Hyperonic mixing in five-baryon double-strangeness hypernuclei in a two-channel treatment
Hyperonic mixing in five-baryon double-strangeness hypernuclei in a two-channel treatment
复制标题
双通道处理中五重子双奇异超核的高超声混合
DOI：
10.1103/physrevc.69.014303
复制
发表时间：
2003
影响因子：
3.1
通讯作者：
Y. Yamamoto
中科院分区：
文献类型：
--
作者：
D. Lanskoy;Y. Yamamoto
用双通道方法研究了超核H和He的性质，显式处理了通道^3\Text{Z}+Lambda+Lambda和α+xi的耦合.从Nijmegen介子交换模型出发，在G-矩阵程序中推导出了对角\Lambda\Lambda和耦合\Lambda\Lambda-Xi N相互作用。由于沟道耦合，$5$He中的键能大大超过了$5$H中的键能。对角线吸力放大了这种效应，这种效应对波长-核相互作用也很敏感。λB_{\Lambda\Lambda}值的差异可以是\Lambda\Lambda超核中的Lambda-Xi N耦合的一个明确的特征。然而，为了从未来的Lambda-Lambda超核结合能数据中定量地提取耦合强度，需要改进对超子-核势的了解。
Properties of hypernuclei $_{\Lambda \Lambda}^5$H and $_{\Lambda \Lambda }^5$He are studied in a two-channel approach with explicit treatment of coupling of channels ^3\text{Z}+\Lambda+\Lambda and \alpha+\Xi. Diagonal \Lambda\Lambda and coupling \Lambda\Lambda-\Xi N interactions are derived within G-matrix procedure from Nijmegen meson-exchange models. Bond energy \Delta B_{\Lambda\Lambda} in $_{\Lambda \Lambda}^5$He exceeds significantly that in $_{\Lambda \Lambda}^5$H due to the channel coupling. Diagonal \Xi\alpha attraction amplifies the effect, which is sensitive also to \Lambda-core interaction. The difference of the \Delta B_{\Lambda\Lambda} values can be an unambiguous signature of the \Lambda\Lambda-\Xi N coupling in \Lambda\Lambda hypernuclei. However, improved knowledge of the hyperon-nucleus potentials is needed for quantitative extraction of the coupling strength from future data on the \Lambda\Lambda hypernuclear binding energies.
轻双Λ超核中的ΛΛ-ΞΝ耦合效应
DOI：
--
发表时间：
2003
期刊：
Nuclear Physics A 721
影响因子：
--
作者：
Khin Swe Myint;S.Shinmura;Y.Akaishi
通讯作者：
Y.Akaishi