利用手征SU(3)夸克模型研究轻超核_Λ~5He,_Λ~4He和_Λ~4H的结合能  

Study about the Binding Energy of Light Hypernuclei _Λ~5He,_Λ~4He and _Λ~4 H Based on Chiral SU(3) Quark Model

作　　者：陆晓[1] 白莹 杨永栩[1] 沈彭年[2] 

机构地区：[1]广西师范大学物理与信息工程学院,桂林541004 [2]中国科学院高能物理研究所,北京100049

出　　处：《高能物理与核物理》2005年第7期668-672,共5页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10147202;10475089;10435080);中国科学院知识创新重大项目(KJCX2SWN02);广西自然科学基金(0339035)资助~~

摘　　要：利用手征SU(3)夸克集团模型,通过共振群方法(RGM)得到非定域的YN相互作用势和Λ超子与壳心核的相互作用势,并用其计算了轻Λ超核5ΛHe,4ΛHe和4ΛH的结合能.计算结果表明,手征SU(3)夸克集团模型不仅能较好地描述Λp散射,也能较好地描述轻Λ超核的结合能.由于利用共振群方法(RGM)直接抽取的非定域YN相互作用势更为准确,因此计算得到的轻Λ超核5ΛHe,4ΛHe和4ΛH的结合能更符合实验数据,同时,这也为将来研究超核和多夸克体系确定了一套更为精确的模型参数.In the framework of the resonating group method, the non-local YN interaction and Λ-core interaction in the chiral SU(3) quark model are obtained, and the binding energies BΛ of light hypernuclei 5ΛHe, 4ΛHeand 4ΛH are calculated. It is shown that the chiral SU(3) quark model can well-describe not only the ΛN scattering but also the binding energies of light hypernuclei. The resultant binding energies B_Λ of light hypernuclei by using the non-local YN interaction in terms of the resonating group method are more accurate than those by using the generator coordinate method. As a result, a set of model parameters is more accurately determined for the future hypernucleus and multi-quark system studies.

关 键 词：手征SU(3)夸克模型 结合能 He 超核 相互作用势 共振群方法 集团模型 计算结果 实验数据 模型参数 非定域 

分 类 号：O571[理学—粒子物理与原子核物理]