Antibaryon—nucleus bound states

FAIR Next Generation ScientistS 2014

Hrtánková, J.^1,2 ; Mare, J.^1

Nuclear Physics Institute, e

25068, Czech Republic^1

Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Behová 7, Prague 1

115 19, Czech Republic^2

关键词: Annihilation products;    Bound state;    Coupling constants;    Imaginary parts;    Mean-field;    Nuclear medium;    Optical potential;    Phase spaces;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/599/1/012007/pdf
DOI  :  10.1088/1742-6596/599/1/012007

来源: IOP

【 摘 要 】

We calculated antibaryon (B=p,p,σ) bound states in selected nuclei within the relativistic meanfield (RMF) model. The G-parity motivated B-meson coupling constants were scaled to yield corresponding potentials consistent with available experimental data. Large polarization of the nuclear core caused by B was confrmed. The p annihilation in the nuclear medium was incorporated by including a phenomenological imaginary part of the optical potential. The calculations using a complex p-nucleus potential were performed fully self-consistently. The p widths significantly decrease when the phase space reduction is considered for p annihilation products, but they still remain sizeable for potentials consistent with p atom data.