= Ghost-gluon vertex
{title2=$\mathcal L_{\bar cAc}=-g f^{abc}(\partial^\mu\bar c^a)A_\mu^b c^c$}
Expanding the ghost covariant derivative in <Yang-Mills theory> produces an interaction between the <Faddeev-Popov ghost field>, <Faddeev-Popov antighost field>, and gauge boson. For the displayed kinetic convention, Fourier factors $e^{-ipx}$ and all momenta incoming give vertex $-g f^{abc}k_\mu$, where $k$ is the antighost momentum. The <structure constants> encode the <Adjoint representation>. Propagator, vertex, Fourier, and ghost-order conventions must be chosen consistently.
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