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arXiv 1610.08066hep-ex
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寻找衰变为矢量玻色子和希格斯玻色子玻色子的重共振,它们处于带电轻子、中微子和b夸克的终态

Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks

CMS Collaboration

摘要:

寻找衰变为希格斯玻色子和矢量玻色子的重共振。该分析是使用2015年在LHC的CMS实验中收集的数据样本进行的,该实验在13 TeV的质心能量下进行质子-质子碰撞,对应于2.2-2.5毫微微电子能的积分亮度。搜索是在矢量玻色子衰变到轻子末态(Z到nu nu,W到l nu,Z到l l,l = e,mu)的通道中进行的,而希格斯玻色子玻色子衰变到准直的b夸克对,被检测为单个大质量喷流。利用喷流质量要求的鉴别能力和喷流标记算法来抑制标准模型背景。数据中观察到的事件产额与背景预期一致。在一个重矢量三重态的理论模型中,在95%的置信水平下排除了质量小于2 TeV的共振。结果也解释的模型参数的限制,提高了以前的搜索范围。

英文摘要:

A search for heavy resonances decaying to a Higgs boson and a vector boson is presented. The analysis is performed using data samples collected in 2015 by the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to integrated luminosities of 2.2-2.5 inverse femtobarns. The search is performed in channels in which the vector boson decays into leptonic final states (Z to nu nu, W to l nu, and Z to l l, with l = e, mu), while the Higgs boson decays to collimated b quark pairs detected as a single massive jet. The discriminating power of a jet mass requirement and a b jet tagging algorithm are exploited to suppress the standard model backgrounds. The event yields observed in data are consistent with the background expectation. In the context of a theoretical model with a heavy vector triplet, a resonance with mass less than 2 TeV is excluded at 95% confidence level. The results are also interpreted in terms of limits on the parameters of the model, improving on the reach of previous searches.

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