在质子-质子碰撞中 $\sqrt{s}$ = 13 TeV 下研究 bb$\tau\tau$ 末态的 ZZ 和 ZH 产生并寻找高自旋 0 和自旋 1 共振
Study of ZZ and ZH production in the bb$ττ$ final state and search for high-mass spin-0 and spin-1 resonances in proton-proton collisions at $\sqrt{s}$ = 13 TeV
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中文总结 AI 辅助
基于 CMS 实验 138 fb$^{-1}$ 数据，研究 bb$\tau\tau$ 末态的 ZZ 和 ZH 产生，并寻找质量在 0.2-5 TeV 和 0.5-6 TeV 的自旋 0 和自旋 1 共振，未发现超出标准模型预期。
中文摘要 AI 辅助
本文介绍了在包含两个 b 夸克和两个 τ 轻子（bb$\tau\tau$）的末态中，Z 玻色子对（ZZ）产生以及 Z 玻色子与希格斯玻色子（ZH）联合产生的研究。该分析基于 LHC 上 CMS 实验在 $\sqrt{s}$ = 13 TeV 下收集的质子-质子碰撞数据，对应积分亮度为 138 fb$^{-1}$。非共振分析针对标准模型 ZZ 和 ZH 过程在 bb$\tau\tau$ 末态中的产生，其动机是该通道在非共振希格斯玻色子对产生搜索中的重要作用。共振搜索针对超出标准模型的物理，探测衰变为 ZZ 的重自旋 0 共振 X 和衰变为 ZH 的自旋 1 共振 Z'，质量范围分别为 0.2$-$5 TeV 和 0.5$-$6 TeV。在 95% 置信水平上，对产生率与分支比的乘积 $\sigma$(X)$\mathcal{B}$(X $\to$ ZZ) 设置了上限，范围从 300 pb 到 24 fb，对 $\sigma$(Z')$\mathcal{B}$(Z' $\to$ ZH) 设置了上限，范围从 0.4 pb 到 12 fb。这是首次探测 ZZ/ZH $\to$ bb$\tau\tau$ 过程的测量。未观察到与标准模型预期的偏差。
英文摘要
A study of the production of pairs of Z bosons (ZZ) and of the associated production of a Z boson and a Higgs boson (ZH) in final states containing two b quarks and two tau leptons (bb$ττ$) is presented. The analysis is based on proton-proton collisions collected at $\sqrt{s}$ = 13 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 138 fb$^{-1}$. The nonresonant analysis targets the standard model ZZ and ZH processes in the bb$ττ$ final state, motivated by the prominent role of this channel in searches for nonresonant Higgs boson pair production. The resonant searches target physics beyond the standard model, probing heavy spin-0 resonances X that decay into ZZ and spin-1 resonances Z' that decay into ZH, with masses in the 0.2$-$5 and 0.5$-$6 TeV ranges, respectively. Upper limits at 95% confidence level are set on the product of production rate and branching fraction $σ$(X)$\mathcal{B}$(X $\to$ ZZ), ranging from 300 pb to 24 fb, and $σ$(Z')$\mathcal{B}$(Z' $\to$ ZH), ranging from 0.4 pb to 12 fb. These are the first measurements to probe the ZZ/ZH $\to$ bb$ττ$ processes. No deviation from standard model expectations is observed.
