title: Quark and gluon form factors to three loops.
abstract: 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.
authors.affiliation: Skobeltsyn Institute of Nuclear Physics of Moscow State University, 119992 Moscow, Russia.
authors.forename: P A
authors.initials: PA
authors.lastname: Baikov
authors.forename: K G
authors.initials: KG
authors.lastname: Chetyrkin
authors.forename: A V
authors.initials: AV
authors.lastname: Smirnov
authors.forename: V A
authors.initials: VA
authors.lastname: Smirnov
authors.forename: M
authors.initials: M
authors.lastname: Steinhauser