2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40140The relativistic four-quark equations are found in the framework of the dispersion relation technique. The calculations of non-qq meson amplitudes estimate the contributions of three subamplitudes: four-quark amplitude, glueball amplitude and hadronic molecule amplitudes.15 pages, pdf,two minor typos in the Abstract and the text correctedHigh Energy Physics - Phenomenologytext