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Indirect constraints on top quark operators from a global SMEFT analysis

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arxiv 2310.00047 v2 pith:PY6SJMCD submitted 2023-09-29 hep-ph

Francesco Garosi , David Marzocca , Antonio Rodríguez Sánchez , Alfredo Stanzione This is my paper · ORCID
classification hep-ph
keywords analysisconstraintsglobalmeasurementsobservablesoperatorssmeftflavour
verification ladder T0 review T1 audit T2 compute T3 formal
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We perform a model-independent analysis of top-philic New Physics scenarios, under the assumption that only effective operators involving top quarks are generated at tree level. Within the SMEFT framework, we derive indirect constraints on Wilson Coefficients by combining a large set of low-energy observables: B-meson and kaon decays, meson mixing observables, precision electroweak and Higgs measurements, anomalous magnetic moments, lepton flavour violating processes, lepton flavour universality tests, and measurements of the Cabibbo angle. We consider the renormalization group evolution of the operators and use the one-loop matching of the SMEFT onto the LEFT. The global analysis is then used to perform one-parameter, two-parameter, and global fits, as well as applications to explicit ultraviolet models. We find that the inclusion of measurements from different physics sectors reveals a strong interplay and complementarity among the observables. The resulting constraints are also compared to direct bounds provided by top quark productions at the LHC.

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Cited by 3 Pith papers

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

  1. Heavy neutral leptons and top quarks in effective field theory

    hep-ph 2025-01 conditional novelty 6.0 of 10

    Long-lived heavy neutral leptons produced via top-quark effective operators could be probed at the HL-LHC up to new-physics scales around 12 TeV at ATLAS and 4.5 TeV at MATHUSLA or ANUBIS.

  2. Renormalisation group evolution effects on global SMEFT analyses

    hep-ph 2024-12 conditional novelty 6.0 of 10

    Including RGE effects in a global SMEFT fit improves bounds on poorly constrained four-quark operators but weakens limits on modified Z q qbar couplings by up to a factor of ten.

  3. Accuracy complements energy: electroweak precision tests at Tera-Z

    hep-ph 2024-12 conditional novelty 5.0 of 10

    Z-pole precision at a Tera-Z factory gives projected sensitivities to Higgs and gauge SMEFT operators that are competitive with, and complementary to, higher-energy runs such as WW and ZH.

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