FCC-ee: the lepton collider: future circular collider conceptual design report volume 2

Research output: Contribution to journalArticlepeer-review


  • the FCC Collaboration

Colleges, School and Institutes

External organisations

  • Sezione di Bari
  • Universita degli Studi di Bari
  • Shahid Beheshti University
  • Bochvar Institute of Inorganic Materials (VNIINM)
  • Dep. of Physics, Royal Holloway, University of London, Egham TW20 0EX, UK
  • University of Applied Sciences Technikum Wien (UAS TW)
  • TOBB University of Economics and Technology
  • University of Belgrade
  • Harvard University
  • Universidad de Granada
  • Universitat de València
  • Paul Scherrer Institut
  • European Organization for Nuclear Research (CERN)
  • Department of Physics and Astronomy and INFN
  • University of Rome Tor Vergata
  • Kahramanmaras Sutcu Imam University (KSU)
  • Laboratori Nazionali Del Sud (LNS)
  • University of Catania
  • University of Manchester
  • CEA Saclay
  • Fermi National Accelerator Laboratory
  • Istituto Nazionale di Fisica Nucleare, Sezione di Milano
  • University of Cambridge
  • Eskişehir Technical University (ESTU)
  • Istanbul University
  • University of California, Santa Cruz
  • Linde Kryotechnik AG (Linde)
  • Sezione INFN di Firenze
  • University of Florence
  • Università degli Studi di Milano and oINFN-Milan
  • Massachusetts Institute of Technology
  • MAN Energy Solutions Schweiz AG (MAN ES)
  • Muenster University
  • Laboratori Nazionali dell'Infn di Frascati
  • INFN Padova
  • University of Padova Dep. Pure and Applied Mathematics Via Trieste
  • Università di Insubria (UNINSUBRIA)


In response to the 2013 Update of the European Strategy for Particle Physics, the Future Circular Collider (FCC) study was launched, as an international collaboration hosted by CERN. This study covers a highest-luminosity high-energy lepton collider (FCC-ee) and an energy-frontier hadron collider (FCC-hh), which could, successively, be installed in the same 100 km tunnel. The scientific capabilities of the integrated FCC programme would serve the worldwide community throughout the 21st century. The FCC study also investigates an LHC energy upgrade, using FCC-hh technology. This document constitutes the second volume of the FCC Conceptual Design Report, devoted to the electron-positron collider FCC-ee. After summarizing the physics discovery opportunities, it presents the accelerator design, performance reach, a staged operation scenario, the underlying technologies, civil engineering, technical infrastructure, and an implementation plan. FCC-ee can be built with today’s technology. Most of the FCC-ee infrastructure could be reused for FCC-hh. Combining concepts from past and present lepton colliders and adding a few novel elements, the FCC-ee design promises outstandingly high luminosity. This will make the FCC-ee a unique precision instrument to study the heaviest known particles (Z, W and H bosons and the top quark), offering great direct and indirect sensitivity to new physics.


Original languageEnglish
Pages (from-to)261-623
Number of pages363
JournalEuropean Physical Journal: Special Topics
Issue number2
Publication statusPublished - 4 Jun 2019