Narrowing the uncertainty on the total charm cross section and its   effect on the J/\psi\ cross section
  We explore the available parameter space that gives reasonable fits to the total charm cross section to make a better estimate of its true uncertainty. We study the effect of the parameter choices on the energy dependence of the J/\psi\ cross section. 
R. Nelson, R. Vogt and A. D. Frawley
hep-ph nucl-th