Abstract
Data on 120 GeV photoproduction ofJ/Ψ's in nuclear targets are re-examined to extract the absorption cross section forJ/Ψ's in high energy collisions with nucleons. We find σa=6.6±2.2 mb in contrast with an earlier estimate of 1–2 mb. Comparison of low and high energy data on photon producedJ/Ψ's thus no longer show possible evidence for observable effects of color screening. Examination of representative data on the Feynmanx distributions ofJ/Ψ production by hadrons demonstrates how to extract both the total inelasticJ/Ψ-nucleon cross section and the partial cross section into open charm. We find that the data is inconsistent with any significant contribution from color screening.
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