Determining arbitrary Feynman integrals by vacuum integrals
Xiao Liu, Yan-Qing Ma · Physical review. D/Physical review. D. · 2019
This work introduces a new method for evaluating loop Feynman integrals by relating them, via analytic continuation, to a series of vacuum integrals. The technique is demonstrated via two-loop gg->ggg and gg->HH and is found to compare favorably with existing methods.