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arXiv · hep-th/9311101

Coherent States in Null-Plane Q.E.D

Anuradha Misra
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Abstract

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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Anuradha Misra. 1993-11-17. Coherent States in Null-Plane Q.E.D. https://doi.org/10.1103/physrevd.50.4088

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