X(3872) and Its Iso-Triplet Partners
  Decays of X(3872) and its partners as hidden-charm axial-vector tetra-quark mesons are studied. As the result, it is seen that the iso-triplet partners of X(3872) can be broad, and therefore, higher statistics would be needed to find them. 
Kunihiko Terasaki
hep-ph hep-ex nucl-th