Numerical Evaluation of One-Loop Diagrams Near Exceptional Momentum Configurations
W. Giele, E. W. N. Glover, G. Zanderighi
Abstract
One problem which plagues the numerical evaluation of one-loop Feynman diagrams using recursive integration by part relations is a numerical instability near exceptional momentum configurations. In this contribution we will discuss a generic solution to this problem. As an example we consider the case of forward light-by-light scattering.
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