Tau have a charge of -1, and can be written as τ. Since antimatter has the opposite of charge of regular matter, anti-tauons have a charge of +1, and can be written as τ. Tauons themselves are unstable, and can decay. Also, τ and τ can annihilate each other in a form of decay. When a single tauon decays, it is the only lepton that can decay into hadrons (things made of quarks). τ and τ can be formed by an electron-positron (antielectron) pair combining. The two tauons then decay into an electron and a positron or a muon and an antimuon, and four of the various neutrinos. However, a single tauon decays differently than a tauon and an antitauon.