Charmonium spectroscopy and decays

TL;DR

This paper reviews recent experimental progress in charmonium spectroscopy, including precise measurements of spin-singlet states, studies of exotic charmonium-like states, and analyses of their transitions and decays.

Contribution

It provides a comprehensive overview of recent experimental findings in charmonium physics, highlighting new measurements and discoveries of exotic states.

Findings

Precise measurements of $ ext{η}_c$, $ ext{η}_c(2S)$, and $h_c$ states.

Observation and analysis of X(3872) and Y states.

Insights into charmonium transitions and decay processes.

Abstract

In this talk, I review the recent experimental developments on charmonium. These mainly include the precision measurements of spin-singlet states $\etac$, $\etac(2S)$, $h_c$, studies of the charmonium-like states X(3872) and the $Y$ states. Charmonium transitions and decays are also discussed.