Muon antineutrino (${\bar{\nu }}_{\mu }$)

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.