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arXiv 1704.03366hep-ex
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在sqrt(s)= 13 TeV质子-质子碰撞中寻找高增强轻子+喷注和完全强子末态的t t-棒共振

Search for t t-bar resonances in highly boosted lepton+jets and fully hadronic final states in proton-proton collisions at sqrt(s) = 13 TeV

CMS Collaboration

摘要:

研究了衰变为顶夸克-反夸克对的重共振态的产生。分析是在轻子+喷流和完全强子通道使用收集的数据在质子-质子碰撞在sqrt(s)= 13 TeV的使用CMS探测器在大型强子对撞机,对应于一个积分亮度的2.6个反femtobarns。这种选择是针对大质量共振而优化的,在这种共振中,顶夸克有很大的洛伦兹提升。在数据中没有发现共振t形棒生产的证据,并设定了重共振生产截面的上限。与之前的分析相比,在sqrt(s)= 8 TeV时,质量高于2 TeV的共振的排除极限得到了显着改善。

英文摘要:

A search for the production of heavy resonances decaying into top quark-antiquark pairs is presented. The analysis is performed in the lepton+jets and fully hadronic channels using data collected in proton-proton collisions at sqrt(s) = 13 TeV using the CMS detector at the LHC, corresponding to an integrated luminosity of 2.6 inverse femtobarns. The selection is optimized for massive resonances, where the top quarks have large Lorentz boosts. No evidence for resonant t t-bar production is found in the data, and upper limits on the production cross section of heavy resonances are set. The exclusion limits for resonances with masses above 2 TeV are significantly improved compared to those of previous analyses at sqrt(s) = 8 TeV.

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