A title "lepton" comes from either a Greek λεπτόν, meaning "small" or even "thin". Notwithstanding, this title originates from either prior to a discovery of a particularly heavily lepton known as the tauon. the tau-minus particle is about twice a mass of a proton.

There are Xii known types of lepton, Iii of which are then matter particles (a electron, the muon and the tauon), 3 corresponding neutrinos, and their Half a dozen various antiparticles. Totally known charged leptons own a individual negative or even even caring charge (based in whether it is particles or antiparticles) & everthing of the neutrinos & antineutrinos have neutral charge. In a main, a total of leptons of the equivalent nature & severity (negatron & negatron neutrinos; mu-meson & mu-meson neutrinos; tau-minus particle and tau neutrinos) remains the equivalent whenever particles interact (called conservation of lepton number).

A table of the leptons