High-energy behavior of renormalized Feynman amplitudes

Abstract

The high-energy polynomial and logarithmic behavior of renormalized Feynman amplitudes, involving subtractions, is derived with total generality when some or all of the external momentum components of the graphs in question become large in Euclidean space nonexceptionally. This is achieved by explicitly carrying out the subtractions of renormalization as dictated, for example, by the improved Dyson–Salam renormalization scheme directly in momentum-space.