In physics, a lepton is a sub-atomic particle with spin of 1/2 that doesn't experience the strong interaction (that is, the strong nuclear force). The leptons form a family of fermions that are distinct from the other known family of fermions, the quarks. Properties of leptons There are three known flavors of lepton: the electron, the muon, and the tau lepton or tau (or sometimes tauon). Each flavor is represented by a pair of particles called a weak doublet. One is a massive charged particle th… (More on Leptons)