论文标题
搜索通过proton-proton碰撞在$ \ sqrt {s} = $ 13 TEV中，通过向量玻色融合产生的Higgs玻色子腐烂
Search for invisible decays of the Higgs boson produced via vector boson fusion in proton-proton collisions at $\sqrt{s} =$ 13 TeV
论文作者
论文摘要
搜索通过向量玻色子融合（VBF）产生的希格斯玻色子的无形衰变，已在LHC以$ \ sqrt {s} = $ 13 tev = $ 13 TEV的情况下进行的proton-proton碰撞的101 fb $^{ - 1} $进行了proton-proton碰撞，并通过2017年和2017年的构造机构收集了两种构建机构。分析类别，一种基于缺失的横向动量，第二个基于喷气机的属性。除了具有Z和W Boson候选事件的控制区域外，基于与Jets相关的光子的产生的高度人群的控制区域还用于限制与Jets联合产生的Z Boson的隐形衰减的主要不可减至的背景。根据2012年收集的数据（$ \ sqrt {s} = $ 8 TEV），2015年和2016年，该搜索的结果与VBF拓扑中的所有先前测量结果结合在一起，分别对应于19.7、2.3和36.3 fb $^{ - 1} $的集成亮度。假设标准模型生产横截面，发现Higgs玻色子的无形分支分数的（预期）上限为95％的置信度为0.18（0.10）。结果也可以在HIGGS-Portal模型的背景下进行解释。
A search for invisible decays of the Higgs boson produced via vector boson fusion (VBF) has been performed with 101 fb$^{-1}$ of proton-proton collisions delivered by the LHC at $\sqrt{s} =$ 13 TeV and collected by the CMS detector in 2017 and 2018. The sensitivity to the VBF production mechanism is enhanced by constructing two analysis categories, one based on missing transverse momentum, and a second based on the properties of jets. In addition to control regions with Z and W boson candidate events, a highly populated control region, based on the production of a photon in association with jets, is used to constrain the dominant irreducible background from the invisible decay of a Z boson produced in association with jets. The results of this search are combined with all previous measurements in the VBF topology, based on data collected in 2012 (at $\sqrt{s} =$ 8 TeV), 2015, and 2016, corresponding to integrated luminosities of 19.7, 2.3, and 36.3 fb$^{-1}$, respectively. The observed (expected) upper limit on the invisible branching fraction of the Higgs boson is found to be 0.18 (0.10) at the 95% confidence level, assuming the standard model production cross section. The results are also interpreted in the context of Higgs-portal models.
