Abstract
We treat massive electrodynamics as a model for fixed angle scattering. The dominant momentum flow through Feynman diagrams at high energies is examined. In spinor electrodynamics this leads to the “eikonal” answer. In scalar electrodynamics we must also consider other flows which cancel between different diagrams. The analysis is carried out in Feynman parameter space. As well as the d-line contributions we also analyse the pinch effects. Although for a given diagram these may be larger they again cancel between diagrams. To leading powers of log s we thus prove the “eikonal” answer for spinor and scalar electrodynamics.
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