A Review of h_c(1P1), eta_c(1S) and eta_c(2S)

TL;DR

This paper reviews recent experimental findings on specific charmonium states, including their production, properties, and decay behaviors, based on data from major particle physics experiments.

Contribution

It provides a comprehensive summary of recent experimental results on h_c(1P1), eta_c(1S), and eta_c(2S) charmonium states, highlighting new observations and measurements.

Findings

Observation of eta_c(2S) in psi' decays

Detailed analysis of h_c production and properties

Insights into eta_c(1S) lineshape and decay characteristics

Abstract

Recent experimental results on charmonium $h_c(^1P_1)$, $\eta_c(1S)$ and $\eta_c(2S)$ from Belle, BaBar, CLEO and BESIII are reviewed. $h_c$ production and properties, the $\eta_c(1S)$ lineshape and the observation of $\eta_c(2S)$ in $\psi'$ decays are discussed.