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High-precision limits on W – $$W'$$W′ and Z – $$Z'$$Z′ mixing from diboson production using the full LHC Run 2 ATLAS data set
The European Physical Journal C ( IF 4.4 ) Pub Date : 2020-06-05 , DOI: 10.1140/epjc/s10052-020-8075-7
A. A. Pankov , P. Osland , I. A. Serenkova , V. A. Bednyakov

The full ATLAS Run 2 data set with time-integrated luminosity of \(139 \, {\text {fb}}^{-1}\) in the diboson channels in hadronic final states is used to probe a simple model with an extended gauge sector (EGM), proposed by Altarelli et al., and often taken as a convenient benchmark by experimentalists. This model accommodates new charged \(W'\) and neutral \(Z'\) vector bosons with modified trilinear Standard Model gauge couplings, decaying into electroweak gauge boson pairs WZ or WW, where W/Z decay hadronically. Exclusion limits at the 95% CL on the \(Z'\) and \(W'\) resonance production cross section times branching ratio to electroweak gauge boson pairs in the mass range of \(\sim \) 1–5 TeV are here converted to constraints on W\(W'\) and Z\(Z'\) mixing parameters and masses for the EGM. We present exclusion regions on the parameter space of the \(W'\) and \(Z'\) by using the full Run 2 data set comprised of pp collisions at \(\sqrt{s}=13 \, \hbox {TeV}\) and recorded by the ATLAS detector at the CERN LHC. The obtained exclusion regions are significantly extended compared to those obtained from the previous analysis performed with Tevatron data as well as with LHC data collected at 7 and 8 TeV in Run 1 and are the most stringent bounds to date.



中文翻译:

使用完整的LHC Run 2 ATLAS数据集,由地牢生产产生的W – $$ W'$ W'和Z – $$ Z'$ Z'的高精度限制

完整的ATLAS Run 2数据集在强子性最终状态下在diboson通道中具有\(139 \,{\ text {fb}} ^ {-1} \)的时间积分亮度,用于探测扩展了的简单模型规范部门(EGM),由Altarelli等人提出,并经常被实验者视为方便的基准。该模型可容纳新的带电的\(W'\)和中性的\(Z'\)矢量玻色子,该玻色子具有经过修改的三线性标准模型规格耦合,衰减为电弱规格玻色子对WZWW,其中W / Z强子衰减。\(Z'\)\(W'\)的95%CL处的排除限制\(\ sim \) 1–5 TeV的质量范围内,共振产生的横截面时间与电弱规格玻色子对的分支比被转换为W\(W'\)Z\(Z'\)的约束EGM的混合参数和质量。我们使用\(\ sqrt {s} = 13 \,\ hbox {pp冲突)构成的完整运行2数据集,在\(W'\)\(Z'\)的参数空间上显示排除区域。TeV} \)并由CERN LHC的ATLAS探测器记录。与从先前的分析中获得的排除区域相比,Tevatron数据以及运行1中在第7和8 TeV收集的LHC数据获得的排除区域显着扩展,并且是迄今为止最严格的范围。

更新日期:2020-06-05
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