Empirical regularities in the (chi)-dependence of nuclear J/(Psi)suppression

摘要

The measured ratios R(x, A(sub 1)/A(sub 2)) for J/Psi, Psi' and (mu+ mu-) production on two different targets A(sub 1), A(sub 2) as a function of the fractional momentum x of the final state are well fit with a very simple functional form having three adjustable parameters. An empirical relation is found between the three parameters of the fit. The deduced J/Psi absorption cross sections sigma(sub abs) cluster around two values of which only sigma(sub abs)=5.8 + or - 0.2 mb seems acceptable. (orig.) (ERA citation 20:016827)