The High E_T Drop of J/psi to Drell-Yan Ratio from the Statistical c   anti-c Coalescence Model
  The dependence of the J/psi yield on the transverse energy E_T in heavy ion collisions is considered within the statistical c anti-c coalescence model. The model fits the NA50 data for Pb+Pb collisions at the CERN SPS even in the high-E_T region (E_T > 100 GeV). Here E_T-fluctuations and E_T-losses in the dimuon event sample naturally create the celebrated drop in the J/psi to Drell-Yan ratio. 
A.P. Kostyuk, M.I. Gorenstein, H. Stoecker, and W. Greiner