发表机构
CERN; Massachusetts Institute of Technology; Vinca Institute of Nuclear Sciences; Adelaide University（欧洲核子研究组织; 麻省理工学院; 温卡核科学研究所; 阿德莱德大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文在FCC-ee上通过全强子六喷注末态同时测量H->WW和H->ZZ信号强度，采用喷注聚类与配对技术，在240 GeV和10.8 ab^-1下获得1.48%和8.20%的相对不确定度。
AI 中文摘要
精确测定希格斯玻色子与电弱规范玻色子的耦合是FCC-ee物理计划的一个关键目标。特别是，希格斯玻色子与W和Z玻色子耦合的测量在模型无关地确定其总衰变宽度中起着核心作用。本文介绍了在Higgsstrahlung产生过程中对希格斯玻色子衰变H -> WW和H -> ZZ的研究。该分析聚焦于伴随产生的Z玻色子以及来自希格斯衰变的矢量玻色子全部发生强子衰变的事件，从而产生六喷注末态。较大的H -> WW分支比使得全强子道具有高信号统计量，而对于H -> ZZ，其小得多的希格斯分支比部分地被Z玻色子的大强子分支比所补偿。由于WW和ZZ衰变模式之间存在显著的动力学重叠，它们的信号强度被同时提取。采用喷注聚类和专用喷注配对技术来优化强子衰变规范玻色子的重建，并增强两个信号分量的分离。假设质心能量为240 GeV，积分亮度为10.8 ab^-1，对于H -> WW和H -> ZZ衰变模式，预期在产生截面乘以分支比sigma(ZH) x BR上的相对不确定度分别为1.48%和8.20%。
英文摘要
The precise determination of the Higgs boson couplings to electroweak gauge bosons is a key objective of the FCC-ee physics program. In particular, measurements of the Higgs boson couplings to W and Z bosons play a central role in the model-independent determination of its total decay width. This paper presents a study of Higgs boson decays to H -> WW and H -> ZZ in the Higgsstrahlung production process. The analysis focuses on events in which the associated Z boson and the vector bosons from the Higgs decay all decay hadronically, resulting in six-jet final states. The large H -> WW branching fraction leads to high signal statistics in the fully hadronic channel, while for H -> ZZ the much smaller Higgs branching fraction is partly compensated by the large hadronic branching fractions of the Z bosons. Due to the substantial kinematic overlap between the WW and ZZ decay modes, their signal strengths are extracted simultaneously. Jet-clustering and dedicated jet-pairing techniques are employed to optimize the reconstruction of the hadronically decaying gauge bosons and enhance the separation of the two signal components. Assuming a center-of-mass energy of 240 GeV and an integrated luminosity of 10.8 ab^-1, expected relative uncertainties of 1.48% and 8.20% are obtained on the production cross section times branching fraction, sigma(ZH) x BR, for the H -> WW and H -> ZZ decay modes, respectively.
