2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42802The ${q}\bar{q}$ spectrum is studied within a chiral constituent quark model. It provides with a good fit of the available experimental data from light (vector and pseudoscalar) to heavy mesons. The new $D$ states measured at different factories are studied. The $0^{++}$ light mesons are analyzed as $q\bar q$ pairs or tetraquark structures.9 pages, 3 figures. Contribution to the NAPP 2003 ConferenceHigh Energy Physics - Phenomenologytext