The Role of Produced Hadrons in J/psi Suppression
  Hadrons produced in high-energy heavy-ion collisions can suppress the production of J/psi and other charmonium states by charmonium spontaneous dissociation as the hot hadronic environment alters the interaction between the charm quark and charm antiquark. Furthermore, hadrons can thermalize a charmonium to excite it to higher charmonium states which subsequently dissociate spontaneously. They can also collide with a charmonium to lead to its prompt dissociation into an open charm pair. 
Cheuk-Yin Wong (ORNL), T. Barnes (ORNL, UTenn), E. S. Swanson   (UPittsburgh, JLab), and Horace W. Crater (UTSI)