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arXiv 1412.4641hep-ex
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在$\sqrt{s} = 8 $ TeV上寻找pp碰撞中轻子+喷注通道中四个顶夸克的标准模型产生

Search for standard model production of four top quarks in the lepton + jets channel in pp collisions at $\sqrt{s} = 8 $ TeV

James Keaveney

摘要:

在轻子+喷注通道中,对pp碰撞中四个顶夸克($t\bar{t}t\bar{t}$)的标准模型产生进行了研究.这些数据对应于19.6 fb $^{-1}$的积分亮度,记录在8 TeV的质心能量与CMS检测器在欧洲核子研究中心的LHC。运动学重建和多元技术相结合,用于区分小信号和大背景。实验结果与SM的预期一致,在95%的置信水平下,SM中产生4个顶夸克的截面上限为32 fb,而SM中产生4个顶夸克的截面上限为$32\pm{17}$ fb.

英文摘要:

A search is presented for standard model (SM) production of four top quarks ($t\bar{t}t\bar{t}$) in pp collisions in the lepton + jets channel. The data correspond to an integrated luminosity of 19.6 fb$^{-1}$ recorded at a centre-of-mass energy of 8 TeV with the CMS detector at the CERN LHC. A combination of kinematic reconstruction and multivariate techniques is used to distinguish between the small signal and large background. The data are consistent with expectations of the SM, and an upper limit of 32 fb is set at a 95\% confidence level on the cross section for producing four top quarks in the SM, where a limit of $32\pm{17}$ fb is expected.

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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