New Physics Reach through Precision at Future Colliders: a Multi-Pronged Approach
Abstract
We present projections for the sensitivity of future high-energy colliders to new physics through precision measurements of the Standard Model (SM) interactions, focusing on near-term electron-positron facilities: FCC-ee, LEP3, and the Linear Collider Facility. We interpret these projections in three complementary frameworks: Higgs coupling modifiers, effective Higgs and electroweak couplings, and global SMEFT fits. The SMEFT analysis includes renormalisation-group evolution, linear/quadratic contributions, and NLO corrections to EFT cross sections where available. By matching the EFT to UV-complete models, we also quantify the sensitivity of future colliders to representative benchmark scenarios, including composite Higgs models and single-particle SM extensions. In parallel, we release an updated version of the open-source SMEFiT framework, enabling the results presented here to be fully reproduced, extended, and customised.
Cite
@article{arxiv.2604.16596,
title = {New Physics Reach through Precision at Future Colliders: a Multi-Pronged Approach},
author = {Tommaso Armadillo and Eugenia Celada and Jaco ter Hoeve and Fabio Maltoni and Luca Mantani and Juan Rojo and Alejo N. Rossia and Simone Tentori and Marion O. A. Thomas and Eleni Vryonidou},
journal= {arXiv preprint arXiv:2604.16596},
year = {2026}
}
Comments
71 pages, 27 figures. SMEFiT is available from https://smefit.science/