Recent Results in Charmonium Spectroscopy at B-factories

TL;DR

This paper reviews recent experimental findings in charmonium spectroscopy from B-factories, highlighting new states like X(3872) that challenge traditional charmonium models.

Contribution

It provides a comprehensive overview of recent experimental results on charmonium-like states above the D D̄ threshold from BaBar and Belle collaborations.

Findings

Discovery of X(3872) above D D̄ threshold

Multiple new charmonium-like states reported

Some states do not fit conventional models

Abstract

Charmonium spectroscopy gained renewed interest after the discovery in 2003 of the unpredicted X(3872) charmonium-like state, above the $D\overline{D}$ threshold. To date many charmonium-like states above the $D\overline{D}$ threshold have been claimed. Some of these states do not easily fit the conventional charmonium picture. In this article we review recent experimental results in this field, reported by the BaBar and Belle Collaborations.