Consistent perturbative light-front formulation of quantum electrodynamics

Details Consistent perturbative light-front formulation of quantum electrodynamics Consistent perturbative light-front formulation of quantum electrodynamics

1998-06-19

arxiv.org/abs/hep-th/9806163v1

Phys.Rev. D58 (1998) 105011

Physics

High Energy Physics

High Energy Physics - Theory

PlainTeX, 29 pages, 5 Postscript figures

Scientific paper

10.1103/PhysRevD.58.105011

A new light-front formulation of Q.E.D. is developed, within the framework of standard perturbation theory, in which $x^+$ plays the role of the evolution parameter and the gauge choice is $A_+=0$ (light-front "temporal" gauge). It is shown that this formulation leads to the Mandelstam-Leibbrandt causal prescription for the non-covariant singularities in the photon propagator. Furthermore, it is proved that the dimensionally regularized one loop off-shell amplitudes exactly coincide with the correct ones, as computed within the standard approach using ordinary space-time coordinates.

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