The Future Circular Collider at CERN – Unprecedented Physics Reach for the 21st Century & New Challenges for Detectors

by Martin Aleksa (CERN)

Wednesday 3 Dec 2025, 11:15 → 12:45 Europe/Zurich

Stückelberg auditorium (Ecole de physique)

The Future Circular Collider (FCC) is proposed as the next flagship project at CERN, it envisions an electron-positron collider phase (FCC-ee) followed by a proton-proton collider (FCC-hh) in the same 91km-circumference tunnel reaching a center-of-mass energy of 100 TeV. While the FCC-ee offers unprecedented precision measurements of the Higgs properties and will improve by orders of magnitude the precision of key electroweak parameters, the FCC-hh stands out for a mass reach for direct discovery of particles up to several tens of TeV. 
The seminar will discuss the physics motivation and describe the proposed FCC-ee accelerator project. Benchmark physics channels will be presented defining the performance requirements of the experiments. Different detector concepts that are being proposed for the four interaction points will be introduced and discussed. The main focus will be put on the ALLEGRO detector concept, where the different sub-detectors and design ideas will be explained.