What is LHCf?

LHCb detector magnet
The LHCf collaboration. Image © CERN

The 21-member LHCf experiment consists of small detectors located on either side of the ATLAS experiment, about 450 feet from the point where the beams of protons collide. LHCf's measurement of the number and energy of neutral pions produced in the forward direction by ATLAS collisions will contribute to the understanding of ultrahigh-energy cosmic rays.  Experiments like the Pierre Auger Observatory and the Telescope Array are hoping to resolve the mysteries of how and where these ultra high-energy cosmic rays are produced.  Will the explanation require undiscovered principles of nature?

 To find out more about cosmic rays and how LHCf will contribute to our understanding of them, read The Science of LHCf.