On the photon Green's function
Teoretičeskaâ i matematičeskaâ fizika, Tome 15 (1973) no. 2, pp. 227-236
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An expression is found for the photon Green's function that has the correct analytic properties and is suitable not only in the asymptotic region (see [1]) but also at small momenta. Its difference from the ordinary expression in the region of momenta $q^2\ll m^2\exp(3\pi/\alpha)$ is given by exponentially small terms of order $\exp(-3\pi/\alpha)$.
@article{TMF_1973_15_2_a5,
author = {D. A. Kirzhnits and G. Yu. Kryuchkov},
title = {On the photon {Green's} function},
journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
pages = {227--236},
year = {1973},
volume = {15},
number = {2},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/TMF_1973_15_2_a5/}
}
D. A. Kirzhnits; G. Yu. Kryuchkov. On the photon Green's function. Teoretičeskaâ i matematičeskaâ fizika, Tome 15 (1973) no. 2, pp. 227-236. http://geodesic.mathdoc.fr/item/TMF_1973_15_2_a5/
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