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The Higgs Self-Coupling at FCC-ee

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arxiv 2503.13719 v3 pith:EYURU3C6 submitted 2025-03-17 hep-ph hep-ex

classification hep-phhep-ex
keywords fcc-eehiggsdeltaglobalkappalambdaself-couplingsensitivity
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Single Higgs production at FCC-ee probes the Higgs self-coupling at next-to-leading order (NLO). Extracting a bound requires a global analysis accounting for other possible new physics contributions up to NLO. We determine the FCC-ee sensitivity to Higgs self-coupling modifications $\delta\kappa_\lambda$ within the Standard Model Effective Field Theory (SMEFT) framework, including for the first time flavour, LEP, LHC, and FCC-ee observables in a global analysis with all leading NLO effects via one-loop renormalisation group evolution, as well as incorporating finite NLO contributions to electroweak precision and $ZH$ observables. The global sensitivity to $\delta\kappa_\lambda$ is estimated by marginalising over the effects of all other operators, bringing flavour considerations to the fore. We find that, under reasonable assumptions, FCC-ee sensitivity to $\delta\kappa_\lambda$ can exceed that of the HL-LHC.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The Dark Side of a Tera-Z Factory

    hep-ph 2025-07 conditional novelty 7.0 of 10

    Future Tera-Z runs at FCC-ee/CEPC could indirectly probe TeV-scale t-channel dark matter portals through one-loop and two-loop electroweak precision shifts, and in leptophilic models would be the only planned experime...

  2. Descoped and Upscoped FCC-ee Running Scenarios in the SMEFT

    hep-ph 2026-08 conditional novelty 6.0 of 10

    A descoped FCC-ee retains most of its SMEFT reach if a reduced-luminosity top-quark run is kept, while upscoped luminosity increases barely improve the global fit.

  3. Could electron-top interactions spoil the measurement of the Higgs trilinear? -A quantitative estimate at future lepton colliders-

    hep-ph 2025-12 conditional novelty 6.0 of 10

    Electron-top four-fermion operators are constrained by FCC-ee fermion-pair measurements strongly enough that they do not spoil the ~17% one-sigma extraction of the Higgs trilinear coupling.

  4. Measuring the trilinear Higgs self-coupling in Higgs boson pair production at multi-TeV muon colliders

    hep-ph 2026-08 conditional novelty 5.0 of 10

    In simulated muon-collider data, combining resolved and boosted Higgs pair events with machine learning yields a 68% confidence interval on the Higgs self-coupling modifier of 0.96 to 1.05 at 10 TeV.

  5. Cornering Natural SUSY at a Tera-$Z$ Factory

    hep-ph 2025-07 conditional novelty 4.0 of 10

    FCC-ee's Tera-Z electroweak precision program could probe natural supersymmetric particles up to multi-TeV masses, sometimes better than Higgs coupling measurements, assuming Standard Model theory uncertainties can be...

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