On the Cuts of Scattering Amplitudes

Details On the Cuts of Scattering Amplitudes On the Cuts of Scattering Amplitudes

2008-07-22

arxiv.org/abs/0807.3493v1

Nucl.Phys.Proc.Suppl.183:54-59,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

To appear in the proceedings of 9th Workshop on Elementary Particle Theory: Loops and Legs in Quantum Field Theory, Sondershau

Scientific paper

10.1016/j.nuclphysbps.2008.09.08

The use of complex analysis for computing one-loop scattering amplitudes is naturally induced by generalised unitarity-cut conditions, fulfilled by complex values of the loop variable. We report on two techniques: the cut-integration with spinor-variables as contour integrals of rational functions; and the use of the Discrete Fourier Transform to optimize the reduction of tensor-integrals to master scalar integrals.

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