A study of the dynamical-fluctuation property inside jets in e^+e^-collisions

作     者：陈刚 张昆实 刘连寿 

作者机构：Institute of Particle PhysicsHuazhong Normal UniversityWuhan 430079China Jingzhou Teacher's CollegeJingzhou 434020China Institute of Particle PhysicsHuazhong Normal UniversityWuhan 430079China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2003年第46卷第3期

页      面：268-283页

核心收录：

学科分类：07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：the Nation Natural Seienee Foundation ofChina(Grant No.19975021) by theseienee Foundation of the Edueation DePartment of Hubei Provinee 

主　　题：high energy multi-production, dynamical fluctuation, gluon-jets, quark-jets, scale. 

摘      要：A study of the dynamical-fluctuation property of 2-jet events is carried out. It is found that the dynamical fluctuations of the hadronic system inside 2-jet events change with the variation of the cut parameter ycut. There is a transition point, where the dynamical fluctuations in these systems are circular in the transverse plane; and are elliptical in the longitudinal-transverse planes. It is shown that this transition point corresponds to the scale of visible jets. Meanwhile, the dynamical fluctuation properties inside a single-jet in 2-jet and 3-jet events are compared. The dynamical fluctuations inside quark- and gluon-jets are found to be qualitatively different. A scale for the visible gluon jet production is thus obtained.