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arXiv 2103.06956hep-ex
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$\sqrt{s} = $ 13 TeV双光子衰变通道中希格斯玻色子产生截面和耦合的测量

Measurements of Higgs boson production cross sections and couplings in the diphoton decay channel at $\sqrt{s} = $ 13 TeV

CMS Collaboration

摘要:

本文报道了在希格斯玻色子衰变为一对光子的事件中希格斯玻色子产生截面和耦合的测量结果。事件选自2016年至2018年LHC CMS探测器收集的$\sqrt{s} =$ 13 TeV质子-质子碰撞样本,对应于137 fb $^{-1}$的积分亮度。构造了富含胶子融合、矢量玻色子融合、矢量玻色子关联产生和顶夸克关联产生的希格斯玻色子玻色子事件的分析范畴。总的希格斯玻色子信号强度,相对于标准模型(SM)的预测,测量为1.12 $\pm$ 0.09。希格斯玻色子的其他属性的测量,包括SM信号强度修改器,生产截面,和它的耦合到其他粒子。其中包括对几个不同运动学区域中胶子融合和矢量玻色子融合希格斯玻色子产生的最精确测量、对与五个希格斯玻色子横向动量区域中顶夸克对相关的希格斯玻色子产生的首次测量,以及与单个顶夸克相关的希格斯玻色子产生速率的上限。所有的结果被发现是在与SM的期望一致。

英文摘要:

Measurements of Higgs boson production cross sections and couplings in events where the Higgs boson decays into a pair of photons are reported. Events are selected from a sample of proton-proton collisions at $\sqrt{s} =$ 13 TeV collected by the CMS detector at the LHC from 2016 to 2018, corresponding to an integrated luminosity of 137 fb$^{-1}$. Analysis categories enriched in Higgs boson events produced via gluon fusion, vector boson fusion, vector boson associated production, and production associated with top quarks are constructed. The total Higgs boson signal strength, relative to the standard model (SM) prediction, is measured to be 1.12 $\pm$ 0.09. Other properties of the Higgs boson are measured, including SM signal strength modifiers, production cross sections, and its couplings to other particles. These include the most precise measurements of gluon fusion and vector boson fusion Higgs boson production in several different kinematic regions, the first measurement of Higgs boson production in association with a top quark pair in five regions of the Higgs boson transverse momentum, and an upper limit on the rate of Higgs boson production in association with a single top quark. All results are found to be in agreement with the SM expectations.

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