Quarkonium States at B-Factories

TL;DR

This paper reviews recent advances in quarkonium spectroscopy at B-factories, highlighting new charmonium-like resonances and decay measurements of bottomonium states, emphasizing ongoing debates about their true nature.

Contribution

Provides an updated overview of charmonium-like resonances and bottomonium decay properties, summarizing recent experimental progress and controversies.

Findings

Discovery of new charmonium-like resonances

Updated decay measurements of bottomonium states

Ongoing debates about resonance classifications

Abstract

An overview is given on recent progress in the study of quarkonium spectroscopy at the B-factories. In particular, an updated status report is presented of the long list of "charmonium-like" resonances newly discovered, whose assignment as true charmonium states is in most cases at least controversial. Also, new measurements on the decay properties of bottomonium states above open-B production thresholds are shown.