One Loop Multiphoton Helicity Amplitudes

Details One Loop Multiphoton Helicity Amplitudes One Loop Multiphoton Helicity Amplitudes

1993-11-02

arxiv.org/abs/hep-ph/9311213v1

Phys.Rev. D49 (1994) 2197-2210

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages + 4 uuencoded figures (included), Fermilab-Pub-93/327-T, RevTeX

Scientific paper

10.1103/PhysRevD.49.2197

We use the solutions to the recursion relations for double-off-shell fermion currents to compute helicity amplitudes for $n$-photon scattering and electron-positron annihilation to photons in the massless limit of QED. The form of these solutions is simple enough to allow {\it all}\ of the integrations to be performed explicitly. For $n$-photon scattering, we find that unless $n=4$, the amplitudes for the helicity configurations (+++...+) and (-++...+) vanish to one-loop order.

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