A regularized version of Euclidean QED4 in the Feynman gauge is considered, with a fixed ultraviolet cutoff, photon mass of the size of the cutoff, and any value, including zero, of the electron mass. We will prove that the Schwinger functions are expressed by convergent series for small values of the charge and verify the Ward identities, up to corrections which are small for momentum scales far from the ultraviolet cutoff. (C) 2007 American Institute of Physics.
Renormalization group and Ward identities for infrared QED4 / V. Mastropietro. - In: JOURNAL OF MATHEMATICAL PHYSICS. - ISSN 0022-2488. - 48:10(2007).
Renormalization group and Ward identities for infrared QED4
V. MastropietroPrimo
2007
Abstract
A regularized version of Euclidean QED4 in the Feynman gauge is considered, with a fixed ultraviolet cutoff, photon mass of the size of the cutoff, and any value, including zero, of the electron mass. We will prove that the Schwinger functions are expressed by convergent series for small values of the charge and verify the Ward identities, up to corrections which are small for momentum scales far from the ultraviolet cutoff. (C) 2007 American Institute of Physics.
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