Radiative decay Y(4260) -> X(3872) + gamma involving hadronic molecular   and charmonium components
  We apply a phenomenological Lagrangian approach to the radiative decay Y(4260) -> X(3872) + gamma. The Y(4260) and X(3872) resonances are considered as composite states containing both molecular hadronic and charmonium components. Having a leading molecular component in the X(3872) and a sole molecular configuration for the Y(4260) results in a prediction compatible with present data. 
Yubing Dong, Amand Faessler, Thomas Gutsche, Valery E. Lyubovitskij
hep-ph