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Abstract
We calculated antibaryon bound states in selected nuclei within the relativistic mean-field (RMF) model. The G-parity motivated B̄-meson coupling constants were scaled to yield corresponding potentials consistent with available experimental data. Large polarization of the nuclear core caused by B̄ was confirmed. The p̄ annihilation in the nuclear medium was incorporated by including a phenomenological imaginary part of the optical potential. The calculations using a complex p̄-nucleus potential were performed fully self-consistently. The p̄ widths significantly decrease when the phase space reduction is considered for p̄ annihilation products, but they still remain sizeable for potentials consistent with p̄-atom data.
Highlights
The study of antibaryon–nucleus interactions has attracted increasing interest in recent years at the prospect of future experiments at the FAIR facility [1]
Much attention has been devoted to the antiproton–nucleus interaction and the possibility of formation of p–nucleus bound states [2, 3, 4]
One of the motivations for our study of p–nucleus bound states is the conjecture that the considerable suppression of the phase space for the pannihilation products in the nuclear medium could lead to relatively long living pinside the nucleus [2]
Summary
The study of antibaryon–nucleus interactions has attracted increasing interest in recent years at the prospect of future experiments at the FAIR facility [1]. One of the motivations for our study of p–nucleus bound states is the conjecture that the considerable suppression of the phase space for the pannihilation products in the nuclear medium could lead to relatively long living pinside the nucleus [2]. We report on our recent fully self-consistent calculations of antibaryon– nucleus bound states within the relativistic mean-field model [5].
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