Coherent States in Null-Plane Q.E.D

Details Coherent States in Null-Plane Q.E.D Coherent States in Null-Plane Q.E.D

1993-11-17

arxiv.org/abs/hep-th/9311101v1

Phys.Rev. D50 (1994) 4088-4096

Physics

High Energy Physics

High Energy Physics - Theory

20 pages and two figures, REVTEX, ITP-SB-93-75

Scientific paper

10.1103/PhysRevD.50.4088

Light front field theories are known to have the usual infra-red divergences of the equal time theories, as wellas new `spurious' infra-red divergences. The formar kind of IR divergences are usually treated by giving a small mass to the gauge particle. An alternative method to deal with these divergences is to calculate the transition matrix elements in a coherent state basis. In this paper we present, as a model calculation the lowest order correction to the three point vertex in QED using a coherent state basis in the light cone formalism. The relevant transition matrix element is shown to be free of the true IR divergences up to $O(e^2)$.

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