论文标题
electroweak $ z（ν\barν）γjj$生产的测量和限制异常的四分光量规耦合$ pp $ collisions in $ \ sqrt {s} = 13 $ tev a atlas detector
Measurement of electroweak $Z(ν\barν)γjj$ production and limits on anomalous quartic gauge couplings in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
论文作者
论文摘要
使用Proton-Proton碰撞，在大型Hadron Collider的13 TEV中，使用Proton-Proton Collions在130 GEV上高于150 GEV的光子，在$ Z（ν\ bar N）γ$的$ z（ν\barν）γ$中与两种喷气式相关。该分析使用的数据样本的集成发光度为139 fb $^{ - 1} $，该数据在2015 - 2018年LHC数据研究期间收集了Atlas检测器。此过程是标准模型中电动对称性破坏机理的重要探针，并且通过矢量 - 玻色子散射对四分仪表玻色子耦合敏感。基金$ z（ν\barν）γjj$用于电动生产的横截面为0.77 $^{+0.34} _ { - 0.30} $ fb，并且与标准模型预测一致。发现electroweak $ z（ν\barν）γjj$生产的证据，观察到仅背景假设的显着性为3.2 $σ$，而预期意义为3.7 $σ$。该结果与先前发表的Atlas观察到Electroweak $ Z（ν\barν）γjj$生产的结合产生了观察到的（预期的）信号意义，为6.3 $σ$（6.6 $σ$）。在有效的现场理论的框架中，通过Dimension-8运算符的框架获得了异常的四分音仪玻色子耦合的限制。
The electroweak production of $Z(ν\barν)γ$ in association with two jets is studied in a regime with a photon of high transverse momentum above 150 GeV using proton-proton collisions at a centre-of-mass energy of 13 TeV at the Large Hadron Collider. The analysis uses a data sample with an integrated luminosity of 139 fb$^{-1}$ collected by the ATLAS detector during the 2015-2018 LHC data-taking period. This process is an important probe of the electroweak symmetry breaking mechanism in the Standard Model and is sensitive to quartic gauge boson couplings via vector-boson scattering. The fiducial $Z(ν\barν)γjj$ cross section for electroweak production is measured to be 0.77$^{+0.34}_{-0.30}$ fb and is consistent with the Standard Model prediction. Evidence of electroweak $Z(ν\barν)γjj$ production is found with an observed significance of 3.2$σ$ for the background-only hypothesis, compared with an expected significance of 3.7$σ$. The combination of this result with the previously published ATLAS observation of electroweak $Z(ν\barν)γjj$ production yields an observed (expected) signal significance of 6.3$σ$ (6.6$σ$). Limits on anomalous quartic gauge boson couplings are obtained in the framework of effective field theory with dimension-8 operators.
