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arXiv 1104.4522hep-ex
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在sqrt{s}=1.96 TeV的ppbar碰撞中寻找第四代t'夸克

Search for a fourth generation t' quark in ppbar collisions at sqrt{s}=1.96 TeV

D0 Collaboration, V. Abazov

摘要:

利用D 0合作组在费米实验室Tevatron对撞机上收集的能量为1.96 TeV的质子-反质子碰撞的积分亮度为5.3/fb的数据,研究了第四代t'夸克及其反粒子的对产生,以及它们衰变为W玻色子和喷流的过程.我们对t形棒的生产截面设定了上限,排除了95% C. L。一种t'夸克,只衰变为质量低于285 GeV的W+喷流。我们观察到一个小的多余的μ子+射流通道,减少了排除的质量范围相比,预期的限制320 GeV的信号的情况下。

英文摘要:

We present a search for pair production of a fourth generation t' quark and its antiparticle, followed by their decays to a W boson and a jet, based on an integrated luminosity of 5.3/fb of proton-antiproton collisions at sqrt{s}=1.96 TeV collected by the D0 Collaboration at the Fermilab Tevatron Collider. We set upper limits on the t't'bar production cross section that exclude at the 95% C.L. a t' quark that decays exclusively to W+jet with a mass below 285 GeV. We observe a small excess in the muon+jets channel which reduces the mass range excluded compared to the expected limit of 320 GeV in the absence of a signal.

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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