$J/\Psi$-nuclear bound states

Abstract

$J/\Psi$-nuclear bound state energies are calculated for a range of nuclei by solving the Proca (Klein-Gordon) equation. Critical input for the calculations, namely the medium-modified $D$ and $D^{\ast }$ meson masses, as well as the nucleon density distributions in nuclei, are obtained from the quark-meson coupling model. The attractive potential originates from the $D$ and $D^{\ast }$ meson loops in the $J/\Psi$ self-energy in nuclear medium. It appears that $J/\Psi$-nuclear bound states should produce a clear experimental signature provided that the $J/\Psi$ meson is produced in recoilless kinematics.

Comments: 11 pages, 4 figures, 1 table, to appear in Phys. Rev. C. Further comments on the width of J/Psi-nuclear states, effective Lagrangians, and new references