1. The problem statement, all variables and given/known data Show that if [itex]\psi[/itex] is a down-spin anti-electron, and we apply charge conjugation, then [itex]\psi^C[/itex] is an up-spin electron. 3. The attempt at a solution My calculations suggest that the anti-electron indeed becomes an electron; however, spin does not change for me. Is it possible that the above assignment is incorrect?