The CMS experiment at the CERN LHC

The Large Hadron Collider (LHC) is a superconducting circular protonproton collider operating at the laboratories of the European Organization for Nuclear Research (CERN); it is hosted in the 27 km underground tunnel that was previously used for the Large Electron Positron Collider (LEP). The design specifications of the LHC targeted operations at a center-of-mass energy of 14 TeV, with an instantaneous luminosity of 2·10 33 cm −2 s −1 in the first few years and 1·10 34 cm −2 s −1 afterwards [16]. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.