Recent progress on the study of the charmoniumlike states

TL;DR

This review summarizes recent experimental discoveries of charmoniumlike states from various collider experiments, highlighting new particles and states such as X(3872), Y states, and Z_c^- states, advancing understanding of exotic hadrons.

Contribution

It provides a comprehensive overview of recent experimental progress on charmoniumlike states, emphasizing new findings from multiple collider experiments.

Findings

Observation of the X(3872) state

Identification of new Y vector states

Discovery of charged Z_c^- states

Abstract

In this article, we review the recent experimental studies on the charmoniumlike states, mainly from the e+e- annihilation experiments BESIII, Belle, BaBar, and CLEO-c, and the hadron collider experiment LHCb. We discuss the results on the X(3872), the vector Y states [Y(4008), Y(4660), and those in e+e- to pi+pi-h_c], and the charged charmoniumlike Z_c^- states.