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Slavnov–Taylor identities

Non-abelian version of Ward-Takahashi identities From Wikipedia, the free encyclopedia

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In quantum field theory, a Slavnov–Taylor identity is the non-Abelian[1] generalisation of a Ward–Takahashi identity, which in turn is an identity between correlation functions that follows from the global or gauged symmetries of a theory, and which remains valid after renormalization. The identity was originally discovered by Gerard 't Hooft,[2] and it is named after Andrei Slavnov and John C. Taylor who rephrased the identity to hold off the mass shell.[3][4]

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