Precision measurements of the top quark couplings at the FCC

TL;DR

This paper discusses the FCC's design for high-energy proton-proton and electron-positron colliders, emphasizing their potential for precise top quark coupling measurements and new physics exploration.

Contribution

It introduces the FCC project and highlights its capability to perform unprecedented precision measurements of top quark couplings through combined collider stages.

Findings

FCC-ee enables precise electroweak measurements.

FCC-hh allows high-energy proton collisions for new physics.

Combined FCC stages improve top quark coupling sensitivity.

Abstract

The design study of the Future Circular Colliders (FCC) in a 100-km ring in the Geneva area has started at CERN at the beginning of 2014, as an option for post-LHC particle accelerators. The study has an emphasis on proton-proton and electron-positron high-energy frontier machines. In the current plans, the first step of the FCC physics programme would exploit a high-luminosity e+e- collider called FCC-ee, with centre-of-mass energies ranging from below the Z pole to the t-tbar threshold and beyond, followed by 100\,TeV proton-proton collisions as ultimate goal. When combined, these two steps offer a large palette of complementary measurements and sensitivity for new physics. In particular, the association of the FCC-ee and the FCC-hh allows measurements of the top-quark electroweak and Yukawa couplings to be performed with unrivaled precision.