Finding new physics will require a new particle collider

DEEP UNDER the countryside north of Geneva, straddling the Franco-Swiss border, one of the most advanced scientific machines ever built has been banging subatomic particles together for more than a decade. This device, the Large Hadron Collider (LHC), accelerates beams of protons (members of a class of particle called hadrons) in opposite directions around a 27km ring until they reach almost the speed of light. Powerful magnets then force these protons into head-on collisions, causing the energy...