Geodesic
Infrared asymptotic behavior of gauge-invariant propagator in quantum electrodynamics
Teoretičeskaâ i matematičeskaâ fizika, Tome 71 (1987) no. 1, pp. 54-66

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A new class of gauge-invariant fields is introduced. For the gauge-invariant propagator of a spinor field the analogue of the Dyson–Schwinger equations is derived. With the help of these equations as well as the functional integration method it is shown that the gauge-invariant spinor propagator has a simple pole singularity in the infrared region. 
@article{TMF_1987_71_1_a6,
     author = {N. B. Skachkov and I. L. Solovtsov and O. Yu. Shevchenko},
     title = {Infrared asymptotic behavior of gauge-invariant propagator in quantum electrodynamics},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {54--66},
     publisher = {mathdoc},
     volume = {71},
     number = {1},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1987_71_1_a6/}
}
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N. B. Skachkov; I. L. Solovtsov; O. Yu. Shevchenko. Infrared asymptotic behavior of gauge-invariant propagator in quantum electrodynamics. Teoretičeskaâ i matematičeskaâ fizika, Tome 71 (1987) no. 1, pp. 54-66. http://geodesic.mathdoc.fr/item/TMF_1987_71_1_a6/