Gauge invariant cutoff QED

A hidden generalized gauge symmetry of a cutoff QED is used to show the renormalizability of QED. In particular, it is shown that the corresponding Ward identities are valid all along the renormalization group flow. The exact renormalization group flow equation corresponding to the effective action...

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Bibliographic Details
Published in:Physica scripta 2013-03, Vol.87 (3), p.35101-12
Main Authors: Ardalan, F, Arfaei, H, Ghasemkhani, M, Sadooghi, N
Format: Article
Language:English
Subjects:
Flow equations
Gages
Gauges
Invariants
Symmetry
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Summary:A hidden generalized gauge symmetry of a cutoff QED is used to show the renormalizability of QED. In particular, it is shown that the 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 λ 4 theory is also derived. Generalization to any gauge group is indicated.
ISSN:0031-8949
1402-4896
DOI:10.1088/0031-8949/87/03/035101