# 2000 TAU NEUTRINO HAS BEEN FOUND

TAU NEUTRINO HAS BEEN FOUND

DONUT (Direct Observation of a Nu Tau Neutrino) was a Fermi National Accelerator Laboratory experiment. To generate a concentrated stream of neutrinos, the cooperation employed the Tevatron, the world’s most powerful particle accelerator at the time. The tau neutrino, the third type of neutrino, was found experimentally by the DONUT project. Only one in a billion tau neutrinos collided in the detector, leaving a trace that physicists could identify. Scientists discovered four tau neutrinos, a modest but substantial amount.