Year: 2022
Type: article
Abstract: We perform the ab initio no-core shell model (NCSM) calculation to investigate the bound state problem of the three-body $\mathrm{\ensuremath{\Lambda}}nn$ system in chiral next-to-next-to-leading-order $NN$ and chiral leading-order $YN$ interactions. The calculations show that no $\mathrm{\ensuremath{\Lambda}}nn$ bound state exists, but predict a low-lying $\mathrm{\ensuremath{\Lambda}}nn$ resonant state near the threshold with an energy of ${E}_{r}=0.124$ MeV and a width of about $\mathrm{\ensuremath{\Gamma}}=1.161$ MeV. In searching for $\mathrm{\ensuremath{\Lambda}}nn$ resonances, we extend the NCSM calculation to the continuum state by employing the $J$-matrix formalism in the scattering theory with the hyperspherical oscillator basis.
Source: Physical Review C
Authors: Thiri Yadanar Htun, Yupeng Yan
Institutions: Mandalay University, Suranaree University of Technology
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4282000164