The hypernuclei (4)(lambda)He and (4)(lambda)H: challenges for modern hyperon-nucleon forces.
The hypernuclei (4)(lambda)He and (4)(lambda)H: challenges for modern hyperon-nucleon forces.
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DOI：
10.1103/physrevlett.88.172501
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发表时间：
2001-12
影响因子：
8.6
通讯作者：
A. Nogga;H. Kamada;W. Glöckle
中科院分区：
文献类型：
--
作者：
A. Nogga;H. Kamada;W. Glöckle
超核(4)(Lambda)He和(4)(Lambda)H提供了关于超子-核子相互作用的重要信息。基于Nijmegen Sc Yn相互作用给出了0(+)基态和1(+)激发态的Lambda分离能的Faddeev-Yakubovsky精确计算.我们明确地将西格玛混合考虑在内。考虑了重子的质量差和相互作用的电荷依赖性。结果表明，Nijmegen模型不能同时预测所有的分离能，这暗示了当前相互作用模型的失败。指出(4)(Lambda)He和(4)(Lambda)H的Lambda分离能的差异是探索YN相互作用模型的有趣的观测数据。
The hypernuclei (4)(Lambda)He and (4)(Lambda)H provide important information on the hyperon-nucleon interaction. We present accurate Faddeev-Yakubovsky calculations for the Lambda separation energies of the 0(+) ground and the 1(+) excited states based on the Nijmegen SC YN interactions. We explicitly take the Sigma admixture into account. Mass differences of the baryons and the charge dependence of the interaction are considered. The results show that the Nijmegen models cannot predict all separation energies simultaneously hinting to failures of the current interaction models. It is pointed out that the differences of the Lambda separation energies of (4)(Lambda)He and (4)(Lambda)H are interesting observables to probe the YN interaction models.