Abstract
We studied the p̅ interactions with the nuclear medium within the 2009 version of the Paris N̅ N potential model. We constructed the p̅–nucleus optical potential using the Paris S - and P-wave p̅ N scattering amplitudes and treated their strong energy and density dependence self-consistently. We considereda phenomenological P-wave term as well. We calculated p̅ binding energies and widths of the p̅ bound in various nuclei. The P-wave potential has very small effect on the calculated p̅ binding energies, however, it reduces the corresponding widths noticeably. Moreover, the S -wave potential based on the Paris amplitudes supplemented by a phenomenological P-wave term yields the p̅ binding energies and widths in very good agreement with those obtained within the RMF model consistent with p̅-atom data.
Highlights
The antiproton–nucleus interaction below threshold have been so far studied within phenomenological RMF approaches [1, 2]
The poptical potential was confronted with patom data
The Paris S -wave potential supplemented by a phenomenological P-wave term was found to fit the data on low-density, near-threshold p-nucleus interaction
Summary
The antiproton–nucleus interaction below threshold have been so far studied within phenomenological RMF approaches [1, 2]. It is desirable to study the pinteractions with the nuclear medium within other theoretical approaches, such as microscopic models of N N interaction based on mesonexchange models [3,4,5] or chiral N N interaction models [6, 7] Comparison between these N N interaction models could bring valuable information about in-medium pinteractions in the direct confrontation with the data from patoms and pscattering off nuclei, as well as predictions for p-nuclear quasi-bound states. The Paris S -wave potential supplemented by a phenomenological P-wave term was found to fit the data on low-density, near-threshold p-nucleus interaction This fact stimulated us to apply it in the present calculations of p-nuclear quasi-bound states and explore the effect of the P-wave interaction on pbinding energies and widths of p-nuclear states.
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