重子谱中的自旋-轨道耦合力  

Spin-Orbit Force in Baryon Spectrum

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》2004年第6期594-600,共7页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 90 10 3 0 2 0 ;10 0 470 0 2 )资助~~

摘　　要：在组份夸克势模型的框架下 ,用几种夸克势模型对重子谱中N和Λ的几组L =1负宇称激发态自旋轨道劈裂进行了分析 。In the framework of the constituent quark model, the spin-orbit splitting of the lowest L=1 excited states of N and Λ are analyzed by using various quark potential models. The results show that only when a two gluon exchange phenomenological flavor dependent l·s term is considered in the potential, the spin-orbit splitting of N and two sets of Λ L=1 states can be explained simultaneously.

关 键 词：高能物理学 重子谱 自旋轨道相互作用 夸克势模型 能级劈裂 

分 类 号：O572.3[理学—粒子物理与原子核物理]