Antineutrino

An antineutrino is the antiparticle of a neutrino and carries the opposite additive lepton number.

The antineutrino associated with the muon flavour of the weak charged current has zero electric charge and lepton number $-1$ in the usual production-and-detection description. A negative muon decays to an electron, an electron antineutrino and a muon neutrino; the charge-conjugate process instead produces the muon antineutrino.

The antineutrino associated with the electron flavour of the weak charged current. It has zero electric charge and lepton number $-1$ in the usual production-and-detection description.