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arXiv 1310.0486hep-ex
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用$\sqrt{s}$ = 8 TeV质子-质子碰撞的14 fb PDMATHAAC寻找含ATLAS的轻子加喷注事例中的$t\bar{t}$共振

A Search for $t\bar{t}$ Resonances in Lepton Plus Jets Events with ATLAS using 14 fb$^{-1}$ of Proton-Proton Collisions at $\sqrt{s}$ = 8 TeV

Ruchika Nayyar

摘要:

一些超越标准模型的理论预言新粒子主要衰变为顶-反顶夸克对。在大型强子对撞机(LHC)的ATLAS实验中,利用$\sqrt{s}$ = 8 TeV的14 fb $^{-1}$,对衰变到轻子加喷流末态的顶-反顶夸克共振进行了研究.搜索考虑了两种情况,即所有的终态喷流都是孤立的,以及一些或所有的顶夸克衰变产物合并成一个喷流。在95%的可信度水平的质量排斥限制设置为两个基准模型,一个预测轻子顶色Z'玻色子和其他预测兰德尔Sundrum卡鲁扎克莱因胶子。

英文摘要:

Some Beyond the Standard Model theories predict new particles that decay predominantly into top-antitop quark pairs. A search for top-antitop quark resonances that decay into the lepton plus jets final state is carried out with the ATLAS experiment at the LHC using 14 fb$^{-1}$ of $\sqrt{s}$ = 8 TeV proton-proton collisions. The search considers both cases where all of the final state jets are isolated and where some or all of the top quark decay products are merged into a single jet. Mass exclusion limits at a 95% credibility level are set for two benchmark models, one predicting leptophobic topcolor Z' bosons and the other predicting Randall-Sundrum Kaluza-Klein gluons.

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