Production of exotic charmonium in $\gamma \gamma$ interactions at   hadronic colliders
  In this paper we investigate the Exotic Charmonium (EC) production in $\gamma \gamma$ interactions present in proton-proton, proton-nucleus and nucleus-nucleus collisions at the CERN Large Hadron Collider (LHC) energies as well as for the proposed energies of the Future Circular Collider (FCC). Our results demonstrate that the experimental study of these processes is feasible and can be used to constrain the theoretical decay widths and shed some light on the configuration of the considered multiquark states. 
B. D. Moreira, C. A. Bertulani, V. P. Goncalves, F. S. Navarra
hep-ph hep-ex nucl-ex nucl-th