Quark and gluon form factors to three loops.
We compute the form factors of the photon-quark-anti-quark vertex and the effective vertex of a Higgs-boson and two gluons to three-loop order within massless perturbative quantum chromodynamics. These results provide building blocks for many third-order cross sections. Furthermore, this is the first calculation of complete three-loop vertex corrections.
Baikov
P A
PA
Skobeltsyn Institute of Nuclear Physics of Moscow State University, 119992 Moscow, Russia.
Chetyrkin
K G
KG
Smirnov
A V
AV
Smirnov
V A
VA
Steinhauser
M
M