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arXiv 0903.5525hep-ex
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结合ttbar截面测量和对顶夸克质量及其衰变为带电希格斯玻色子玻色子的约束

Combination of ttbar cross section measurements and constraints on the mass of the top quark and its decays into charged Higgs bosons

D0 Collaboration, V. Abazov

摘要:

我们结合测量的顶夸克对生产截面的ppbar碰撞中的l+喷流,ll和τ-l的最终状态(其中l是电子或μ子)在质心能量sqrt(s)=1.96 TeV在1 fb ^{-1}的数据收集与D 0检测器。对于顶夸克质量为170 GeV的情况,我们得到σ ttbar=8.18^{+0.98}-0.87} pb.此外,不同终态下的ttbar截面的比值被用来设定分支分数B(t -> H^{+}b -> τ nu b)和B(t -> H^{+}b -> csbar b)的上限,作为带电希格斯玻色子质量的函数。基于高阶量子色动力学的预言,我们从组合ttbar截面中提取了顶夸克的质量。

英文摘要:

We combine measurements of the top quark pair production cross section in ppbar collisions in the l+jets, ll and tau-l final states (where l is an electron or muon) at a center of mass energy of sqrt(s)=1.96 TeV in 1fb^{-1} of data collected with the D0 detector. For a top quark mass of 170 GeV, we obtain sigma_ttbar=8.18^{+0.98}_{-0.87} pb. In addition, the ratios of ttbar cross sections in different final states are used to set upper limits on the branching fractions B(t -> H^{+}b -> tau nu b) and B(t -> H^{+}b -> c sbar b) as a function of charged Higgs boson mass. Based on predictions from higher order quantum chromodynamics, we extract a mass for the top quark from the combined ttbar cross section.

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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