2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/30105We show how to resolve coherent low-energy features embedded in a broad high-energy background by use of a fully self-consistent calculation for composite particle operators. The method generalizes the formulation of Roth, which linearizes the dynamics of composite operators at any energy scale. Self-consistent equations are derived and analyzed in the case of the single-impurity SU(N) Kondo model.4 RevTeX pages, 3 embedded EPS figuresStrongly Correlated Electronstext