Measurements of t¯tH Production and the CP Structure of the Yukawa Interaction between the Higgs Boson and Top Quark in the Diphoton Decay Channel; Physical Review Letters; Vol. 125, iss. 6
| Parent link: | Physical Review Letters Vol. 125, iss. 6.— 2020.— [061801, 18 p.] |
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| 団体著者: | |
| その他の著者: | , , , , , |
| 要約: | Title screen The first observation of the t¯tH 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 t¯tH process is measured to be σt¯tHBγγ=1.56+0.34−0.32 fb, which is compatible with the standard model prediction of 1.13+0.08−0.11 fb. The fractional contribution of the CP-odd component is measured to be fHttCP=0.00±0.33. Режим доступа: по договору с организацией-держателем ресурса |
| 言語: | 英語 |
| 出版事項: |
2020
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| 主題: | |
| オンライン･アクセス: | https://doi.org/10.1103/PhysRevLett.125.061801 |
| フォーマット: | 電子媒体 図書の章 |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666237 |