Abstract
We perform global fits within Standard Model Effective Field Theory (SMEFT) combining top-quark pair production processes and decay with b → s flavor changing neutral current transitions and Z → \( b\overline{b} \) in three stages: using existing data from the LHC and B-factories, using projections for the HL-LHC and Belle II, and studying the additional new physics impact from a future lepton collider. The latter is ideally suited to directly probe ℓ+ℓ− → \( t\overline{t} \) transitions. We observe powerful synergies in combining both top and beauty observables as flat directions are removed and more operators can be probed. We find that a future lepton collider significantly enhances this interplay and qualitatively improves global SMEFT fits.
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Bißmann, S., Grunwald, C., Hiller, G. et al. Top and beauty synergies in SMEFT-fits at present and future colliders. J. High Energ. Phys. 2021, 10 (2021). https://doi.org/10.1007/JHEP06(2021)010
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DOI: https://doi.org/10.1007/JHEP06(2021)010