Modified Renormalon

In the framework of renormalon consideration in the approximation of a large number of quark flavours, a role of the anomalous dependence of gluon propagator on the scale µ is shown. In the QCD perturbation theory, an account for the next-to-leading order term over α s is connected with the uncertainty, caused by a choice of the energy scale, determining the α s (µ 2) value, since the transition to the ¯ µ scale leads to the substitution α s (µ 2) ≈ α s (¯ µ 2)