摘要
量子电动力学（ＱＥＤ）的实验检验一直是ｅ＋ｅ－对撞机上的重要物理工作之一．在Ｚ０共振峰附近（８８～９４ＧｅＶ），ｅ＋ｅ→γγ是最干净的ＱＥＤ过程．ＬＥＰ四个实验组通过这一过程分别对ＱＥＤ进行了实验检验，证明在迄今人们所能达到的ｅ＋ｅ－对撞最高质心系能量下，ＱＥＤ仍然很好地描述ｅ＋ｅ－→γγ过程，即在２×１０－１６ｃｍ线度内，ＱＥＤ仍然成立．我们参加了Ｌ３国际合作组的工作，在国内分析了１９９０年、１９９１年Ｌ３的物理数据，本文报告我们的分析方法和结果．
Experimental testing of quantum electrodynamics(QED) has always been important work on e+e- colliders. At Z0 pole (88～94GeV) e+e→γγ process is the cleanest QED process, through which four LEP experiment teams performed their tests on QED. It is proved that at the highest centre of mass energy ever reached so far via e+e- collision, QED still well discribes the process e+e→γγ,i. e., QED holds down to a dimension of 2 ×10-16cm.
基金
国家自然科学基金
