# Neutrino mass and the Majorana equation

I can't seem find this on the Internet. What does the Majorana equation predict neutrino masses to be (if they were their own antiparticle), and how? (I have little understanding of spinors, btw...)

Bonus question: Also, on a similar note, what properties have to be zero in order for a particle to be its own antiparticle?

• you get that a particle is its own antiparticle if you assume that the field is real. – Phoenix87 Mar 4 '15 at 17:32

• A particle is its own anti-particle if the field describing the particle is a real field. That means obviously that the electric charge is 0 but not necessarily that other charges are zero. For instance, if the neutrinos are Majorana neutrinos, they would still have $SU(2)_L$ charge (weak isospin charge).