A neutral lepton; one exists for each of the charged leptons (electron, muon, and tau) all of which are very light and could possibly have zero mass.

The existence of the neutrino was postulated by Enrico Fermi to explain a loss of energy in the radioactive beta decay. The neutrinos produced in the beta decay carry away the lost energy.

The weak force is the only one that affects neutrinos.


M. Antonello, et al., "Measurement of the neutrino velocity with the ICARUS detector at the CNGS beam"

Brent Follin, Lloyd Knox, Marius Millea, and Zhen Pan, "First Detection of the Acoustic Oscillation Phase Shift Expected from the Cosmic Neutrino Background", Phys. Rev. Lett. 115, 091301

See also: Antineutrino, Electron, Fermions, Lepton, Muon.

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Subjects: Physics

Ice Cube South Pole Neutrino Observatory