Gauge invariant decomposition of 1-loop multiparticle scattering amplitudes

Details Gauge invariant decomposition of 1-loop multiparticle scattering amplitudes Gauge invariant decomposition of 1-loop multiparticle scattering amplitudes

2001-04-17

arxiv.org/abs/hep-ph/0104164v1

Phys.Lett. B531 (2002) 83-89

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages

Scientific paper

10.1016/S0370-2693(02)01357-6

A simple algorithm is presented to decompose any 1-loop amplitude for scattering processes of the class 2 fermions -> 4 fermions into a fixed number of gauge-invariant form factors. The structure of the amplitude is simpler than in the conventional approaches and its numerical evaluation is made faster. The algorithm can be efficiently applied also to amplitudes with several thousands of Feynman diagrams.

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