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On the Gauge-Independence of the S-Matrix

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arxiv hep-th/0104123 v2 pith:SSHHZUMG submitted 2001-04-13 hep-th

classification hep-th
keywords gauges-matrixvariationaccompaniedbasiscertainconditionsextended
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The S-matrix is invariant with respect to the variation of any (global) parameter involved in the gauge fixing conditions, if that variation is accompanied by a certain redefinition of the basis of polarization vectors. Renormalizability of the underlying gauge theory is not required. The proof is nonperturbative and, using the `extended' BRS transformation, quite simple.

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  1. Comments on the gauge dependence of the effective potential and the utility of the Vilkovisky-DeWitt formalism

    hep-th 2025-11 conditional novelty 3.0 of 10

    At an extremum, the effective potential is independent of the gauge-fixing parameter when the gauge-fixing function has zero vacuum expectation value; the Vilkovisky-DeWitt potential is gauge-fixing independent by con...

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