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arXiv · hep-ph/0005324

A general reduction method for one-loop N-point integrals

G. Heinrich·T. Binoth
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Abstract

In order to calculate cross sections with a large number of particles/jets in the final state at next-to-leading order, one has to reduce the occurring scalar and tensor one-loop integrals to a small set of known integrals. In massless theories, this reduction procedure is complicated by the presence of infrared divergences. Working in n=4-2*epsilon dimensions, it will be outlined how to achieve such a reduction for diagrams with an arbitrary number of external legs. As a result, any integral with more than four propagators and generic 4-dimensional external momenta can be reduced to box integrals.

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G. Heinrich, T. Binoth. 2000-05-31. A general reduction method for one-loop N-point integrals. https://doi.org/10.1016/s0920-5632(00)00850-1

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