Welcome to the web pages of the FCC-ee/TLEP
Saclay design study group

TLEP is a high luminosity electron-positron collider to study the Higgs boson and physics at the electroweak scale. This machine could be the precursor of a 80-100 TeV hadron collider (VHE-LHC) as part of a long-term vision envisioned for CERN.

TLEP (for triple LEP) is a concept inspired by the Large Electron-Positron collider (LEP) built at CERN and using the most recent developments in the B factory.

It would be installed in a tunnel some 80–100 km in circumference and would be capable of collisions up to 350 GeV in the centre of mass or somewhat higher.