两重子间夸克交换效应与两重子体系结合能的分析  

Quark Exchange Effect in Two Baryon Systems

作　　者：余友文[1] 张宗烨[1] 

机构地区：[1]中国科学院高能物理研究所,北京100039

出　　处：《高能物理与核物理》2002年第z1期54-62,共9页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金资助

摘　　要：通过对两重子集团间夸克交换项的分析指出,两重子系统的夸克效应是两集团靠得很近时,并在相对运动的低次波中才能充分表现出来.对一给定的双重子态其夸克效应的性质由自旋、味道和色空间置换算符在该态的矩阵元决定.双重子态的结合能和两重子散射相移的数据是检验两集团间夸克效应的重要场所.The quark exchange effect in the two baryon systems is studied. The results show that the quark effect becomes obvious only when the two baryon clusters are closed together, and it also depends the spin-flavor quantum number of the system. The expectation value of the permutation operator of the spin-flavor-color space is a very important quantity to measure the quark exchange effect.some binding energies of the dibaryons are calculated, which are cardinal in examining the quark effect

关 键 词：双重子态 夸克模型 夸克效应 

分 类 号：O572.33[理学—粒子物理与原子核物理]