We show that the D¯ meson will form narrow bound states with ²⁰⁸Pb. Mean-field potentials for the D⁰, D⁰,and D¯ in ²⁰⁸Pb are calculated self-consistently using the quark-meson coupling model in the local density approximation. The meson-²⁰⁸Pb bound-state energies are then calculated by solving the Klein-Gordon equation with these potentials. The experimental confirmation and comparison with the D⁰ and D⁰ will provide distinctive information on the nature of the interaction between the charmed meson and matter.Tsushima, K. ; Lu, D. ; Thomas, A. ; Saito, K. ; Landau, R

The quark-meson coupling model, based on a mean-field description of nonoverlapping nucleon bags bound by the self-consistent exchange of $\sigma$, $\omega$, and $\rho$ mesons, is extended to investigate the change of hadron properties in finite nuclei. Relativistic Hartree equations for spherical nuclei have been derived from a relativistic quark model of the structure of bound nucleons and mesons. Using this unified, self-consistent description of both infinite nuclear matter and finite nuclei, we investigate the properties of some closed-shell nuclei and study the changes in the hadron masses of the nonstrange vector mesons, the hyperons, and the nucleon in those nuclei. We find a new, simple scaling relation for the changes of the hadron masses, which can be described in terms of the number of nonstrange quarks in the hadron and the value of the scalar mean field in a nucleus.

The energy dependence of the total kaon production cross sections in baryon-baryon $(N$ and $\Delta )$ collisions are studied in the resonance model, which is a relativistic tree-level treatment. This study is the first attempt to complete a systematic consistent investigation of the elementary kaon production reactions for both the pion-baryon and baryon-baryon reactions. Our model suggests that the magnitudes of the isospin-averaged total cross sections for the $N\overrightarrow{N}\mathrm{NYK}$ and $\Delta \overrightarrow{N}\mathrm{NYK}\hspace{0.5em}(Y=\Lambda$ or $\Sigma )$ reactions are almost equal at energies up to about 200 MeV above threshold. However, the magnitudes for the $\Delta N$ reactions become about 6 times larger than those for the $\mathrm{NN}$ reactions at energies about 1 GeV above threshold. Furthermore, the magnitudes of the isospin-averaged total cross sections for the $N\overrightarrow{N}\Delta \mathrm{YK}$ reactions turn out to be comparable to those for the $N\overrightarrow{N}\mathrm{NYK}$ reactions at $\mathrm{NN}$ invariant collision energies about 3.1 GeV, and about 5 to 10 times larger at $\mathrm{NN}$ invariant collision energies about 3.5 GeV. The microscopic cross sections are parametrized in all isospin channels necessary for the transport model studies of kaon production in heavy-ion collisions. These cross sections are then applied in the relativistic transport model to study the sensitivity to the underlying elementary kaon production cross sections.