Formation spectra of charmed meson–nucleus systems using an antiproton beam

摘要

We investigate the structure and formation of charmed meson–nucleus systems, with the aim of understanding the charmed meson–nucleon interactions and the properties of the charmed mesons in the nuclear medium. The D ˉ mesic nuclei are of special interest, since they have tiny decay widths due to the absence of strong decays for the D ˉ N pair. Employing an effective model for the D ˉ N and DN interactions and solving the Klein–Gordon equation for D ˉ and D in finite nuclei, we find that the D ? – 11 B system has 1 s and 2 p mesic nuclear states and that the D 0 – 11 B system binds in a 1 s state. In view of the forthcoming experiments by the PANDA and CBM Collaborations at the future FAIR facility and the J-PARC upgrade, we calculate the formation spectra of the [ D ? – 11 B] and [ D 0 – 11 B] mesic nuclei for an antiproton beam on a 12 C target. Our results suggest that it is possible to observe the 2 p D ? mesic nuclear state with an appropriate experimental setup.