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arXiv · 2604.16596

New Physics Reach through Precision at Future Colliders: a Multi-Pronged Approach

Tommaso Armadillo·Eugenia Celada·Jaco ter Hoeve·Fabio Maltoni·Luca Mantani·Juan Rojo·Alejo N. Rossia·Simone Tentori·Marion O. A. Thomas·Eleni Vryonidou
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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.

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Tommaso Armadillo, Eugenia Celada, Jaco ter Hoeve, Fabio Maltoni, Luca Mantani, Juan Rojo, Alejo N. Rossia, Simone Tentori, Marion O. A. Thomas, Eleni Vryonidou. 2026-04-17. New Physics Reach through Precision at Future Colliders: a Multi-Pronged Approach. https://arxiv.org/abs/2604.16596

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