# Origin of Higgs ghosts

In M. Veltman's Diagrammatica, appendix E, one can find the full Standard Model lagrangian. Some sectors (e.g fermion-Higgs and weak sectors) contain so-called Higgs ghosts $\phi^+,\phi^-$ and $\phi^0$.

If so,

why does the Higgs field, not being a gauge field, yield Faddeev-Popov ghosts?

If not,

in which sense are they ghosts?

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The Higgs ghosts are Goldstone bosons for the spontaneously broken part of the electroweak symmetry $SU(2) \times U(1)$, which, popularly speaking, get eaten by the massive gauge bosons $W^{\pm}$ and $Z$ via the Higgs mechanism. They are ghosts in the sense that they are not physical fields but rather gauge-dependent artifacts.