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1826194839356571648
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MIT
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© 2020 CERN. The first observation of the tt¯H process in a single Higgs boson decay channel with the full reconstruction of the final state (H→γγ) is presented, with a significance of 6.6 standard deviations (σ). The CP structure of Higgs boson couplings to fermions is measured, resulting in an exclusion of the pure CP-odd structure of the top Yukawa coupling at 3.2σ. The measurements are based on a sample of proton-proton collisions at a center-of-mass energy s=13 TeV collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb-1. The cross section times branching fraction of the tt¯H process is measured to be σtt¯HBγγ=1.56-0.32+0.34 fb, which is compatible with the standard model prediction of 1.13-0.11+0.08 fb. The fractional contribution of the CP-odd component is measured to be fCPHtt=0.00±0.33.
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2024-09-23T10:02:38Z
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Article
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mit-1721.1/133560
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Massachusetts Institute of Technology
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| language |
English
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2024-09-23T10:02:38Z
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| publishDate |
2021
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American Physical Society (APS)
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dspace
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| spelling |
mit-1721.1/1335602022-09-30T18:33:59Z Measurements of t t ¯ H Production and the C P Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel © 2020 CERN. The first observation of the tt¯H process in a single Higgs boson decay channel with the full reconstruction of the final state (H→γγ) is presented, with a significance of 6.6 standard deviations (σ). The CP structure of Higgs boson couplings to fermions is measured, resulting in an exclusion of the pure CP-odd structure of the top Yukawa coupling at 3.2σ. The measurements are based on a sample of proton-proton collisions at a center-of-mass energy s=13 TeV collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb-1. The cross section times branching fraction of the tt¯H process is measured to be σtt¯HBγγ=1.56-0.32+0.34 fb, which is compatible with the standard model prediction of 1.13-0.11+0.08 fb. The fractional contribution of the CP-odd component is measured to be fCPHtt=0.00±0.33. 2021-10-27T19:53:33Z 2021-10-27T19:53:33Z 2020 2021-07-09T14:23:22Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/133560 en 10.1103/PHYSREVLETT.125.061801 Physical Review Letters Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf American Physical Society (APS) APS
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| spellingShingle |
Measurements of t t ¯ H Production and the C P Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel
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| title |
Measurements of t t ¯ H Production and the C P Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel
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| title_full |
Measurements of t t ¯ H Production and the C P Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel
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| title_fullStr |
Measurements of t t ¯ H Production and the C P Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel
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| title_full_unstemmed |
Measurements of t t ¯ H Production and the C P Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel
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| title_short |
Measurements of t t ¯ H Production and the C P Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel
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| title_sort |
measurements of t t ¯ h production and the c p structure of the yukawa interaction between the higgs boson and top quark in the diphoton decay channel
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| url |
https://hdl.handle.net/1721.1/133560
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