Fully coupled channel approach to doubly strange s-shell hypernuclei.
Fully coupled channel approach to doubly strange s-shell hypernuclei.
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DOI：
10.1103/physrevlett.94.202502
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发表时间：
2004-07
影响因子：
8.6
通讯作者：
H. Nemura;S. Shinmura;Y. Akaishi;K. Myint
中科院分区：
文献类型：
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作者：
H. Nemura;S. Shinmura;Y. Akaishi;K. Myint
我们描述了从头计算的双奇怪，S =-2，S-壳层超核（4（λ-λ）H，5（λ-λ）H，5（λ-λ）He，和6（λ-λ）He）作为第一次尝试，探索这些系统的全耦合通道计划的少体问题。波函数包括LambdaLambda、LambdaSigma、NXi和SigmaSigma通道。使用Minnesota NN、D2' YN和基于Nijmegen硬核模型的模拟YY电位。得到了这些系统的有界解。我们发现，在S = 0，-1，-2扇区中八重态重子间的一组唯象B8 B8相互作用，与S = 0，-1，-2 s壳层（超）核的所有实验结合能相一致，可以预言4（λ-λ）H的粒子稳定束缚态.对于5（Lambda-Lambda）H和5（Lambda-Lambda）He，LambdaN-SigmaN和XiN-LambdaSigma势显著地影响净Lambda-NXi耦合，并且即使对于较弱的Lambda-NXi势也获得了大的Xi几率.
We describe ab initio calculations of doubly strange, S = -2, s-shell hypernuclei (4(LambdaLambda)H, 5LambdaLambda)H, 5(LambdaLambda)He, and 6(LambdaLambda)He) as a first attempt to explore the few-body problem of the full-coupled channel scheme for these systems. The wave function includes LambdaLambda, LambdaSigma, NXi, and SigmaSigma channels. Minnesota NN, D2' YN, and simulated YY potentials based on the Nijmegen hard-core model are used. Bound-state solutions of these systems are obtained. We find that a set of phenomenological B8B8 interactions among the octet baryons in S = 0,-1, and -2 sectors, which is consistent with all of the available experimental binding energies of S = 0,-1, and -2 s-shell (hyper)nuclei, can predict a particle stable bound state of 4(LambdaLambda)H. For 5(LambdaLambda)H and 5(LambdaLambda)He, LambdaN-SigmaN and XiN-LambdaSigma potentials significantly affect the net LambdaLambda-NXi coupling, and a large Xi probability is obtained even for a weaker LambdaLambda-NXi potential.