# Why is anti-neutrino produced along side with electron in beta minus decay? [duplicate]

In these reactions, we have the conservation of lepton number. We had zero electrons and neutrinos before the decay of the neutron (lepton number $$0$$) and after the decay we have one proton (lepton number $$0$$), one electron (lepton number $$+1$$) and one (electron) antineutrino (lepton number $$-1$$). So, we have called that particle an antineutrino, and it has a negative lepton number.