GHP[p, a, b]
gives the ghost propagator where a
and b
are the color indices.
GHP[p]
omits the .
Overview, GhostPropagator, GluonPropagator, GluonGhostVertex.
[p, a, b] GHP
[p] // Explicit GHP
[p, c1, c2] GHP
StandardForm[FCE[GHP[-k, c3, c4] // Explicit]]
(*I FAD[k] SD[c3, c4]*)