高能强子化过程的自旋转移和轻子诱发反应中超子的极化  

Spin Transfer in High-Energy Hadronization Processes and Polarization of Hyperon in the Lepton-Induced Reactions

作　　者：刘春秀[1] 梁作堂[1] 

机构地区：[1]山东大学物理系,济南250100

出　　处：《高能物理与核物理》2001年第6期476-486,共11页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ;教育部优秀青年教师基金 ;霍英东青年教师基金资助&&

摘　　要：指出在轻子诱发反应中测量产生超子的极化是研究高能强子化过程自旋转移的理想途径 .在总结这些反应产生的初始夸克或反夸克极化的基础上 ,给出了超子极化的计算方法 .作为应用举例 ,给出了e+e- 湮没过程中LEP能量下各种超子的极化及与已有实验的比较 .这些结果表明 ,测量各类超子的极化可作为检验不同的重子自旋结构图像 。We show that measuring the polarization of hyperon in the lepton induced reactions is an ideal way to study the spin transfer in high energy hadronization processes. After a brief summary of the polarization of the initial quark or antiquark in these reactions,we give the calculation method of the polarization of hyperon. As an example,we calculate polarizations of different hyperons in e +e - annihilation at LEP energys and compare these results with the available data. The results show that measurements of such polarizations should provide important information about the question of which picture of spin structure of baryon is more suitable in describing the spin effects in the high energy fragmentation processes.

关 键 词：轻子诱发反应 自旋转移 重子自旋结构 超子极化 

分 类 号：O572[理学—粒子物理与原子核物理]