====== TTP09-05 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. |**P.A. Baikov, K.G. Chetyrkin, A.V. Smirnov, V.A. Smirnov, M. Steinhauser** | |** Phys.Rev.Lett. 102 212002 2009 ** | | {{preprints:2009:ttp09-05.pdf|PDF}} {{preprints:2009:ttp09-05.ps|PostScript}} [[http://arxiv.org/abs/0902.3519|arXiv]] | | |