# What is the parity of a $W^{-}$ boson?

What is the parity eigenvalue of the $W^{\pm}$ boson, or is it even an eigenstate? I have not found any source that discusses this. I have seen some lists of particles with their parity eigenvalues, but the $W^{\pm}$ and $Z^{0}$ bosons are always left out.

• Parity is broken in the Electroweak interactions. Only CP is a (n approximate) good symmetry. But $W^{\pm}$ are not eigenstates being charged. – TwoBs May 26 '14 at 11:56

• i agree with this answer, but in your second link, top of p3, parity $P_{W^+}=P_{W^-}=-1$. huh? is the link, mark thompson's cambridge lecture notes, wrong? – innisfree May 26 '14 at 12:50