CMS experiment control room. Hardware in the CMS (Compact Muon Solenoid) experiment control room at CERN (the European particle physics laboratory) near Geneva, Switzerland. The CMS detector sits around the large hadron collider (LHC), CERN's highest energy particle accelerator. The main goal of the CMS experiment is the discovery of the Higgs boson, an elementary particle predicted by the Standard Model of particle physics, but yet to be directly detected (as of 2010).