices using the peculiarities of the VBF mediated channels with four particles in the final state while keeping the propagation of the internal VV pairs being off-shell as it must be for these channels. We also discuss the relevance of the obtained constraints for f_1 f_2 → f_3 f_4 H_5 H_6 at high energy colliders.
ER -