Quark confinement mechanism and the scale $\Lambda_{QCD}$
  The confinement mechanism proposed earlier by the author is applied to problem of arising the so-called scale $\Lambda_{QCD}$ within the framework of QCD. The natural physical assumption consists of that $1/\Lambda_{QCD}\,\sim\,<r>$ where $<r>$ is a characteristic size of hadron (radius of confinement). The above confinement mechanism allows us to calculate $<r>$ for mesons in terms of quark and gluonic degrees of freedom and this permits to conclude that $\Lambda_{QCD}$ should slightly change from hadron to hadron. 
Yu. P. Goncharov
hep-ph hep-th