论文标题
$ \ mathrm {t \ bar {t} h/th} $ CMS的生产
$\mathrm{t\bar{t}H/tH}$ production at CMS
论文作者
论文摘要
希格斯玻色子发现后，CERN LHC的主要重点是其性质的测量。观察Higgs Boson与顶级夸克 - 易药对（$ \ Mathrm {t \ bar {t} H} $）相关的生产特别有趣，因为它为测量Higgs Boson-Top Quark Quark Yukawa coupling提供了树级别的访问。但是，与希格斯玻色子（$ \ mathrm {th} $）相关的单个顶级夸克也对此耦合的迹象也很敏感。这种耦合对于高能尺度上希格斯电位的稳定性至关重要，也可以是对标准模型（SM）以外的物理学的探测。 $ \ mathrm {t \ bar {t} h} $和$ \ mathrm {th} $相关的生产率的最新测量值由CMS合作与Proton-Proton Collision Events在$ \ sqrt {s} = 13 $ tev in diphoton and Multilepton Channels中呈现在$ \ sqrt {s} = 13 $ tev的proton-proton碰撞事件。事件是根据Lepton和Jet Mulutllicities进行分类的，并且使用多元分类器将信号与背景过程区分开。结果与SM预测一致，并具有对$ \ mathrm {t \ bar {t} h} $生产的首次观察，并在单个Higgs玻色子衰减通道中生产以及其CP结构的首次测试。
After the Higgs boson discovery, a main focus at the CERN LHC has been the measurement of its properties. Observing the Higgs boson associated production with a top quark-antiquark pair ($\mathrm{t\bar{t}H}$) is particularly interesting because it provides tree-level access to measuring the Higgs boson-top quark Yukawa coupling. However, the production of a single top quark in association with the Higgs boson ($\mathrm{tH}$) is also sensitive to the sign of this coupling. This coupling is essential for the stability of the Higgs potential at high energy scales and can also be a probe for physics beyond the standard model (SM). The latest measurements of the $\mathrm{t\bar{t}H}$ and $\mathrm{tH}$ associated production rates performed by the CMS Collaboration with proton-proton collision events at $\sqrt{s} =13$ TeV in the diphoton and multilepton channels are presented here. Events are categorized according to the lepton and jet multiplicities, and multivariate classifiers are used to distinguish signal from background processes. The results are consistent with the SM predictions and feature the first observation of $\mathrm{t\bar{t}H}$ production in a single Higgs boson decay channel along with the first tests of its CP structure.
