Theory overview on spectroscopy

Abstract

A theoretical overview of the exotic spectroscopy in the charm and beauty quark sector is presented. These states are unexpected harvest from the e +e- and hadron colliders and a permanent abode for the majority of them has yet to be found. We argue that some of these states, in particular the Yb(10890) and the recently discovered states Z b(10610) and Zb(10650), discovered by the Belle collaboration are excellent candidates for tetraquark states [bq] [b̄q], with q = u, d light quarks. Theoretical analyes of the Belle data carried out in the tetraquark context is reviewed. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-Share Alike Licence.