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Bound state solutions of scalar QED2+1 for zero photon mass

Taco Nieuwenhuis, J. A. Tjon

hep-pharXiv:hep-ph/9506346

Abstract

The Feynman-Schwinger representation is used to study the behavior of solutions of scalar QED in (2+1) dimensions. The limit of zero photon mass is seen to be smooth. The Bethe-Salpeter equation in the ladder approximation also exhibits this property. They clearly deviate from the behavior in the nonrelativistic limit. In a variational analysis we show that this difference can be attributed to retardation effects of relativistic origin.

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