ATLAS Measurements of the Higgs Boson Coupling to the Top Quark in the Higgs to Diphoton Decay Channel(Springer Theses)

希格斯粒子到双光子衰变通道中与顶夸克的希格斯玻色子耦合的图形测量

高能物理学

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作      者
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出版时间
2021年12月14日
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ISBN
9783030863678
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语      种
英文
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图书简介
During Run 2 of the Large Hadron Collider, the ATLAS experiment recorded proton-proton collision events at 13 TeV, the highest energy ever achieved in a collider. Analysis of this dataset has provided new opportunities for precision measurements of the Higgs boson, including its interaction with the top quark. The Higgs-top coupling can be directly probed through the production of a Higgs boson in association with a top-antitop quark pair (ttH). The Higgs to diphoton decay channel is among the most sensitive for ttH measurements due to the excellent diphoton mass resolution of the ATLAS detector and the clean signature of this decay. Event selection criteria were developed using novel Machine Learning techniques to target ttH events, yielding a precise measurement of the ttH cross section in the diphoton channel and a 6.3 $sigma$ observation of the ttH process in combination with other decay channels, as well as stringent limits onCP violation in the Higgs-top coupling.
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