G-Matrix Approach to Hyperon-Nucleus Systems
G-Matrix Approach to Hyperon-Nucleus Systems
复制标题
Hyperon-Nucleus 系统的 G 矩阵方法
DOI：
10.1143/ptps.185.72
复制
发表时间：
2010
影响因子：
--
通讯作者：
T. Rijken
中科院分区：
文献类型：
--
作者：
Y. Yamamoto;T. Motoba;T. Rijken
基于G-矩阵理论，研究了新的YN·YY相互作用模型ESC08的性质。核物质中的G矩阵计算是在ΛN-、ΣN-、ΞN-和ΛΛ启动通道的情况下进行的。在ΛN情况下，自旋-自旋和自旋轨道项具有合理的强度。对Λ超核的观测光谱进行了广泛的折叠模型分析。实验的能谱被很好地重现。利用G矩阵相互作用对典型的Λ超核进行了壳模型分析。在ΣN情形下，由于ESC08唯象地考虑了夸克泡利禁忌态的影响，得到了UΣ的排斥值。在ΞN情况下，UΞ的中等吸引值主要是由于3S1T=1ΞNΛΣ-ΣΣ耦合态的强吸引贡献，这导致了Ξ超核的广泛存在.在ΛΛ情况下，由ESC08得到的B-ΛΛ值与实验值一致。
The properties of the new YN · YY interaction model ESC08 are studied on the basis of the G-matrix theory. G-matrix calculations in nuclear matter are performed in the cases of ΛN -, ΣN -, ΞN -a ndΛΛ -starting channels. In the ΛN case, the spin-spin and spinorbit terms are shown to be of reasonable strengths. The folding-model analyses are done extensively for observed spectra of Λ hypernuclei. The experimental energy spectra are nicely reproduced. The shell-model analyses for typical Λ hypernuclei are performed with the Gmatrix interactions. In the ΣN case, the repulsive values of UΣ are obtained owing to the effect of the quark Pauli-forbidden states which are taken into account phenomenologically in ESC08. In the ΞN case, the moderately attractive values of UΞ are obtained mainly due to the strongly attractive contributions in 3 S1 T =1 ΞN -ΛΣ -ΣΣ coupled states, which leads to extensive existence of Ξ hypernuclei. In the ΛΛ case, the BΛΛ values derived from ESC08 are found to be consistent with the experimental values.