2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/177757We discuss possibility of the existence of tetraquark states made of four quarks in the string (flux tube) model. The new particle is composed of a diquark and an anti-diquark which are connected by a color flux. It is shown that the vibrational and rotational excited states of the string explain some non-$\bar{q}q$ mesons observed experimentally. Moreover we discuss the decay widths of such tetraquarks with the use of the Schwinger mechanism.5 pages, 6 figuresHigh Energy Physics - Phenomenologytext