Radiative and dilepton decays of the hadronic molecule Zc(3900)+
  The newly observed hidden-charm meson Zc(3900) with quantum numbers J(P) = 1(+) is considered as a hadronic molecule composed of DD*. We give detailed predictions for the decay modes Zc(+) -> J/psi + pi(+) + gamma and Zc(+) -> J/psi + pi(+) + l(+) + l(-) (l = e, mu) in a phenomenological Lagrangian approach. 
Thomas Gutsche, Matthias Kesenheimer, Valery E. Lyubovitskij
hep-ph