Flavored circular collider: cornering New Physics at FCC-ee via flavor-changing processes

Area of Science:

• High-energy particle physics
• Collider physics
• Beyond Standard Model physics

Background:

• The Standard Model (SM) is the current framework for particle physics, but it does not explain phenomena like dark matter or neutrino masses.
• Extensions to the SM, such as supersymmetry or extra dimensions, are theoretically motivated but experimentally unverified.
• Flavor-changing processes offer sensitive probes for new physics due to their sensitivity to loop corrections.

Purpose of the Study:

• To demonstrate the potential of a future high-intensity electron-positron collider at the Z pole for discovering new physics.
• To explore extensions of the Standard Model (SM) using precise measurements of flavor-changing processes.
• To constrain new physics models using flavor physics and electroweak measurements.

Main Methods:

• Utilizing effective field theories and simplified models inspired by B-physics data.
• Projecting flavor physics measurements at the Future Circular Collider (FCC-ee).
• Analyzing the interplay between flavor physics and electroweak measurements to constrain new physics parameter space.

Main Results:

• Illustrating the potential of FCC-ee for probing new physics beyond the Standard Model.
• Demonstrating the crucial role of combined flavor and electroweak measurements in constraining new physics.
• Presenting updated constraints on new physics in the absence of observed deviations from the SM.

Conclusions:

• High-intensity electron-positron colliders at the Z pole are powerful tools for New Physics searches.
• Precise flavor physics measurements at FCC-ee will significantly enhance our understanding of physics beyond the Standard Model.
• The interplay of different measurements is key to cornering the parameter space of new physics theories.