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arXiv 2006.11191hep-ex
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在$\sqrt{s} =$ 13 TeV上观察到三个大质量规范玻色子的产生

Observation of the production of three massive gauge bosons at $\sqrt{s} =$ 13 TeV

CMS Collaboration

摘要:

首次观测到在质心能量为13 TeV的质子-质子碰撞中产生三个大质量规范玻色子(VVV,V = W,Z)。该分析是基于CMS实验在欧洲核子研究中心大型强子对撞机记录的数据样本,对应于137 fb $^{-1}$的积分亮度。对单个WWW、WWZ、WZZ和ZZZ产生的搜索是在具有三个、四个、五个和六个轻子(电子或μ子)的最终状态下进行的,或者是在具有两个相同符号的轻子加上一个或两个喷流的最终状态下进行的。组合VVV产生信号的观测(预期)显著性为5.7(5.9)标准偏差,相对于标准模型预测的相应测量横截面为1.02 $^{+0.26}_{-0.23}$。单个WWW和WWZ产量的显著性分别为3.3和3.4标准差。测量的生产截面的个别triboson过程也报告。

英文摘要:

The first observation is reported of the combined production of three massive gauge bosons (VVV with V = W,Z) in proton-proton collisions at a center-of-mass energy of 13 TeV. The analysis is based on a data sample recorded by the CMS experiment at the CERN LHC corresponding to an integrated luminosity of 137 fb$^{-1}$. The searches for individual WWW, WWZ, WZZ, and ZZZ production are performed in final states with three, four, five, and six leptons (electrons or muons), or with two same-sign leptons plus one or two jets. The observed (expected) significance of the combined VVV production signal is 5.7 (5.9) standard deviations and the corresponding measured cross section relative to the standard model prediction is 1.02 $^{+0.26}_{-0.23}$. The significances of the individual WWW and WWZ production are 3.3 and 3.4 standard deviations, respectively. Measured production cross sections for the individual triboson processes are also reported.

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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