Speaker
Andreas von Manteuffel
(Michigan State University)
Description
In this talk, I present the first complete calculation of
form factors to four-loop order in massless QCD. Our results
for the qqA, ggH and bbH vertices confirm the predicted
structure of infrared poles and allow to extract the cusp
and collinear anomalous dimensions. Further, I will discuss
the calculation of three-loop amplitudes for quark and gluon
scattering. We verify predictions for the color quadrupole
contributions to the infrared poles of multi-leg amplitudes
in three-loop QCD.
