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 — preprints:2000:ttp00-17 [2016/03/17 11:03] (current) Line 1: Line 1: + ====== TTP00-17 Two Loop QCD Vertices and Three Loop MOM $\beta$ functions ====== + + + We present numerical results for the two loop QCD corrections to the + ghost gluon vertex, the quark gluon vertex, and the triple gluon vertex in + the massless limit at the symmetric point. We restrict ourselves to the tensor + structures existing in the tree level.  The corrections are used to examine + different coupling constant definitions in momentum subtraction schemes + and the corresponding three-loop $\beta$ functions. + + |**K.G. Chetyrkin and T. Seidensticker**  | + |**  Phys.Lett.  B495 74-80 2000  **  | + | {{preprints:2000:ttp00-17.pdf|PDF}} {{preprints:2000:ttp00-17.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0008094|arXiv]]   | + | |