The observation of the standard model (SM) Higgs boson decay to a pair of bottom quarks is presented. The main contribution to this result is from processes in which Higgs bosons are produced in association with a $W$ or $Z$ boson ($VH$), and are searched for in final states including 0, 1, or 2 charged leptons and two identified bottom quark jets. The results from the measurement of these processes in a data sample recorded by the CMS experiment in 2017, comprising $41.3{\mathrm{fb}}^{-1}$ of proton-proton collisions at $\sqrt{s}=13\mathrm{TeV}$, are described. When combined with previous $VH$ measurements using data collected at $\sqrt{s}=7$, 8, and 13 TeV, an excess of events is observed at $m_H=125\mathrm{GeV}$ with a significance of 4.8 standard deviations, where the expectation for the SM Higgs boson is 4.9. The corresponding measured signal strength is $1.01\pm 0.22$. The combination of this result with searches by the CMS experiment for $H\to b\overline{b}$ in other production processes yields an observed (expected) significance of 5.6 (5.5) standard deviations and a signal strength of $1.04\pm 0.20$.

中文翻译：

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希格斯玻色子衰变至底部夸克

介绍了对标准模型（SM）希格斯玻色子衰变到一对底部夸克的观察。对这一结果的主要贡献是由希格斯玻色子与$\mathrm{w\; ^}$ 或者 $ž$ 玻色子（$\mathrm{伏特}H$），并在最终状态下进行搜索，包括0、1或2个带电荷的轻子和两个确定的底部夸克喷嘴。CMS实验在2017年记录的数据样本中这些过程的测量结果，包括$41.3{\mathrm{fb}}^{-\mathrm{1个}}$ 质子-质子碰撞 $\sqrt{s}=13\mathrm{电视}$进行说明。当与以前的结合时$\mathrm{伏特}H$ 使用在以下位置收集的数据进行测量 $\sqrt{s}=7$，8和13 TeV，在 ${米}_H=125\mathrm{GeV}$具有4.8个标准差的显着性，其中SM希格斯玻色子的期望值为4.9。相应的测量信号强度为$1.01\pm 0.22$。此结果与CMS实验搜索的结果相结合$H\to b\overline{b}$ 在其他生产过程中，观察到的（预期的）显着性为5.6（5.5）标准偏差，信号强度为 $1.04\pm 0.20$。