用强子化的夸克组合模型事例产生器研究e^+e^-→h′s过程  

Studying e^+e^-→h＇s Process by Event Generator of Quark Combination Model

作　　者：司宗国[1] 谢去病[2] 

机构地区：[1]华中师范大学粒子物理研究所,湖北武汉430070 [2]山东大学物理系,山东济南250100

出　　处：《高能物理与核物理》1999年第5期445-458,共14页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金

摘　　要：用强子化的夸克组合模型研究了e+e-→h′s反应，发现它可以用比LUND弦碎裂模型少得多的可调参数拟合实验事实，并对一些现象给出更直观的理解．对模型预言与实验的某些偏离，也作了分析．The event generator of quark combination model is obtained by replacingLUND string fragmentation model in JETSET7.3. Then this generator is applied tostudy the e^+e^-→h's process. Using much less adjustable parameters than other models.It is found that quark combination model can reproduce a lot of data, such as theaverage hadron mulhplicities, the difference &_(bl) betWeen b-quark and light-quark events,the baryon to meson ratios, the event shape distributions and the baryon antibaryoncorrelations, etc. The reason for some of its predictions deviated from data isdiscussed. Moreover, it is found that quark combination model can give more directunderstanding for some phenomena, eg., the baryon to meson ratios and the baryonanhbaryon correlations, etc.

关 键 词：强子化 夸克组合模型 事例产生器 e^+e^-反应 

分 类 号：O572.2[理学—粒子物理与原子核物理]