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Neutrino/Antineutrino
FirstNeutrinoEventAnnotated.jpg
The first use of a hydrogen bubble chamber to detect neutrinos, on November 13, 1970. A neutrino hit a proton in a hydrogen atom. The collision occurred at the point where three tracks emanate on the right of the photograph.
CompositionElementary particle
StatisticsFermion
GenerationFirst, second and third
InteractionsWeak interaction and gravitation
Symbol, ,
AntiparticleAntineutrinos are possibly identical to the neutrino (see Majorana fermion).
Theorized(Electron neutrino): Wolfgang Pauli (1930)
(Muon neutrino): Late 1940s (Tau neutrino): Mid 1970s
Discovered
Clyde Cowan, Frederick Reines (1956)
: Leon Lederman, Melvin Schwartz and Jack Steinberger (1962)
: DONUT collaboration (2000)
Types3 – electron neutrino, muon neutrino and tau neutrino
MassSmall, but non-zero.
Electric charge
Spin12
Weak hypercharge−1
BL−1
X−3

Neutrinos are a type of elementary particle that exist all across the universe. The word neutrino means a small neutral particle. Physicists study these particles, but they are hard to find because they have a very small chance of interacting with regular matter. (For example, they usually pass through the whole earth without touching any other particles). Neutrinos travel near the speed of light.

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