Mapping the SMEFT at high-energy colliders: from LEP and the (HL-)LHC to the FCC-ee

Eugenia Celada; Tommaso Giani; Jaco ter Hoeve; Luca Mantani; Juan Rojo; Alejo N. Rossia; Marion O.A. Thomas; Eleni Vryonidou

doi:10.1007/JHEP09(2024)091

Mapping the SMEFT at high-energy colliders: from LEP and the (HL-)LHC to the FCC-ee

Eugenia Celada, Tommaso Giani, Jaco ter Hoeve^*, Luca Mantani, Juan Rojo, Alejo N. Rossia, Marion O.A. Thomas, Eleni Vryonidou

^*Corresponding author for this work

(Astro)-Particles Physics

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

Abstract

We present SMEFiT3.0, an updated global SMEFT analysis of Higgs, top quark, and diboson production data from the LHC complemented by electroweak precision observables (EWPOs) from LEP and SLD. We consider recent inclusive and differential measurements from the LHC Run II, alongside with a novel implementation of the EWPOs based on independent calculations of the relevant EFT contributions. We estimate the impact of HL-LHC measurements on the SMEFT parameter space when added on top of SMEFiT3.0, through dedicated projections extrapolating from Run II data. We quantify the significant constraints that measurements from two proposed high-energy circular e⁺e⁻ colliders, the FCC-ee and the CEPC, would impose on both the SMEFT parameter space and on representative UV-complete models. Our analysis considers projections for the FCC-ee and the CEPC based on the latest running scenarios and includes Z-pole EWPOs, fermion-pair, Higgs, diboson, and top quark production, using optimal observables for both the W⁺W⁻ and the tt¯ channels. The framework presented in this work may be extended to other future colliders and running scenarios, providing timely input to ongoing studies towards future high-energy particle physics facilities.

Original language	English
Article number	91
Pages (from-to)	1-83
Number of pages	83
Journal	Journal of High Energy Physics
Volume	2024
Issue number	9
Early online date	17 Sept 2024
DOIs	https://doi.org/10.1007/JHEP09(2024)091
Publication status	Published - Sept 2024

Bibliographical note

Publisher Copyright:
© The Author(s) 2024.

Funding

We are grateful to M. Bakker for collaboration in initial stages of this work. We acknowledge useful discussions with R. Balasubramanian, J. de Blas, I. Brivio, G. Durieux, C. Grojean, F. Maltoni, K. Mimasu, V. Miralles, C. Severi, and M. Vos. The work of E.C., A.R., M.T. and E.V. is supported by the European Research Council (ERC) under the European Union\u2019s Horizon 2020 research and innovation programme (Grant agreement No. 949451) and by a Royal Society University Research Fellowship through grant URF/R1/201553. The work of L.M. is supported by the European Research Council under the European Union\u2019s Horizon 2020 research and innovation Programme (grant agreement n.950246). The work of J.t.H. and T.G. is supported by the Dutch Research Council (NWO). The work of J.R. is supported by the Dutch Research Council (NWO) and by the Netherlands eScience Center.

Funders	Funder number
European Research Council
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Horizon 2020 Framework Programme	950246, 949451
Royal Society	URF/R1/201553

Keywords

Electroweak Precision Physics
SMEFT

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title = "Mapping the SMEFT at high-energy colliders: from LEP and the (HL-)LHC to the FCC-ee",

abstract = "We present SMEFiT3.0, an updated global SMEFT analysis of Higgs, top quark, and diboson production data from the LHC complemented by electroweak precision observables (EWPOs) from LEP and SLD. We consider recent inclusive and differential measurements from the LHC Run II, alongside with a novel implementation of the EWPOs based on independent calculations of the relevant EFT contributions. We estimate the impact of HL-LHC measurements on the SMEFT parameter space when added on top of SMEFiT3.0, through dedicated projections extrapolating from Run II data. We quantify the significant constraints that measurements from two proposed high-energy circular e+e− colliders, the FCC-ee and the CEPC, would impose on both the SMEFT parameter space and on representative UV-complete models. Our analysis considers projections for the FCC-ee and the CEPC based on the latest running scenarios and includes Z-pole EWPOs, fermion-pair, Higgs, diboson, and top quark production, using optimal observables for both the W+W− and the tt¯ channels. The framework presented in this work may be extended to other future colliders and running scenarios, providing timely input to ongoing studies towards future high-energy particle physics facilities.",

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Mapping the SMEFT at high-energy colliders: from LEP and the (HL-)LHC to the FCC-ee

Abstract

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Keywords

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