https://doi.org/10.1140/epjc/s10052-025-14359-8
Regular Article - Theoretical Physics
Flavored circular collider: cornering New Physics at FCC-ee via flavor-changing processes
1
Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany
2
Physik-Institut, Universität Zürich, 8057, Zurich, Switzerland
Received:
23
April
2025
Accepted:
21
May
2025
Published online:
9
June
2025
We illustrate the potential of a future high-intensity 
collider running at the Z pole in probing extensions of the Standard Model via precise measurements of flavor-changing processes. We illustrate this potential both within effective field theories and simplified models inspired by current B-physics data, focusing on selected flavor-physics measurement projections at FCC-ee, and by the theoretically well-motivated scenario of TeV-scale new physics predominantly coupled to third-generation fields. In particular, we demonstrate the key role played by the interplay among different flavor-physics measurements, and between flavor and electroweak measurements, in cornering the New Physics parameter space. Updated constraints on new physics, in the limit that no deviations from the Standard Model are observed, are also presented.
© The Author(s) 2025
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