2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/45371The equation proposed by N.N.Nikolaev, B.G.Zakharov and V.R.Zoller for the colour dipole cross-section is compared with the BFKL equation for the hard pomeron for the $SU(2)$ colour group. It is demonstrated that for a fixed coupling constant the difference between the two equations is due to a different manner to introduce the gluon mass.8 pages, LaTeX, no figuresHigh Energy Physics - Phenomenologytext