EMPIRICAL REGULARITIES IN THE X-DEPENDENCE OF J PSI SUPPRESSION IN HADRON-NUCLEUS COLLISIONS/

The measured ratios R(x, A(1)/A(2)) for J/Psi, Psi' and mu(+)mu(-) pro duction on two different nuclear targets A(1), A(2) as a function of t he fractional momentum x of the final state are fitted well with a ver y simple functional form having three adjustable parameters. An empiri cal relation is found between the three parameters of the fit. These o bservations could guide the way to a deeper understanding of the nucle ar effects involved. The deduced J/Psi nucleon absorption cross sectio ns sigma(abs) cluster around two values of which only sigma(abs) = 5.8 +/- 0.2 mb seems acceptable.