D ∗ molecular states

In this talk we address two topics: The first one is an empirica l explanation in terms of a new state h1 of the peak in the K ∗0 ¯ K ∗0 invariant mass distribution close to threshold of this channel in the J/ → �K ∗0 ¯ K ∗0 decay. The second one is a theoretical description of the isospin I = 1 Zc(3900) and Zc(4020) states in terms of molecular states of D ¯ D ∗ + cc and D ∗ ¯ D ∗ .