Deciphering the XYZ States

Abstract

I give a brief account of current topics in description of exotic multiquark mesonic resonances with hidden heavy ($c$ or $b$) flavor, the so-called XYZ states, in terms of hadronic molecules and hadro-quarkonium systems. Also discussed are the recently observed hidden-charm pentaquarks including additional ways of producing them in experiments.

Comments: Talk at the Flavor Physics and CP Violation Conference, Victoria BC, May 2019. 7 pages, 4 figures