The Higgs Self-Coupling at FCC-ee
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866908321702739968 |
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| author | Maura, Victor Stefanek, Ben A. You, Tevong |
| author_facet | Maura, Victor Stefanek, Ben A. You, Tevong |
| contents | 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 $δκ_λ$ 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 $δκ_λ$ 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 $δκ_λ$ can exceed that of the HL-LHC. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_13719 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The Higgs Self-Coupling at FCC-ee Maura, Victor Stefanek, Ben A. You, Tevong High Energy Physics - Phenomenology High Energy Physics - Experiment 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 $δκ_λ$ 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 $δκ_λ$ 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 $δκ_λ$ can exceed that of the HL-LHC. |
| title | The Higgs Self-Coupling at FCC-ee |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2503.13719 |