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arXiv 2004.03447hep-ex
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用ATLAS探测器在$\sqrt{s}$ = 13 TeV处PDMATHAAB衰变道中的希格斯玻色子产生截面测量及其EFT解释

Higgs boson production cross-section measurements and their EFT interpretation in the $4\ell$ decay channel at $\sqrt{s}$ = 13 TeV with the ATLAS detector

ATLAS Collaboration

摘要:

利用大型强子对撞机ATLAS实验在$\sqrt{s}$ = 13 TeV能量下记录的139 fb $^{-1}$质子-质子碰撞数据,研究了四轻子衰变通道(其中轻子= $e$,$μ$)中的希格斯玻色子性质.对于绝对快度小于2.5的希格斯玻色子,$H\to ZZ^*$衰变的包含截面倍分支比为$1.34 \pm 0.12$ pb,与标准模型预测的$1.33 \pm 0.08$ pb吻合得很好。在几个相空间区域测量了希格斯玻色子玻色子主要产生模式的截面乘以分支比。的测量解释的耦合修改器和张量结构的希格斯玻色子相互作用,使用有效的场论方法。排除限制被设置在CP-偶和CP-奇的“超越标准模型”的希格斯玻色子矢量玻色子,胶子和顶夸克的耦合。

英文摘要:

Higgs boson properties are studied in the four-lepton decay channel (where lepton = $e$, $μ$) using 139 fb$^{-1}$ of proton-proton collision data recorded at $\sqrt{s}$ = 13 TeV by the ATLAS experiment at the Large Hadron Collider. The inclusive cross-section times branching ratio for $H\to ZZ^*$ decay is measured to be $1.34 \pm 0.12$ pb for a Higgs boson with absolute rapidity below 2.5, in good agreement with the Standard Model prediction of $1.33 \pm 0.08$ pb. Cross-sections times branching ratio are measured for the main Higgs boson production modes in several exclusive phase-space regions. The measurements are interpreted in terms of coupling modifiers and of the tensor structure of Higgs boson interactions using an effective field theory approach. Exclusion limits are set on the CP-even and CP-odd `beyond the Standard Model' couplings of the Higgs boson to vector bosons, gluons and top quarks.

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