Speaker
Ben Ruijl
(Nikhef)
Description
We show how an extended version of the R* operation, a method to remove UV and soft IR divergences, can be used to calculate the poles of Feynman diagrams with arbitrary tensor structure from diagrams with fewer loops. We discuss solutions to combinatorial problems we encountered during the computation of the five loop QCD beta function, such as postponing Feynman rule substitutions, integral isomorphisms, and efficient tensor reductions.
Authors
Ben Ruijl
(Nikhef)
Franz Herzog
(CERN)
Takahiro Ueda
(KEK)
Jozef Anton Vermaseren
Andreas Vogt
(University of Liverpool)
