A modified Faddeev‐Popov path integral density for the quantization of Yang‐Mills theory in the Feynman gauge is discussed, where contributions of the Faddev‐Popov ghost fields are replaced by multi‐point gauge field interactions. An explicit calculation to O(g^2) shows the equivalence of the usual Faddeev‐Popov scheme and its modified version.
Danijel Markovic (Vienna): Perturbative Yang‐Mills theory without Faddeev‐Popov ghost fields
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