L3实验单W产生截面及反常耦合常数的测量  

Measurement of the Cross-Section of Single W Boson Production and the Anomalous Couplings on L3 Experiment

作　　者：杨民[1] 陈国明[1] 杨海军[1] 熊兆华[1] 吕雨生[1] 陈和生[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》2000年第12期1073-1080,共8页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金资助!(19675047;19555003)

摘　　要：使用１９９６和１９９７年在Ｌ３探测器上获得的数据，对单Ｗ粒子产生过程ｅ＋ｅ－→ｅ──νｅＷ＋和 ｅ＋ｅ－→ｅ＋νｅＷ－的反应截面做出了测量，并根据测量结果给出ＷＷγ三玻色子耦合的反常耦合常数为：－ ０．６５＜△κγ，＜ ０．８２，－ １．３７＜λγ＜ ０． ９２．实验结果在误差范围内是与标准模型的理论值一致的，没有发现反常耦合常数存在的迹象．In this paper, the cross-sections of single W boson production e+ e-→e--νeW+ and e+ e-→e+νeW- were measured based on the data samples collected by the L3 detector in 1996 and 1997. The limits on the anomalous couplings Of WWγ triple gauge boson are derived at 95 % CL: - 0. 65<△κγ < 0. 82 and - 1. 37<λγ < 0. 92. The results are consistent with the Standard Model predictions and no anomalous couplings are found.

关 键 词：单W粒子产生截面 玻色子 耦合常数 标准模糊 

分 类 号：O572[理学—粒子物理与原子核物理]