科研之友
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摘要
We investigate the role of two- and three-body Lambda-nucleon forces by computing the ground state of a few Lambda-hypernuclei with the Auxiliary Field Diffusion Monte Carlo algorithm. Calculations have been performed for masses up to A = 41, including some open-shell hypernuclei. The results show that the use of a bare hyperon nucleon force fitted on the available scattering data yields a consistent overestimate of the Lambda-separation energy B-Lambda. The inclusion of a hyperon-nucleon-nucleon interaction systematically reduces B Lambda, leading to a qualitatively good agreement with experimental data over the range of masses investigated.
- 出版日期2013-9-20
