Structure and Formation of the Deeply Bound $\bar{p}$ atoms

Abstract

We study theoretically the structure and formation of the deeply bound $\bar{p}$ atoms. We find that the widths of the atomic states are narrower than the level spacing even for deeply bound states so that the well-isolated deeply bound $\bar{p}$ atoms are expected to exist. We also find the $\bar{p}$-nuclear states with huge widths. For the observation of the deep $\bar{p}$-atomic states, we investigate theoretically the $(\bar{p},p)$ reactions for ${}^{12}$C, ${}^{16}$O, and ${}^{31}$P target nuclei. We find that the momentum transfer of the $(\bar{p},p)$ reaction is small and the formation of the $\bar{p}$-atomic states can be observed as the discrete peak structures in the $(\bar{p},p)$ spectrum. We conclude that the $(\bar{p},p)$ reactions are very much suited for the $\bar{p}$ atom formation and the spectra of the reaction are expected to provide new valuable information on the $\bar{p}$ atoms and $\bar{p}$-nucleus interaction.

Comments: 17 pages, 6 figures