论文标题
$ \ sqrt {s} = $ 13 tev的质子 - 普罗顿碰撞中的电动产生四个带电的瘦素和两只喷气式的证据
Evidence for electroweak production of four charged leptons and two jets in proton-proton collisions at $\sqrt{s} =$ 13 TeV
论文作者
论文摘要
在设置了两种Z实量和在异常的四分音量规耦合上的两种Z玻璃物以及约束的相关性的Electroweak（EW）生产的证据（EW）。该分析基于$ \ sqrt {s} = $ 13 tev在2016- 2018年收集的proton-proton碰撞的数据样本，对应于137 fb $^{ - 1} $的集成光度。该搜索是在完全缓慢的最终状态ZZ $ \至$ \ ell \ ell \ ell \ ell'\ ell'$中执行的，其中$ \ ell，\ ell'= $ e，$μ$。测量了两种与两个Z玻色子相关的EW产生，观察到的（预期）显着性为4.0（3.5）标准偏差。 EW生产的横截面以三个基准量进行测量，结果为$σ_ {\ Mathrm {ew}} $（pp $ \ to $ zzjj $ \ to $ zzjj $ \ to $ \ ell \ ell \ ell \ ell \ ell \ ell \ ell \ ell'\ ell'\ ell'\ ell'$ jj） $^{+0.04} _ { - 0.03} $（SYST）$（SYST）fb最包含的卷，与标准模型预测为0.275 $ \ pm $ 0.021 fb一致。还报道了JJ产生的总横截面的测量与两个Z实量相关。异常的四分音量规耦合的限制是根据有效的现场理论运算符T0，T1，T2，T8和T9得出的。
Evidence is presented for the electroweak (EW) production of two jets (jj) in association with two Z bosons and constraints on anomalous quartic gauge couplings are set. The analysis is based on a data sample of proton-proton collisions at $\sqrt{s} = $ 13 TeV collected with the CMS detector in 2016-2018, and corresponding to an integrated luminosity of 137 fb$^{-1}$. The search is performed in the fully leptonic final state ZZ $\to$ $\ell\ell\ell'\ell'$, where $\ell,\ell' = $ e, $μ$. The EW production of two jets in association with two Z bosons is measured with an observed (expected) significance of 4.0 (3.5) standard deviations. The cross sections for the EW production are measured in three fiducial volumes and the result is $σ_{\mathrm{EW}}$(pp $\to$ ZZjj $\to$ $\ell\ell\ell'\ell'$jj) = 0.33 $^{+0.11}_{-0.10}$ (stat) $^{+0.04}_{-0.03}$ (syst) fb in the most inclusive volume, in agreement with the standard model prediction of 0.275 $\pm$ 0.021 fb. Measurements of total cross sections for jj production in association with two Z bosons are also reported. Limits on anomalous quartic gauge couplings are derived in terms of the effective field theory operators T0, T1, T2, T8, and T9.
