About the US/LHC Project

The Large Hadron Collider at CERN near Geneva, Switzerland is opening new vistas on the deepest secrets of the universe, stretching the imagination with newly discovered forms of matter, forces of nature, and dimensions of space. This site provides general information about the Large Hadron Collider and detailed information about American participation in the LHC accelerator and experiments. U.S. LHC participation is supported by the US Department of Energy's Office of Science and the National Science Foundation.

A proton-proton collision event in the CMS experiment producing two high-energy photons (red towers). This is what we would expect to see from the decay of a Higgs boson but it is also consistent with background Standard Model physics processes. (Courtesy: CERN)

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The LHC Experiments

The Large Hadron Collider will create almost a billion proton-proton collisions per second at an energy of 14 trillion electron volts. These collisions take place at four points around a 27-kilometer ring, where the four main LHC experiments—ALICE, ATLAS, CMS and LHCb—are located. Thousands of scientists around the world use the LHC experiments to investigate the nature of the physical universe.


What is ALICE?	What is ATLAS?	What is CMS?


What is LHCb?	What is LHCf?	What is TOTEM?