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Gauge Invariant Cutoff QED (1108.3215v3)

Published 16 Aug 2011 in hep-th and hep-ph

Abstract: A hidden generalized gauge symmetry of a cutoff QED is used to show the renormalizability of QED. In particular, it is shown that corresponding Ward identities are valid all along the renormalization group flow. The exact Renormalization Group flow equation corresponding to the effective action of a cutoff lambda phi⁴ theory is also derived. Generalization to any gauge group is indicated.