标题： 电弱修正对$H\to t\bar{t}$衰变率的影响 显示英文标题

标题： Electroweak corrections to the $H\to t\bar{t}$ decay rate

摘要： 电弱修正在单圈水平上计算了过程$H\rightarrow t{\bar t}$，特别是考虑到最近CDF宣布的新顶夸克质量值。 对于$M_H < 1. TeV$，当微扰计算有效时，随着希格斯粒子质量$M_H$在该区域内增加，衰变宽度本身会增加几到20个百分点，但它们的方向与QCD修正相反。 如果同时考虑电弱和QCD修正，该模式的最终衰变宽度将比树级结果减少几个百分点。 显示英文摘要

摘要： The electroweak corrections at one-loop level to the process $H\rightarrow t{\bar t}$ are calculated, especially the fresh top mass value announced recently by CDF is concerned. For $M_H < 1. TeV$ where a perturbative calculation is valid, the corrections themselves would gain a few to 20 percent increment in the decay width as the Higgs mass $M_H$ is increasing within the region, but they are in opposite direction to the QCD ones. If the electroweak and QCD corrections are concerned in the meantime, the resultant decay width of the mode yields a reduction about a few percent of the tree level one.