LEP2

LEP2, or the Large Electron-Positron Collider Second Phase, was a particle accelerator located at CERN near Geneva, operational from 1995 to 2000. It collided electrons and positrons at high energies to study fundamental particles and forces, contributing significantly to our understanding of the Standard Model of physics. By precisely measuring particles like the Z and W bosons, LEP2 helped test the consistency of existing theories and searched for new phenomena. It was a key step in advancing particle physics, paving the way for larger colliders like the LHC.