Theory Concepts for Heavy Exotic Mesons

Abstract

Some of the currently most popular conjectures for the structure of the recently discovered heavy mesons that do not find a place in the quark model quarkonium spectrum are sketched. Furthermore, some observables are identified that should allow one to identify the most prominent components of individual states.

Comments: 8 pages, 1 figure; Invited plenary talk presented at PANIC 2017,Beijing, China