(D)over-barand B mesons in a nuclear medium

We discuss the mass modifications of (D) over bar and (D) over bar * (B and B*) mesons in nuclear medium. The heavy quark symmetry for (D) over bar and (D) over bar* (B and B*) mesons is adopted, and the interaction between a (D) over bar or (D) over bar* (B or B*) meson and a nucleon is supplied from the pion exchange. We find negative mass shifts for (D) over barD and B mesons, and hence that the (D) over barD and B mesons are bound in the nuclear medium. As applications, we consider the atomic nuclei with a (D) over bar meson, Ca-40((D) over bar) and Pb-208(), and investigate the energy levels of the (D) over bar meson in each nucleus. We also discuss the mass shifts in the isospin asymmetric nuclear medium, and present a possible phenomenon of distribution of isospin density around a (D) over bar or B meson in nuclear medium. We find that the mass shifts of (D) over bar* and B* mesons have large imaginary parts, which would prevent precise study of the energy levels of (D) over bar* and B* mesons in nuclei. DOI: 10.1103/PhysRevC.87.015202