New open and hidden charm spectroscopy
  Many new results on open and hidden charm spectroscopy have been obtained recently. We present a short review of the experimental findings in the meson sector, of the theoretical interpretations and of the open problems, with a discussion on the possibility that some mesons are not quark-antiquark states. 
P.Colangelo, F.De Fazio, R.Ferrandes, S.Nicotri