11. Your neutrino or antineutrino are approximately massless, though that is a hypothesis. 12. Then the W-boson decays in an electron and an electron antineutrino . 13. The 3 ?3 off-diagonal blocks lead to neutrino antineutrino oscillations. 14. If they do, their properties are substantially different from observable neutrinos and antineutrinos . 15. And each has its associated antiparticle : electron antineutrino , muon antineutrino and tau antineutrino. 16. And each has its associated antiparticle : electron antineutrino, muon antineutrino and tau antineutrino. 17. And each has its associated antiparticle : electron antineutrino, muon antineutrino and tau antineutrino . 18. The masses lie below the Mainz-Troitsk upper bound of for the electron antineutrino . 19. The KamLAND detector not only counts the antineutrino rate, but also measures their energy. 20. Or do right-handed neutrinos and left-handed antineutrinos exist as separate particles?
