2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/188412We apply Bogolubov approach to QCD to demonstrate a spontaneous generation of three-gluon gauge invariant effective interaction which contributes significantly at the infrared region. The contribution of this interaction to $α_s(p^2)$ leads to description of its behaviour in correspondence to phenomenology and lattice calculations without introduction of any additional parameter.8 pages, 3 figures, corrected types, precision of calculations improved, one figure addedHigh Energy Physics - Phenomenologytext