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arXiv 1409.7339hep-ex
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sqrt(s)= 8 TeV 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

CMS Collaboration

摘要:

在轻子+喷注通道中,对pp碰撞中四个顶夸克(t t-bar t-bar)的标准模型产生进行了研究.这些数据对应的积分亮度为19.6倒飞秒记录在一个中心的质量能量为8 TeV的CMS探测器在欧洲核子研究中心LHC。SM四顶夸克产生的预期截面约为1 fb。运动学重建和多元技术相结合,用于区分小信号和大背景。数据与SM的预期一致,并且在SM中产生四个顶夸克的截面上在95%置信水平上设定32 fb的上限,其中预期的极限为32 +/-17 fb。

英文摘要:

A search is presented for standard model (SM) production of four top quarks (t t-bar t t-bar) in pp collisions in the lepton + jets channel. The data correspond to an integrated luminosity of 19.6 inverse femtobarns recorded at a centre-of-mass energy of 8 TeV with the CMS detector at the CERN LHC. The expected cross section for SM four top quark production is approximately 1 fb. 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 +/- 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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