Path integral regularization of QED by means of Stueckelberg fields

Details Path integral regularization of QED by means of Stueckelberg fields Path integral regularization of QED by means of Stueckelberg fields

2004-10-26

arxiv.org/abs/hep-th/0410251v2

Phys.Lett. B631 (2005) 83-92

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX file, 12 pages, 3 figures. Revised version, to be published in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2005.09.065

With the help of a Stueckelberg field we construct a regularized U(1) gauge invariant action through the introduction of cutoff functions. This action has the property that it converges formally to the unregularized action of QED when the ultraviolet cutoff goes to infinity. Integrating out exactly the Stueckelberg field we obtain a simple effective regularized action, which is fully gauge invariant and gives rise to the same prediction as QED at the tree level and to the one loop order.

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