The 4loop quark mass anomalous dimension and the invariant quark mass
Abstract
We present the analytical calculation of the fourloop quark mass anomalous dimension in Quantum Chromodynamics within the minimal subtraction scheme. On the basis of this result we find that the socalled invariant quark mass is a very good reference mass for the accurate evolution of the running MS quark mass in phenomenological applications. We also obtain for the first time a complete fourthorder perturbative QCD expression for a physical quantity, the total Higgs boson decay rate into hadrons, and analyze the infrared fixed point for this case.
 Publication:

Physics Letters B
 Pub Date:
 February 1997
 DOI:
 10.1016/S03702693(97)006606
 arXiv:
 arXiv:hepph/9703284
 Bibcode:
 1997PhLB..405..327V
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 11 pages, Latex