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arXiv 1202.1408hep-ex
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使用sqrt(s)= 7 TeV处高达4.9 fb-1 pp碰撞数据与LHC处的ATLAS探测器联合搜索标准模型希格斯玻色子

Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at sqrt(s) = 7 TeV with the ATLAS detector at the LHC

ATLAS Collaboration

摘要:

本文介绍了利用在sqrt(s)= 7 TeV下收集的pp碰撞的积分亮度从1.04 fb-1到4.9 fb-1的数据集,结合ATLAS实验对标准模型希格斯玻色子的联合搜索.希格斯玻色子的质量范围112.9-115.5 GeV、131-238 GeV和251-466 GeV在95%置信水平(CL)下被排除,而124-519 GeV的范围预计在没有信号的情况下被排除。在mH ~ 126 GeV附近观察到过量的事件,局部显著性为3.5个标准差(sigma)。H -> gamma gamma、H -> ZZ(*)-> 111“1”和H -> WW(*)-> 111“v(在该质量范围内的三个最敏感的通道)的局部显著性分别为2.8 σ、2.1 σ和1.4 σ。在探测到的希格斯玻色子质量范围110-600 GeV的任何地方,背景产生这种波动的总体概率估计为~1.4%,相当于2.2 sigma。

英文摘要:

A combined search for the Standard Model Higgs boson with the ATLAS experiment at the LHC using datasets corresponding to integrated luminosities from 1.04 fb-1 to 4.9 fb-1 of pp collisions collected at sqrt(s) = 7 TeV is presented. The Higgs boson mass ranges 112.9-115.5 GeV, 131-238 GeV and 251-466 GeV are excluded at the 95% confidence level (CL), while the range 124-519 GeV is expected to be excluded in the absence of a signal. An excess of events is observed around mH ~ 126 GeV with a local significance of 3.5 standard deviations (sigma). The local significance of H -> gamma gamma, H -> ZZ(*) -> lll'l' and H -> WW(*) -> lvl'v, the three most sensitive channels in this mass range, are 2.8 sigma, 2.1 sigma and 1.4 sigma, respectively. The global probability for the background to produce such a fluctuation anywhere in the explored Higgs boson mass range 110-600 GeV is estimated to be ~1.4% or, equivalently 2.2 sigma.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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