Solving multi-loop Feynman diagrams using light-front coordinates

Details Solving multi-loop Feynman diagrams using light-front coordinates Solving multi-loop Feynman diagrams using light-front coordinates

1999-11-19

arxiv.org/abs/hep-ph/9911411v1

Phys.Rev. D61 (2000) 105010

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 3 figures

Scientific paper

10.1103/PhysRevD.61.105010

We determine the numerical values of scalar multi-loop two-vertex Feynman diagrams, the generalized sunset diagrams, by integrating all but the longitudinal momenta analytically. For the longitudinal momenta we introduce one collective coordinate, which allows us to determine the numerical value of the diagram efficiently and to an arbitrary accuracy. The imaginary part and the threshold behavior of the diagram are also handled within this framework.

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