Physics at the FCC-ee

TL;DR

The FCC-ee collider aims to provide unprecedented precision in Standard Model measurements and explore new physics through massive data samples at various energies, enabling indirect discoveries and tests beyond current collider capabilities.

Contribution

This paper summarizes the physics potential of the FCC-ee, highlighting its ability to perform high-precision measurements and search for new particles and phenomena.

Findings

Potential to discover new particles up to 7 and 100 TeV scales.

Ability to perform competitive SUSY tests beyond LHC reach.

Enhanced searches for dark matter and sterile neutrinos below 60 GeV.

Abstract

The physics program accessible in $e^+e^-$ collisions at the Future Circular Collider (FCC-ee) is summarized. The FCC-ee aims at collecting multi-ab$^{-1}$ integrated luminosities in $e^+e^-$ at $\sqrt{s}$ = 90, 160, 240, and 350 GeV, yielding 10$^{12}$ Z bosons, 10$^{8}$ W$^+$W$^-$ pairs, 10$^{6}$ Higgs bosons and $4\cdot 10^{5}$ top-quark pairs per year. Such huge data samples combined with a $\cal{O}(100 \rm keV)$ c.m. energy uncertainty will allow for Standard Model measurements with unparalleled precision and searches for new physics in regions not probed so far. The FCC-ee will be able to (i) indirectly discover new particles coupling to the Higgs and electroweak bosons up to scales $\Lambda \approx$ 7 and 100 TeV; (ii) perform competitive SUSY tests at the loop level in regions beyond the LHC reach; and (iii) achieve the best potential in direct collider searches for dark matter and sterile neutrinos with masses below 60 GeV.