Loop-induced $ZZ$ production can be enhanced by the large gluon flux at the LHC, and thus should be taken into account in relevant experimental analyses. We present for the first time the results of a fully exclusive simulation based on the matrix elements for loop-induced $ZZ + 0,1,2$-parton processes, merged and matched to parton showers. The new description is studied and validated by comparing it with well-established simulation with jets from parton showers. We find that the matched simulation provides a state-of-the-art description of the final state jets. We also briefly discuss the physics impact on vector boson scattering (VBS) measurements at the LHC, where event yields are found to be smaller by about 40\% in a VBS $ZZjj$ baseline search region, compared to previous simulation. We hence advocate relevant analyses to employ a more accurate jet description for the modeling of the loop-induced process.

中文翻译：

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LHC 的回路诱导 ZZ 产生：矩阵元素匹配的改进描述

LHC 处的大胶子通量可以增强环诱导的 $ZZ$ 产生，因此应在相关实验分析中加以考虑。我们首次展示了基于循环诱导的 $ZZ + 0,1,2$-parton 过程的矩阵元素的完全独占模拟的结果，合并并匹配到 parton 喷淋。新的描述是通过将其与来自部分阵雨的射流的成熟模拟进行比较来研究和验证的。我们发现匹配的模拟提供了对最终状态射流的最新描述。我们还简要讨论了 LHC 对矢量玻色子散射 (VBS) 测量的物理影响，与之前的模拟相比，在 VBS $ZZjj$ 基线搜索区域中发现事件产率小了约 40%。