Gauge invariance and background field formalism in the exact renormalisation group

Details Gauge invariance and background field formalism in the exact renormalisation group Gauge invariance and background field formalism in the exact renormalisation group

2000-09-14

arxiv.org/abs/hep-th/0009110v2

Phys.Lett. B495 (2000) 256-262

Physics

High Energy Physics

High Energy Physics - Theory

version to be published in PLB

Scientific paper

10.1016/S0370-2693(00)01231-4

We discuss gauge symmetry and Ward-Takahashi identities for Wilsonian flows in pure Yang-Mills theories. The background field formalism is used for the construction of a gauge invariant effective action. The symmetries of the effective action under gauge transformations for both the gauge field and the auxiliary background field are separately evaluated. We examine how the symmetry properties of the full theory are restored in the limit where the cut-off is removed.

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