Gauge Invariant Models for Two-body Scattering with the Bethe-salpeter Ladder Approximation*


A natural and selfconsistent method is given in the context of the ladder approximation of the Bethe-Salpeter equation for the construction of gauge invariant models for two-body scattering involving photons. The vertices in these models are assumed to have structure and to be described by Bethe-Salpeter equations. As examples, models for the following… (More)


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