超核~5_ΛHe的结合能  

The Binding Energy of the Hypernuclei

作　　者：戴泾明[1] 

机构地区：[1]广东教育学院物理系,广东广州510310

出　　处：《广东教育学院学报》2004年第2期59-61,共3页Journal of Guangdong Education Institute

摘　　要：将轻超核考虑成一个壳心核加上一个粒子的两集团结构,基本的YN相互作用取自于组分夸克模型,采用共振群方法,给出了ΛN相互作用的非定域位,用Kohn Hulth啨n Kato变分法,计算了轻超核5ΛHe的Λ超子的结合能.计算结果表明:手征SU(3)夸克模型能较好地描述系统中短程的非微扰QCD行为,结合能的理论值与实验结果的接近程度可与传统唯象方法相比拟.选用不同的参数有望得到更好的结果.In this paper, the light hypernuclei is assumed to have the structure of a nuclear core plus a lambda particle. The basic YN interactions are extracted from CQM. We give the nonlocal potentials of ΛN interactions in the frame of the Resonation Group Method. For applications, we study the binding energy B_Λ of hypernuclei by using the kohn-Hulthén-kato variational method. It is shown that the chiral SU(3) quark model properly describes the nonperturbative QCD behavior in the short and medium ranges of the interaction; the value basically agrees with the experiments and data obtained with phenomenological methods; proper parameters lead to a better result.

关 键 词：轻超核氦 结合能 手征SU(3)夸克模型 共振群方法 非定域位 

分 类 号：O571.22[理学—粒子物理与原子核物理]