NEUTRINO EXPERIMENT HELPS REVEAL NEW FORCE CARRIER
The Gargamelle experiment at CERN was a bubble chamber filled with freon. In it, scientists observed for the first time the neutral-current scattering of a neutrino off an electron. This was a weak interaction in which the particles didn’t exchange electric charge. The experiment indicated the existence of a new force carrier, later discovered to be the Z boson (one of the fundamental particles in the Standard Model).