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

Abstract

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.

32 pages, 42 diagrams, adds references

References in corpus (5)

• On the Rational Terms of the one-loop amplitudes
• Numerical integration of one-loop Feynman diagrams for N-photon amplitudes
• On Triple-Cut of Scattering Amplitudes
• Unitarity Cuts with Massive Propagators and Algebraic Expressions for Coefficients
• One-loop Integral Coefficients from Generalized Unitarity

Cited by in corpus (1)

• Reduction of one-massless-loop with scalar boxes in $n+2$ dimensions