A QCD Calculation of the Interaction of Quarkonium with Nuclei

The interaction of quarkonium with nuclei is studied in the mQ → ∞ limit of QCD, where the binding energy is found to be exactly computable. The dominant contribution to the interaction is from two-gluon operators. The forward matrix elements of these twogluon operators can be determined from the QCD scale anomaly, and from deep inelastic scattering. We apply our results to the Υ and J/ψ, treating the QQ interaction as purely Coulombic. We find the Υ binds in nuclear matter with a binding energy of a few MeV, while for the J/ψ binding is of order 10 MeV. For the J/ψ in particular we expect confinement effects to produce large corrections to this result. UCSD/PTH 92-12 March 1992