Muon
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A muon is an elementary particle similar to the electron, with an electric charge of −1 e and a spin of 1/2, but with a much greater mass. It is classified as a lepton. As with other leptons, the muon is not thought to be composed of any simpler... Wikipedia
Composition: Elementary particle
Decays into: ; e−, ν; e, ν; μ (most common)
Discovered: Carl D. Anderson, Seth Neddermeyer (1936)
Electric charge: −1 e
Family: Lepton
Generation: Second
Interactions: Gravity, electromagnetic, weak