J/Psi mass shift in nuclear matter

The $J\mathrm{/}\mathrm{\Psi }$ mass shift in cold nuclear matter is computed using an effective Lagrangian approach. The mass shift is computed by evaluating $D$ and $D^{\ast }$ meson loop contributions to the $J\mathrm{/}\mathrm{\Psi }$ self-energy employing medium-modified meson masses. The modification of the $D$ and $D^{\ast }$ masses in nuclear matter is obtained using the quark-meson coupling model. The loop integrals are regularized with dipole form factors and the sensitivity of the results to the values of form-factor cutoff masses is investigated. The $J\mathrm{/}\mathrm{\Psi }$ mass shift arising from the modification of the $D$ and $D^{\ast }$ loops at normal nuclear matter density is found to range from -16 MeV to -24 MeV under a wide variation of values of the cutoff masses. Experimental perspectives for the formation of a bound state of $J\mathrm{/}\mathrm{\Psi }$ to a nucleus are investigated.