Higher-order Effects in Electroweak Interactions

电弱相互作用中的高阶效应

基本信息

批准号：
60540184
负责人：
WAKAIZUMI Seiichi
金额：
$ 1.22万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

项目摘要

The subject of this project is to test SU (2)(]sy.crosprd.[)U(1) standard theory of the electroweak interactions, especially its field-theoretical aspect, by the investigation of the higher-order effects of the theory on various electroweak processes. Under this project, we have done a research into the radiative corrections in the one-loop level to the process e<@D1+@>D1e<@D1-@>D1 W<@D1+@>D1W<@D1-@>D1 and the rare decays of K and B mesons and Z<@D10@>D1-boson. We describe in the following main results of our investigation.1. In order to calculate the 1-loop corrected amplitude, we develop the general formula for the loop-integrals of the 1-loop vertex function and the box diagram, and we construct a program with which one can algebraically generate the amplitude in the "REDUCE", using the formula, on the basis of the most general amplitude formalism for the vertex function of three-gauge boson coupling and the box diagram. With these tools, we calculate the amplitudes in the Feynman gauge for 1-loop virtual correction for e^+e^- W W^-. Then, soft-photon emission amplitudes are obtained and a procedure of analytically esparating the infra-red divergences from both the vertex function and the box function is established.2. We study the effect of W-boson width on the total cross-section of e^+e^- W W^- and find its effect to be as much as 5%. this turns out to significantly affect the determination of the W-boson mass from measurement of the total cross-sections. Also, we anlyze the effect of the extra-Z boson inspired by the super-string theory on e^+e^- W W^- . The cross-sections show a remarkable feature and turn out to be detectable by experiments.

该项目的主题是通过研究该理论对各种electroweak过程的高阶效应，测试su（2）（] sy.crosprd。[）u（1）电子相互作用的标准理论，尤其是其现场理论方面。在这个项目下，我们对一个循环级别的辐射校正进行了研究。我们在调查的以下主要结果中描述1。为了计算1循环校正的振幅，我们开发了1环顶点函数和框图的循环集成仪的一般公式，并且我们构建了一个程序，该程序可以使用该程序在“降低”中以最大的一般形式形式为box and the box and the vertex功能和bos and the vertex功能而在“降低”中生成幅度。使用这些工具，我们计算Feynman仪表中的振幅，以进行1循环的虚拟校正，以进行E^+E^ - W w^ - 。然后，获得软晶发射幅度，并在分析中建立了从顶点函数和框函数的分析过程。2。我们研究W玻璃宽度对E^+E^ - W W^ - 总横截面的影响，并发现其作用高达5％。事实证明，从总横截面的测量中，明显影响了W玻璃体质量的测定。另外，我们受到超级弦理论启发的额外Z玻色子的影响，对E^+e^ - w w^ - 。横截面显示出一个显着的特征，并可以通过实验可检测到。