Low-lying level structure of Λ hypernuclei and spin dependence of the ΛN interaction with antisymmetrized molecular dynamics
Year: 2020
Type: article
Abstract: $\mathrm{\ensuremath{\Lambda}}N$ spin-spin and spin-orbit splittings in low-lying excitation spectra are investigated for $p$-shell $\mathrm{\ensuremath{\Lambda}}$ hypernuclei on the basis of the microscopic structure calculation within the antisymmetrized molecular dynamics, where the $\mathrm{\ensuremath{\Lambda}}N\phantom{\rule{4pt}{0ex}}G$-matrix interaction derived from the baryon-baryon interaction model ESC (extended soft core) is used. It is found that the ground-state spin-parity is systematically reproduced in the $p$-shell $\mathrm{\ensuremath{\Lambda}}$ hypernuclei by tuning the $\mathrm{\ensuremath{\Lambda}}N$ spin-spin and spin-orbit interactions so as to reproduce the experimental data of $_{\mathrm{\ensuremath{\Lambda}}}^{4}\mathrm{H},_{\mathrm{\ensuremath{\Lambda}}}^{7}\mathrm{Li}$, and $_{\mathrm{\ensuremath{\Lambda}}}^{9}\mathrm{Be}$. Furthermore, we also focus on the excitation energies of the excited doublets as well as the energy shifts of them by the addition of a $\mathrm{\ensuremath{\Lambda}}$ particle.
Source: Physical Review C
Authors: Masahiro Isaka, Yasuo Yamamoto, Toshio Motoba
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2999622864