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arXiv 1101.5992hep-ex
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Tevatron中衰变到W + q的大质量t素夸克的计算

Searches for Massive tprime quarks decaying to W + q at the Tevatron

Alison Lister

摘要:

我们目前的搜索对生产的第四代tprime夸克在其衰变到Wq。我们分析4.6 fb-1和4.3 fb-1的CDF和D 0探测器,分别收集的数据,在费米实验室Tevatron对撞机在一个中心的质量能量sqrt s = 1.96 TeV。我们重建了重夸克的质量,并对观测到的(HT,Mreco)分布进行了二维拟合,以区分新的物理信号与标准模型背景。由于没有观察到明显的过量事件,我们排除了CDF(D 0)95%CL下质量低于335(296)GeV的第四代t质夸克。

英文摘要:

We present searches for pair-production of fourth generation tprime quarks in their decays to Wq. We analyse 4.6 fb-1 and 4.3 fb-1 of data collected by the CDF and D0 detectors, respectively, at the Fermilab Tevatron collider at a centre-of-mass energy of sqrt s = 1.96 TeV. We reconstruct the mass of the heavy quark and perform a two-dimensional-fit to the observed (HT, Mreco) distributions to discriminate the new physics signal from standard model backgrounds. As no significant excess of events is observed, we exclude a fourth-generation tprime quark with a mass below 335 (296) GeV at 95%CL at CDF (D0).

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