More specifically: What separates a neutrino from an antineutrino? Lepton number cannot be considered as it is not a physical property of the particle: it is a value used to balance equations, and is assigned to them because they are either particles or antiparticles. They are electrically neutral and have no colour charge. The one property that could be different for them and their counterparts is the direction of spin. However, can't a neutrino spin in any direction anyway? I'm pretty sure there isnt a set of specific directions neutrinos are allowed to spin in, and a corresponding set of opposite directions for the antineutrinos. Surely that would require some explanation for the limitation, and because i can't think of anything that would back this up i'm going to assume the that that isn't the case. Therefore there is either no difference between a neutrino and an antineutrino, OR the difference is relative, and i'm not going into detail on that unless i have to because it's hard to put into words and isnt necessarily needed. So, if there really isn't a difference. If any of the above is incorrect, please give an explanation or i'll end up really confused.
If not, we can at least say the neutrinos are all their own antiparticles.
What do you think?