Higher-order QED corrections to single-W production in electron–positron collisions
Higher-order QED corrections to single-W production in electron–positron collisions
复制标题
对电子-正电子碰撞中单 W 产生的高阶 QED 校正
DOI：
10.1007/s100520100673
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
F. Piccinini
中科院分区：
文献类型：
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作者：
G. Montagna;M. Moretti;O. Nicrosini;A. Pallavicini;F. Piccinini
为了验证电弱理论的精确性，在LEP上研究了在束管中有一个粒子丢失的四费米子过程。在结构函数（SF）方法的框架内分析了这些过程的高阶QED校正。进入QED SF的能量标度是通过检查对四费米子末态的辐射修正的软和共线极限来确定的，特别注意单W产生的过程。数值预测显示在现实的情况下LEP实验，并与现有的结果相比。本文介绍了一个蒙特卡罗事件发生器，它包括精确的三能级矩阵元、真空极化、高阶超前QED修正和反常三线性规范耦合。
Four-fermion processes with a particle lost in the beam pipe are studied at LEP to perform precision tests of the electroweak theory. Leading higher-order QED corrections to such processes are analyzed within the framework of the structure function (SF) approach. The energy scale entering the QED SF is determined by inspection of the soft and collinear limit of theradiative corrections to the four-fermion final states, paying particular attention to the process of single-Wproduction. Numerical predictions are shown in realistic situations for LEP experiments and compared with existing results. A Monte Carlo event generator, including exact tree-level matrix elements, vacuum polarization, higher-order leading QED corrections and anomalous trilinear gauge couplings, is presented.