Hadrons with charmed quarks in matter
  We investigate the $D{\bar D}$ decay width of excited charmonium states at finite nuclear density with simultaneous modification of both $D$ and ${\bar D}$ mesons in nuclear matter. The strongest effect is found for the $\Psi^{\prime}$ meson. The medium modification can be detected by dilepton spectroscopy as substantial $\Psi^{\prime}$ broadening and anomalous $\Psi^{\prime}$ absorption. 
A. Sibirtsev