Charmonium Decays at BESIII

Abstract

Although the charmonium spectrum seems to be well understood and was a role model on how theory and experiment worked hand in hand, the charmonium spectrum still rises questions. For states as hc , χXcJ and ηC(2S), the majority of decay channels is still unknown. Since the charmonium states occur in the transition region of perturbative and non-perturbative QCD, theoretical predictions suffer from large uncertainties. Experimental challenges arise from limited statistics due to the production processes of non vector states. The BESIII collaboration studies extensively the charmonium spectrum and the decay behavior of charmonium states to shed light on the various questions. In this article recent results on charmonium decays studied by BESIII will be presented.