论文标题
在NLO QCD校正中，gluon引发的ZH生产
On the NLO QCD Corrections to Gluon-Initiated ZH Production
论文作者
论文摘要
我们以$ gg \ rightarrow zh $的近临界顺序计算QCD校正，包括虚拟的两环条款和房地产贡献。虚拟校正中的两环框图在整个相空间上进行了分析，结合了小型横向动量极限的扩展结果和高能量状态的扩展。我们获得横截面的包容性和差异结果。我们发现，NLO QCD校正的大小与$ ZH $不变的质量的大小接近1 TEV，但是当考虑到较高的能量时，由于一类真实发射图，它们在考虑到$ z $ boson的一类中，其中它们从开放的夸克线中辐射出来。最后，我们估计由于整个和差分横截面上的顶级质量质量的重新规范化方案而引起的不确定性。
We compute the QCD corrections at next-to-leading order for the process $gg \rightarrow ZH$, including both the virtual two-loop terms and real-emission contributions. The two-loop box diagrams in the virtual corrections are approximated analytically over the complete phase space, combining the results of an expansion in the limit of small transverse momentum and an expansion in the regime of high energy. We obtain both inclusive and differential results for the cross section. We find that the NLO QCD corrections are of the same size as the LO contribution up to $ZH$ invariant masses close to 1 TeV, but they increase significantly when higher energies are considered, due to a class of real-emission diagrams in which the $Z$ boson is radiated from an open quark line. Finally, we estimate the uncertainty due to the renormalization scheme used for the top-quark mass both on the total and differential cross section.
