Signature of an $h_1$ state from $J/\psi \to \eta K^{*0}\bar{K}^{*0}$   and theoretical description of the $Z_c(3900)$ and $Z_c(4020)$ as $D \bar   D^*$ and $D^* \bar D^*$ molecular states
  In this talk we address two topics: The first one is an empirical explanation in terms of a new state $h_1$ of the peak in the $K^{*0}\bar{K}^{*0}$ invariant mass distribution close to threshold of this channel in the $J/\psi \to \eta K^{*0}\bar{K}^{*0}$ decay. The second one is a theoretical description of the isospin $I=1$ $Z_c(3900)$ and $Z_c(4020)$ states in terms of molecular states of $D \bar D^*+ cc$ and $D^* \bar D^*$. 
E. Oset, J.J. Xie, M. Albaladejo, F. Aceti, M. Bayar, J.M. Dias, A.   Martinez Torres, K. Khemchandani, M. Nielsen, F. Navar...
hep-ph