Strong coupling constant and flavor thresholds in QCD

摘要

NLO QCD analysis of the world unpolarized and polarized deep-inelastic experimental data were performed in order to extract the QCD and s(M). In this paper we use the QCD which can be obtain from the polarized deeply inelastic scattering. By having the QCD, one can determine the s(M). We compare all of different NLO measurements of the strong coupling constant in unpolarized and polarized deeply inelastic scattering.