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

Abstract

Recent experimental results on charmonium $h_c{(}^1{P}_1)$, ${\eta }_c(1S)$ 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 ${\psi }^{\prime }$ decays are discussed.

arXiv comment11 pages, 10 figues, to appear in the proceedings of The 5th International Workshop on Charm Physics (Charm 2012)