View from the floor of the two walls M1 and M2 of the LHCb Muon detector
Credit: CERN

# Subatomic particle first

Fundamental particles and interactions
Particle Physics

Physicists have proved that a subatomic particle can switch into its antiparticle alter-ego and back again, in a new discovery. An extraordinarily precise measurement made by Oxford researchers using the LHCb experiment at CERN has provided the first evidence that charm mesons can change into their antiparticle and back again.