2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41676We show that in the case of the BFKL pomeron with running coupling the diffusion pattern is strongly modified and is characterised by the sudden tunneling transition to the non-perturbative regime. We suggest that by using the b - expansion method one can suppress the non-perturbative Pomeron and isolate purely perturbative part of the gluon Green's function.5 pages, 2 figures, talk given at 10th International Workshop on Deep Inelastic Scattering (DIS2002), Cracow, Poland, 30 Apr - 4 May 2002High Energy Physics - Phenomenologytext