摘要
文中研究了 L_3探测器在1990年3月至8月间采集的 Z^0能区 e^+e^-→τ^+τ^-(γ)事例,计算各能量点对应的反应截面和前后电荷不对称性,并由此拟合得到 Z°的弱电参数М_z、Г_z、Г_τ以及和 sin^2w.结果与标准模型的预言相符合.
Using the data on Z^0 resonance which werc acquired by the L3 group between March and August in 1990,we have measured the cross sections and forward-backward charge asymmetries of e^+e^-→τ^+τ^-(γ).Then some Z^0 paramet- ers such as M_z,Γ_z,Γ_τ and ,,sin^2w are determined by fitting these measurements.
出处
《中国科学院研究生院学报》
CAS
CSCD
1992年第2期181-190,共10页
Journal of the Graduate School of the Chinese Academy of Sciences
关键词
反应截面
衰变宽度
电子
Ζ°参数
cross section
forward-backward charge asymmetry
decay width
the neutral current coupling constant
fit
