手征SU(3)夸克模型的Σ-N相互作用及~4_ΣHe结合能的计算  

Σ-N Interactions and Binging Energy of Hypernucleus ~4_ΣHe Based on Chiral SU(3) Quark Modal

作　　者：曹会英[1] 

机构地区：[1]西北第二民族学院基础部,宁夏银川750021

出　　处：《山西大学学报（自然科学版）》2007年第3期348-352,共5页Journal of Shanxi University(Natural Science Edition)

基　　金：西北第二民族学院自然类基金(2006Y045)

摘　　要：利用SU(3)夸克模型,采用共振群方法得到非定域Σ-N相互作用势以及Σ超子与3He壳心核的相互作用势,并用于4ΣHe基态结合能的计算.计算结果表明SU(3)夸克模型不仅能较好地描述Σ-P散射,而且由其计算的Σ4He结合能也与实验值吻合得很好.同时,研究结果也表明在同位旋T=1/2的条件下,只有自旋S=1对Σ4He结合能有贡献,S=0则没有.Using the resonating group method,the non-local ∑-N interactions and ∑-core interactions based on the chiral SU（3） quark model are obtained,and the bound energy B∑ of hypernuclei ^4∑He is calculated. The result is shown that chiral the SU（3） quark model can be well-described the ∑-P scattering,and in the non-local ∑-N interactions the resultant bound energy B∑ of ^4∑He are agreeing with the experiment date well. In addition,the result indicates that total spin S= 1 can offer contribution to the bound energy but total spin S=0 can not for the total isospin T= 1/2 in the two-body ∑-N interactions.

关 键 词：超核 SU(3)手征夸克模型 共振群 非定域势 结合能 

分 类 号：O571[理学—粒子物理与原子核物理]