Lepton number is conserved in reactions, so in beta^- decay the electron (L = +1) is accompanied by:

  1. a neutrino (L = +1)
  2. a proton
  3. a positron
  4. an antineutrino (L = −1)
Answer

D) an antineutrino (L = −1)

Total lepton number stays 0. SLO P-11-F-16 · Knowledge

Physics MCQ · More Nuclear and Particle Physics MCQs · Practise