Observation of Higgs boson decay to bottom quarks
Observation of Higgs boson decay to bottom quarks
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DOI：
10.2172/1614719
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发表时间：
2019-01
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影响因子：
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通讯作者：
S. Cooperstein
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文献类型：
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作者：
S. Cooperstein
本文介绍了标准模型希格斯玻色子衰变为底夸克-反夸克对的观测结果。对这一结果的主要贡献来自希格斯玻色子与W或Z玻色子联合产生的过程。本文描述了这些过程的最新测量结果，使用了CMS实验在2017年收集的41.3 fb−1的质子-质子碰撞数据，质心能量为13 TeV。观察到的数据超过标准模型背景的显著性为3.3个标准差。该结果与CMS对先前数据集进行的类似测量相结合，导致观察到的显著性为5.6标准差。测量的信号与标准模型对mH = 125 GeV的希格斯玻色子衰变为底夸克的预期非常一致，精度为20%。
The observation of the Standard Model Higgs boson decay to a bottom quarkantiquark pair is presented. The primary contribution to this result is from processes in which the Higgs boson is produced in association with a W or Z boson. The latest measurement of these processes is described, using 41.3 fb−1 of proton-proton collision data at center-of-mass energy √ s = 13 TeV, collected by the CMS experiment in 2017. The significance of the observed excess in data over Standard Model backgrounds is 3.3 standard deviations. The result is combined with similar measurements performed by CMS on previous datasets, resulting in an observed significance of 5.6 standard deviations. The measured signal is well consistent with the Standard Model expectation for a Higgs boson with mH = 125 GeV decaying to bottom quarks, with a precision of 20%.