Energy Frontier researchers accelerate particles to the highest-energies ever made by humanity and collide them to produce and study the fundamental constituents of matter and the architecture of the universe.

The Office of High Energy Physics supports the following experiments and facilities at the energy frontier:

A Toroidal LHC ApparatuS (ATLAS)

at the CERN Large Hadron Collider, Switzerland

A Toroidal LHC ApparatuS is a particle physics experiment at the Large Hadron Collider at CERN that is searching for new discoveries in the head-on collisions of protons of extraordinarily high energy. Following the discovery of the Higgs boson, further data will allow in-depth investigation of the boson's properties and thereby of the origin of mass as well as will probe new physics at high energy and mass scales.

Compact Muon Solenoid (CMS)

at the CERN Large Hadron Collider, Switzerland

The Compact Muon Solenoid is a particle detector that is designed to see a wide range of particles and phenomena produced in high-energy collisions at the LHC. Like a cylindrical onion, layered detectors measure the different signatures of particles originating from these collisions and use that data to build a picture of events at the heart of the collision.