Implementation of the Leibbrandt-Mandelstam gauge prescription in the null plane bound state equation
Dec, 199220 pages
Published in:
- Phys.Rev.D 48 (1993) 1841-1851
Report number:
- OITS-497
Citations per year
Abstract: (APS)
In gauge theories in a null-plane gauge, infinities can arise from the 1n·q singularity in the gauge boson propagator. Leibbrandt and Mandelstam have given a prescription for defining this singularity so as to give finite results for the four-dimensional loop integrals in Feynman diagrams. However, this prescription is not directly applicable to calculations based on x+ ordered perturbation theory, and in particular to the the null-plane bound-state equation. We show how the prescription can be applied in the simplest version of this kind of calculation.- gauge field theory
- gauge boson: propagator
- quantum chromodynamics
- bound state
- meson: wave function
- Bethe-Salpeter equation
- gluon: exchange
- exchange: gluon
- Feynman graph: higher-order
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