I was reading a paper that gives a nice collection of all scalar integrals that crop up in QCD loop calculations. Such integrals are computed in some kinematic region and then the authors say the results may be analytically continued if so desired. I just wonder how is this analytic continuation done in practice? It's a relatively short paper and I've pasted it here https://arxiv.org/pdf/0712.1851.pdf(adsbygoogle = window.adsbygoogle || []).push({});

Thanks!

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# I Analytically continuing 2,3,4pt integrals

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