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arXiv 1509.04261hep-ex
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用ATLAS探测器在$\sqrt{s} = 8$ TeV上寻找PDMATHAAB碰撞中衰变成$W$玻色子和轻夸克的新重夸克对的产生

Search for pair production of a new heavy quark that decays into a $W$ boson and a light quark in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector

ATLAS Collaboration

摘要:

研究了一种新的重夸克($Q$)的成对产生,这种新的重夸克($Q$)衰变为$W$玻色子和轻夸克($q$),在最终状态下,一个$W$玻色子轻子衰变(衰变为电子或μ子加中微子),另一个$W$玻色子强子衰变.分析使用的积分光度为20.3 fb $^{-1}$的$pp$碰撞在$\sqrt{s} = 8$ TeV收集的ATLAS探测器在大型强子对撞机。未观察到产生$Q\bar{Q}$的证据。假设BR $(Q\to Wq)=1$,在95%的置信水平下排除质量低于690 GeV的新手征夸克。结果也解释的上下文中的矢量夸克模型,导致在BR $(Q\to Wq)$与BR $(Q\to Hq)$的二维平面上的矢量夸克的质量的限制。

英文摘要:

A search is presented for pair production of a new heavy quark ($Q$) that decays into a $W$ boson and a light quark ($q$) in the final state where one $W$ boson decays leptonically (to an electron or muon plus a neutrino) and the other $W$ boson decays hadronically. The analysis is performed using an integrated luminosity of 20.3 fb$^{-1}$ of $pp$ collisions at $\sqrt{s} = 8$ TeV collected by the ATLAS detector at the LHC. No evidence of $Q\bar{Q}$ production is observed. New chiral quarks with masses below 690 GeV are excluded at 95% confidence level, assuming BR$(Q\to Wq)=1$. Results are also interpreted in the context of vectorlike quark models, resulting in the limits on the mass of a vectorlike quark in the two-dimensional plane of BR$(Q\to Wq)$ versus BR$(Q\to Hq)$.

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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