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Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, Helsinki, Finland.
Phys Rev Lett. 2008 Jun 13;100(23):231801. doi: 10.1103/PhysRevLett.100.231801. Epub 2008 Jun 11.
We report on a search for narrow-width particles decaying to a top and antitop quark pair. The data set used in the analysis corresponds to an integrated luminosity of 680 pb(-1) collected with the Collider Detector at Fermilab in run II. We present 95% confidence level upper limits on the cross section times branching ratio. Assuming a specific top-color-assisted technicolor production model, the leptophobic Z' with width Gamma(Z')=0.012M(Z'), we exclude the mass range M(Z')<725 GeV/c(2) at the 95% confidence level.
我们报告了对衰变为顶夸克和反顶夸克对的窄宽度粒子的搜索。分析中使用的数据集对应于费米实验室对撞机探测器在运行II中收集的680 pb⁻¹的积分亮度。我们给出了截面乘以分支比的95%置信水平上限。假设一个特定的顶色辅助技术色产生模型，即宽度Γ(Z') = 0.012M(Z')的轻子ophobic Z'，我们在95%置信水平下排除了质量范围M(Z') < 725 GeV/c²。
