XYZ States

Abstract

In the past decade, many new charmonium (or charmonium-like) and bottomonium (or bottomonium-like) states were observed experimentally. I will review these XYZ states which do not fit into the quark model spectrum easily.

Plenary talk at the XV International Conference on Hadron Spectroscopy-Hadron 2013, 4-8 November 2013, Nara, Japan