On the Origin of the $XYZ$ Mesons

Abstract

In this talk we present a mechanism giving rise to exotic $XYZ$ four-quark states in the meson spectra within a constituent quark model approach. We discuss its generalization to five-quark states in the heavy baryon sector. Finally, we revise some other works in the literature and experimental data where this mechanism may be working.

Comments: 6 pages, 2 figures. Talk presented at the Hadron 2015 Conference. To appear in AIP Conference Proceedings