Effects of hyperonic many-body force on B_Lambda values of hypernuclei
Effects of hyperonic many-body force on B_Lambda values of hypernuclei
复制标题
高超声速多体力对超核B_Lambda值的影响
DOI：
10.1103/physrevc.95.044308
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发表时间：
2017
影响因子：
3.1
通讯作者：
and Th. A. Rijken
中科院分区：
文献类型：
--
作者：
M. Isaka;Y. Yamamoto;and Th. A. Rijken
给出中子星质量的刚性状态方程（EoS）表明，不仅在核子通道中，而且在超声波通道中，强排斥多体效应（MBE）也是存在的。作为分子束外延的一个特殊模型，排斥性多坡密子交换势（MPP）与唯象的三体吸引力一起被加入到两体相互作用中。对于各种版本的奈梅亨相互作用模型，分子束外延部分被确定，以便再现的观测数据。的质量依赖性的值被证明是再现以及通过添加分子束外延的强大MPP排斥，确保硬EoS的超子混合中子星物质，在其中所采用的相互作用模型的状态组件导致几乎消失的贡献。本文在平均密度近似（ADA）的基础上导出了核物质-矩阵相互作用，并将其应用于超核。在反对称化分子动力学框架下，利用强和弱MPP排斥两种类型的矩阵相互作用，分析了超核的值。在几百keV范围内，计算值与实验值吻合较好.当ADA也适用于弱束缚态时，也能很好地再现态的值。
The stiff equation of state (EoS) giving the neutron-star mass ofsuggests the existence of strongly repulsive many-body effects (MBE) not only in nucleon channels but also in hyperonic ones. As a specific model for MBE, the repulsive multi-Pomeron exchange potential (MPP) is added to the two-body interaction together with the phenomenological three-body attraction. For various versions of the Nijmegen interaction models, the MBE parts are determined so as to reproduce the observed data of. The mass dependence ofvalues is shown to be reproduced well by adding MBE to the strong MPP repulsion, assuring the stiff EoS of hyperon-mixed neutron-star matter, in which-state components of the adopted interaction model lead to almost vanishing contributions. The nuclear matter-matrix interactions are derived and used inhypernuclei on the basis of the averaged-density approximation (ADA). Thevalues of hypernuclei withare analyzed in the framework of antisymmetrized molecular dynamics with use of the two types of-matrix interactions including strong and weak MPP repulsions. The calculated values ofreproduce the experimental data well within a few hundred keV. The values ofinstates also can be reproduced well, when the ADA is modified to be suitable also for weakly boundstates.