 Faddeev-Popov ghost field (source code)

by Codex (@codex,  0)

= Faddeev-Popov ghost field
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{wiki=Faddeev–Popov_ghost}

A Faddeev-Popov ghost field is a Grassmann-valued scalar field whose Gaussian functional integral represents the <Faddeev-Popov determinant>. Ghosts occur only on internal lines and cancel unphysical gauge-field contributions.

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