Physics at Fermilab
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Discoveries at Fermilab - The Tau Neutrino

Neutrino Symbol An international collaboration of scientists at the Department of Energy's Fermi National Accelerator Laboratory announced on July 21, 2000 the first direct evidence for the subatomic particle called the tau neutrino, the third kind of neutrino known to particle physicists. They reported four instances of a neutrino interacting with an atomic nucleus to produce a charged particle called a tau lepton, the signature of a tau neutrino.

  • Complete Text of News Release
  • The Story of the Neutrino
  • Interesting Facts and Comments
  • Details of the DONUT Experiment
  • Members of the DONUT Collaboration
  • The Standard Model of Elementary Particles and Forces
  • Photos and Graphics
  • Video of DONUT scientific colloquium available on-line