A novel approach to light-front perturbation theory

Details A novel approach to light-front perturbation theory A novel approach to light-front perturbation theory

2006-10-23

arxiv.org/abs/hep-ph/0610293v1

Phys.Rev.D75:025013,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 5 figures

Scientific paper

10.1103/PhysRevD.75.025013

We suggest a possible algorithm to calculate one-loop n-point functions within a variant of light-front perturbation theory. The key ingredients are the covariant Passarino-Veltman scheme and a surprising integration formula that localises Feynman integrals at vanishing longitudinal momentum. The resulting expressions are generalisations of Weinberg's infinite-momentum results and are manifestly Lorentz invariant. For n = 2 and 3 we explicitly show how to relate those to light-front integrals with standard energy denominators. All expressions are rendered finite by means of transverse dimensional regularisation.

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