2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42994I present some recent applications of a light cone QCD-inspired model with the mass squared operator consisting of a harmonic oscillator potential as confinement in the meson spectra. The model gives an universal and satisfactory description of both singlet and triplet states of S-wave mesons. In the present work P-wave D_s mesons are also investigated. The mass of the recently found meson, D_s(2317) is reproduced fairly well by this simple model.4 pages, no figures, LaTeX2e, CERN report style. Talk given in the Light Cone Workshop 2003 (LC03), DurhamHigh Energy Physics - Phenomenologytext