Supersymmetric particle production. Computer artwork showing the results of a collision between a quark (purple) and an antiquark (light blue). The collision will form two heavy supersymmetric particles (blue) that will decay into two lighter supersymmetric particles (green) and W and Z particles (pink). The W (right) particle then further decays into a muon (yellow) and an antineutrino (grey) and the Z particle (left) decays into a positron and an electron (both yellow). As of March 2007 supersymmetric particles are yet to be detected. It is hoped that the high energy collisions possible within the Large Hadron Collider (LHC), which begins operation in the summer of 2007 at CERN, will allow the detection of supersymmetric particles.