The X(3872) and other X,Y,Z Resonances as Hidden Charm Meson-Meson   Molecules
  We report on some ideas concerning the nature of the X(3872) resonance and the need for approximately equal charged and neutral components of $D \bar{D}^* +cc$. Then we discuss how some hidden charm states are obtained from the interaction between vector mesons with charm and can be associated to some of the charmonium-like X,Y,Z states. Finally we discuss how the nature of these states could be investigated through different types of radiative decay. 
E. Oset, D. Gamermann, R. Molina, J.M. Nieves, E. Ruiz Arriola, T.   Branz and Wei Hong Liang
hep-ph nucl-th