Based on the framework of Standard Model Effective Field Theory, we performed a few global fits, each containing a subset of dimension-6 operators, for the measurements that are expected at future colliders. The fit for the Higgs and electroweak sector improves what has been done for the European Strategy Update in 2020 on both EFT treatments and experimental inputs. A new comprehensive fit is performed focusing on 4-fermion interactions at future colliders. Top-quark sector is studied in a dedicated fit which restricts the operators and measurements to be directly related to top-quark. A small subset of CP-violating operators involving bosonic fields alone are also investigated. Various running scenarios for future e+e- and Muon Colliders that are suggested in the Snowmass 2021 discussion are considered in the global fits. The outcomes from each fit are expressed in terms of either direct constraint on Wilson Coefficients or precision on Higgs and electroweak effective couplings.
@article{arxiv.2206.08326,
title = {Global SMEFT Fits at Future Colliders},
author = {Jorge de Blas and Yong Du and Christophe Grojean and Jiayin Gu and Victor Miralles and Michael E. Peskin and Junping Tian and Marcel Vos and Eleni Vryonidou},
journal= {arXiv preprint arXiv:2206.08326},
year = {2024}
}
Comments
Contributed Paper to Snowmass 2021. Minor updates from v4: corrected typo in FCC-ee240 luminosity in Table 27 and CEPC360 luminosity in Table 28