Higgs trilinear coupling in the standard model effective field theory at the high luminosity LHC and the FCC-ee

Jaco ter Hoeve; Luca Mantani; Juan Rojo; Alejo N. Rossia; Eleni Vryonidou

doi:10.1103/qtz8-bkd4

Higgs trilinear coupling in the standard model effective field theory at the high luminosity LHC and the FCC-ee

Jaco ter Hoeve
, Luca Mantani
, Juan Rojo
, Alejo N. Rossia
, Eleni Vryonidou

(Astro)-Particles Physics

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

Motivated by the updated high luminosity (HL)-LHC projections for Higgs pair production from ATLAS and CMS and by the release of the FCC-ee feasibility study, we critically revisit the sensitivity of the global standard model effective field theory (SMEFT) analysis to deformations of the Higgs self-coupling modifier κ₃. To this end, we quantify the impact of SMEFT operators modifying double Higgs production at the LHC and single Higgs production, including loop corrections, at the FCC-ee, and include renormalization group evolution throughout. We demonstrate that significantly improving on the legacy HL-LHC constraints on κ₃ at the FCC-ee is not possible without the √s = 365 GeV run; that individual ffiffi and marginalized determinations are similar at the HL-LHC while differing by up to a factor 3 at the FCC-ee; and that quadratic EFT corrections cannot be neglected, especially at the (HL-)LHC. This finding fundamentally alters the picture compared to strategic planning often based on one-parameter projections. Overall, the combination of HL-LHC and FCC-ee data offers unique potential to pin down the Higgs self-coupling with ∼15% precision.

Original language	English
Article number	013008
Pages (from-to)	1-7
Number of pages	7
Journal	Physical Review D
Volume	112
Issue number	1
DOIs	https://doi.org/10.1103/qtz8-bkd4
Publication status	Published - 1 Jul 2025

Bibliographical note

Online published: 15 July 2025.

Publisher Copyright:
© 2025 American Physical Society

Funding

E. V. acknowledges helpful discussions with Gauthier Durieux and Fabio Maltoni. We are grateful to Freya Blekman, Valentina Cairo, and Pamela Ferrari for their input concerning di-Higgs measurements at the HL-LHC. A. N. R. and E. V. are supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 949451) and by a Royal Society University Research Fellowship through Grant No. URF/R1/201553. The work of A. N. R. is also supported by the University of Padua under the 2023 STARS Grants@Unipd program (Acronym and title of the project: HiggsPairs—Precise Theoretical Predictions for Higgs pair production at the LHC). A. N. R. acknowledges support from the COMETA COST Action CA22130 and the Mainz Institute for Theoretical Physics (MITP) of the Cluster of Excellence PRISMA+ (Project No. 390831469). L. M. acknowledges support from the European Union under the MSCA fellowship (Grant Agreement No. 101149078) Advancing global SMEFT fits in the LHC precision era (EFT4ward). The work of J. t. H. is supported by the UK Science and Technology Facility Council (STFC) consolidated Grant No. ST/X000494/1. The work of J. R. is supported by the Dutch Research Council (NWO) and by the Netherlands eScience Center. A. N. R. and E. V. are supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 949451) and by a Royal Society University Research Fellowship through Grant No. URF/R1/201553. The work of A. N. R. is also supported by the University of Padua under the 2023 STARS Grants@Unipd program (Acronym and title of the project: HiggsPairs—Precise Theoretical Predictions for Higgs pair production at the LHC). A. N. R. acknowledges support from the COMETA COST Action CA22130 and the Mainz Institute for Theoretical Physics (MITP) of the Cluster of Excellence PRISMA+ (Project No. 390831469). L. M. acknowledges support from the European Union under the MSCA fellowship (Grant Agreement No. 101149078) Advancing global SMEFT fits in the LHC precision era (EFT4ward). The work of J. t. H. is supported by the UK Science and Technology Facility Council (STFC) consolidated Grant No. ST/ X000494/1. The work of J. R. is supported by the Dutch Research Council (NWO) and by the Netherlands eScience Center.

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title = "Higgs trilinear coupling in the standard model effective field theory at the high luminosity LHC and the FCC-ee",

abstract = "Motivated by the updated high luminosity (HL)-LHC projections for Higgs pair production from ATLAS and CMS and by the release of the FCC-ee feasibility study, we critically revisit the sensitivity of the global standard model effective field theory (SMEFT) analysis to deformations of the Higgs self-coupling modifier κ3. To this end, we quantify the impact of SMEFT operators modifying double Higgs production at the LHC and single Higgs production, including loop corrections, at the FCC-ee, and include renormalization group evolution throughout. We demonstrate that significantly improving on the legacy HL-LHC constraints on κ3 at the FCC-ee is not possible without the √s = 365 GeV run; that individual ffiffi and marginalized determinations are similar at the HL-LHC while differing by up to a factor 3 at the FCC-ee; and that quadratic EFT corrections cannot be neglected, especially at the (HL-)LHC. This finding fundamentally alters the picture compared to strategic planning often based on one-parameter projections. Overall, the combination of HL-LHC and FCC-ee data offers unique potential to pin down the Higgs self-coupling with ∼15\% precision.",

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N2 - Motivated by the updated high luminosity (HL)-LHC projections for Higgs pair production from ATLAS and CMS and by the release of the FCC-ee feasibility study, we critically revisit the sensitivity of the global standard model effective field theory (SMEFT) analysis to deformations of the Higgs self-coupling modifier κ3. To this end, we quantify the impact of SMEFT operators modifying double Higgs production at the LHC and single Higgs production, including loop corrections, at the FCC-ee, and include renormalization group evolution throughout. We demonstrate that significantly improving on the legacy HL-LHC constraints on κ3 at the FCC-ee is not possible without the √s = 365 GeV run; that individual ffiffi and marginalized determinations are similar at the HL-LHC while differing by up to a factor 3 at the FCC-ee; and that quadratic EFT corrections cannot be neglected, especially at the (HL-)LHC. This finding fundamentally alters the picture compared to strategic planning often based on one-parameter projections. Overall, the combination of HL-LHC and FCC-ee data offers unique potential to pin down the Higgs self-coupling with ∼15% precision.

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Higgs trilinear coupling in the standard model effective field theory at the high luminosity LHC and the FCC-ee

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