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arXiv 1109.5945hep-ex
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用ATLAS探测器在衰变通道H-> ZZ(*)->4l中寻找标准模型希格斯玻色子

Search for the Standard Model Higgs boson in the decay channel H->ZZ(*)->4l with the ATLAS detector

ATLAS Collaboration

摘要:

在衰变通道H->ZZ(*)->l+l-l+l-中寻找标准模型希格斯玻色子,其中l=e,μ.质子-质子碰撞数据在sqrt(s)=7 TeV的ATLAS探测器记录和相应的平均积分亮度为2.1 fb-1相比,标准模型的预期。导出了质量在110 ~ 600 GeV之间的标准模型希格斯玻色子产生截面的上限。对于质量为194 GeV的希格斯玻色子,其产生截面的观测(预期)95%置信水平上限是标准模型预测的0.99(1.01)倍,该区域具有最佳的预期灵敏度。标准模型中的希格斯玻色子在95%的置信水平下被排除在191-197、199-200和214-224 GeV的质量范围之外。

英文摘要:

A search for the Standard Model Higgs boson in the decay channel H->ZZ(*)->l+l-l+l-, where l=e,mu, is presented. Proton-proton collision data at sqrt(s)=7 TeV recorded with the ATLAS detector and corresponding to an average integrated luminosity of 2.1 fb-1 are compared to the Standard Model expectations. Upper limits on the production cross section of a Standard Model Higgs boson with a mass between 110 and 600 GeV are derived. The observed (expected) 95% confidence level upper limit on the production cross section for a Higgs boson with a mass of 194 GeV, the region with the best expected sensitivity for this search, is 0.99 (1.01) times the Standard Model prediction. The Standard Model Higgs boson is excluded at 95% confidence level in the mass ranges 191-197, 199-200 and 214-224 GeV.

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