Electroweak gauge boson

The charged electroweak gauge fields are $W_{\mu }^{\pm }=(W_{\mu }^1\mp i{W}_{\mu }^2)/\sqrt{2}$. After electroweak symmetry breaking they have electric charges $\pm 1$ and mass $gv/2$.

The neutral massive electroweak gauge field is proportional to $g{W}_{\mu }^3-g^{\prime }{B}_{\mu }$ and has mass $v\sqrt{g^2+g^{\prime 2}}/2$.