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arXiv 1812.02112hep-ex
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在用ATLAS探测器在$\sqrt{s}$ = 13 TeV收集的PDMATHAAB碰撞数据中,搜索至少一个$Z$玻色子衰变为一对电子或μ子的最终状态中的类矢量夸克的成对产生

Search for pair-production of vector-like quarks in final states with at least one $Z$ boson decaying into a pair of electrons or muons in $pp$ collision data collected with the ATLAS detector at $\sqrt{s}$ = 13 TeV

Tiago Vale

摘要:

利用大型强子对撞机ATLAS实验收集的2015年和2016年$\sqrt{s}~=~13~$ TeV的$pp$碰撞数据,对应于积分光度$36.1~$ fb $^{-1}$,对衰变为$Z$玻色子和第三代夸克的成对产生矢量类夸克进行了搜索.没有发现明显超过标准模型预期的结果,因此在95%的置信水平下,将单重态(双重态)$T$的矢量类夸克质量的排除下限设定为1030(1210)GeV,单重态(双重态)$B$的排除下限设定为1010(1140)GeV。

英文摘要:

A search for pair-produced vector-like quarks decaying into a $Z$ boson and a third generation quark using 2015 and 2016 $pp$ collision data at $\sqrt{s}~=~13~$TeV collected by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of $36.1~$fb$^{-1}$, is presented. No significant excess over the Standard Model expectation was found so lower exclusion limits at 95% confidence level were set on the vector-like quark masses at 1030 (1210) GeV for singlet (doublet) $T$ and 1010 (1140) GeV for singlet (doublet) $B$.

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