Light-by-light scattering amplitudes from generalized unitarity in massive QED

Details Light-by-light scattering amplitudes from generalized unitarity in massive QED Light-by-light scattering amplitudes from generalized unitarity in massive QED

2008-04-04

arxiv.org/abs/0804.0749v3

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pages, 42 diagrams, adds references

Scientific paper

We calculate all the four-photon helicity amplitudes at the one-loop level in
a massive theory using multiple-cut methods. The amplitudes are derived in
scalar QED, QED and $\textrm{QED}^{\caln =1}$ theories. We will see the origin
of rational terms. We extend the calculation to the simplest six-photon
helicity amplitude where all photons have the same helicity.

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