lepton

A lepton is a type of elementary particle, which means it is one of the fundamental building blocks of matter. Unlike protons and neutrons, which are found in atoms, leptons do not experience strong nuclear forces. The most well-known lepton is the electron, but there are others, including muons and tau particles, as well as their corresponding neutrinos. Leptons play a crucial role in the universe, participating in weak nuclear interactions and helping to explain fundamental processes in physics, such as radioactivity and particle decay.