FCC-ee, an Accelerator for New Physics Searches in the Heavy Quark Sector

This manuscript is devoted to the description of the proposed Future Circular Collider (FCC) project and its physics program focused on measurements involving heavy quarks. It summarizes the report submitted to the US 2021 Snowmass Process and European Strategy on Particle Physics. The proposed electron-positron collider based on established technologies will provide high instantaneous luminosities at center-of-mass energies from the Z resonance through the ZH and WW and up to the $t\bar{t}$ threshold. This will allow a very rich set of fundamental measurements as well as the study of heavy-flavor and tau physics in ultra-rare decays beyond the LHC reach.