Five-loop quark mass and field anomalous dimensions for a general gauge   group
  We present analytical five-loop results for the quark mass and quark field anomalous dimensions, for a general gauge group and in the MSbar scheme. We confirm the values known for the gauge group SU(3) from an independent calculation, and find full agreement with results available from large-Nf studies. 
Thomas Luthe, Andreas Maier, Peter Marquard and York Schroder
hep-ph