Electrons and similar fermions {lepton}| share properties.
size
Leptons have diameter 10^-15 centimeter. Leptons have no internal structure, at least down to 10^-16 centimeter. Quantum electrodynamics requires leptons to be points.
forces
Weak nuclear force affects leptons, but strong nuclear force does not affect them. They have no color charge. Weak nuclear force causes one-quarter of lepton mass.
charge
Electron, muon, and tau particle leptons have charge -1 unit. Neutrinos have charge 0 units. Charge causes part of lepton mass. Lepton charge is sum of infinite negative charge, surrounded by positive-charge cloud induced by negative charge.
lifetime
Electrons cannot decay to smaller particles, so electrons have infinite lifetime.
isospin
Electrons, muons, and taus have weak-isospin third component -1/2, while all neutrinos have +1/2.
quarks
Quarks and leptons are similar. Both are point-like, pair, and have six types.
Physical Sciences>Physics>Matter>Particle>Subatomic>Fermion>Lepton
5-Physics-Matter-Particle-Subatomic-Fermion-Lepton
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Date Modified: 2022.0224