摘要
对Ｚ０能区９１．２ＧｅＶ正负电子湮没产生强子末态的事例，分别针对全喷注和双喷注在不同快度窗口的单、双半球空间内进行多重数分布的泊松拟合．根据〈ｎ〉／Ｄ参量及拟合度得到近泊松形式，与有关理论模型进行了比较，并讨论了与ＫＮＯ无标度性的关系．分析了偏离泊松形式的有关参数与非独立粒子发射及关联强度之间的联系．利用ＪＡＤＥ喷注分析法讨论了中心快度区的“肩状结构”
The charged multiplicity distributions of hadron final states in the e+e-annihilation at the 91.2 GeV Z0 energy region are fitted with Poisson shape in different rapidity windows for double and single hemisphere. The multiplicities which are in Poisson-like shapes can be got according to the parameter <n>/D and fitting qualities are compared with the results derived from the relevant theoretical models.The relationship between the Poisson-like shape and KNO scaling is discussed. The connection between the parameters expressing the deviation from the Poisson shape and non-independent particle emission and multiplicity correlation strength is analyzed. The 'shoulder structure' is observed in the central rapidity region and analyzed with multi-jets by using the JADE jet analysis algorithm.
出处
《高能物理与核物理》
CSCD
北大核心
1994年第9期778-787,共10页
High Energy Physics and Nuclear Physics
关键词
强子多重数
泊松分布
正负电子对撞
Z￣0, e￣+e￣- annihilation, multiplicity of hadrons, Poisson distribution,shoulder structure.
