论文标题
关于VBF单人和双Higgs生产中不可分离校正的影响
On the impact of non-factorisable corrections in VBF single and double Higgs production
论文作者
论文摘要
我们研究了可分解的和不可分割的QCD校正对矢量 - 玻璃融合单和双HIGGS生产的校正，并在$ \ MATHCAL {O}（O}（α_S^2）$上显示了这两个过程的合并校正。我们研究了有和没有选择的二依据近似值的有效性，并对与可分解的近距离校正进行了深入研究。在单个HIGGS生产的情况下，应用了选择削减后，发现非分量校正主要包含在可分解的尺度不确定性频段中。相反，当不应用剪切时，不可分割的校正略微超出了刻度不确定性频段。有趣的是，对于双Higgs生产，我们发现在剪切之前和之后，与单个HIGGS案例相比，不可分离的校正都得到了增强。我们将这种增强性追溯到各种领先的Feynman图之间存在精致的取消，这部分被辐射校正所破坏。所有研究的贡献均已在ProvbFH V1.2.0和ProvbFHH v1.1.0中实施。
We study the factorisable and non-factorisable QCD corrections to Vector-Boson Fusion single and double Higgs production and show the combined corrections for both processes at $\mathcal{O}(α_s^2)$. We investigate the validity of the eikonal approximation with and without selection cuts, and carry out an in-depth study of the relative size of the non-factorisable next-to-next-to-leading order corrections compared to the factorisable ones. In the case of single Higgs production, after selection cuts are applied, the non-factorisable corrections are found to be mostly contained within the factorisable scale uncertainty bands. When no cuts are applied, instead, the non-factorisable corrections are slightly outside the scale uncertainty band. Interestingly, for double Higgs production, we find that both before and after applying cuts, non-factorisable corrections are enhanced compared to the single Higgs case. We trace this enhancement to the existence of delicate cancellations between the various leading-order Feynman diagrams, which are partly spoiled by radiative corrections. All the studied contributions have been implemented in proVBFH v1.2.0 and proVBFHH v1.1.0.
