2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46102We present a QCD bound-state calculation based on a renormalization group-improved light-front Hamiltonian formalism. The QCD Hamiltonian is determined to second order in the coupling, and it includes two-body confining interactions. We make a momentum expansion, obtaining an equal-time-like Schrodinger equation. This is solved for quark-antiquark constituent states, and we obtain a set of self-consistent parameters by fitting B mesons. Applying the approach to charmonium spectra leads to a prediction of the hyperfine splitting between J/$ψ$(1S) and $η_c$(1S) which is in good agreement with experiment.5 pages. Contribution to the proceedings of Hadron Structure 96, Slovakia, Feb. 1996. Companion paper to hep-ph/9604318 by Robert PerryHigh Energy Physics - Phenomenologytext