Combination of Searches for Invisible Higgs Boson Decays with the ATLAS Experiment
Combination of Searches for Invisible Higgs Boson Decays with the ATLAS Experiment
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DOI：
10.1103/physrevlett.122.231801
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发表时间：
2019-06-13
影响因子：
8.6
通讯作者：
Zhang, Z.
中科院分区：
文献类型：
--
作者：
Aaboud, M.;Aad, G.;Zhang, Z.
暗物质粒子，如果足够轻，可能会在希格斯玻色子的衰变中产生。这封信提出了一个统计组合的搜索H ->不可见的衰变，其中H是根据标准模型通过矢量玻色子融合，Z（II）H和W/Z（Had）H产生的，所有这些都是在LHC上使用36.1 fb（-1）的pp碰撞在质心能量为根s = 13 TeV的ATLAS探测器进行的。结合在根s = 7和8 TeV处的结果，在95%置信水平下观察到H ->不可见分支比的排除极限为0.26（0.17（-0.05）（+0.07））（预期）。
Dark matter particles, if sufficiently light, may be produced in decays of the Higgs boson. This Letter presents a statistical combination of searches for H -> invisible decays where H is produced according to the standard model via vector boson fusion, Z(ll)H, and W/Z(had)H, all performed with the ATLAS detector using 36.1 fb(-1) of pp collisions at a center-of-mass energy of root s = 13 TeV at the LHC. In combination with the results at root s = 7 and 8 TeV, an exclusion limit on the H -> invisible branching ratio of 0.26(0.17(-0.05)(+0.07)) at 95% confidence level is observed (expected).