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arXiv 1609.01599hep-ex
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用ATLAS探测器测量在$\sqrt{s}$ = 13 TeV的$pp$碰撞的3.2 fb PDMATHAAC多轻子末态$t\bar{t}Z$和$t\bar{t}W$产生截面

Measurement of the $t\bar{t}Z$ and $t\bar{t}W$ production cross sections in multilepton final states using 3.2 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector

ATLAS Collaboration

摘要:

本文测量了两个同电荷μ子或三个或四个轻子(电子或μ子)的末态$t\bar{t}Z$和$t\bar{t}W$产生截面。该分析使用了2015年在大型强子对撞机上使用ATLAS探测器记录的$\sqrt{s} = 13$ TeV质子-质子碰撞的数据样本,对应于3.2 fb $^{-1}$的总积分光度。使用信号和对照区域的似然拟合提取包容性截面,得到与标准模型预测一致的$σ_{t\bar{t}Z} = 0.9 \pm 0.3$ pb和$σ_{t\bar{t}W} = 1.5 \pm 0.8$ pb。

英文摘要:

A measurement of the $t\bar{t}Z$ and $t\bar{t}W$ production cross sections in final states with either two same-charge muons, or three or four leptons (electrons or muons) is presented. The analysis uses a data sample of proton-proton collisions at $\sqrt{s} = 13$ TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015, corresponding to a total integrated luminosity of 3.2 fb$^{-1}$. The inclusive cross sections are extracted using likelihood fits to signal and control regions, resulting in $σ_{t\bar{t}Z} = 0.9 \pm 0.3$ pb and $σ_{t\bar{t}W} = 1.5 \pm 0.8$ pb, in agreement with the Standard Model predictions.

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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