Probing the $CP$ nature of the top-Higgs Yukawa coupling in $t\bar{t}H$ and $tH$ events with $H \to b\bar{b}$ decays using the ATLAS detector at the LHC
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arXiv
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866913316126851072 |
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| author | ATLAS Collaboration |
| author_facet | ATLAS Collaboration |
| contents | The $CP$ properties of the coupling between the Higgs boson and the top quark are investigated with 139 fb$^{-1}$ of proton-proton collision data recorded by the ATLAS experiment at the LHC at a centre-of-mass energy of $\sqrt{s}=13$ TeV. The $CP$ structure of the top quark-Higgs boson Yukawa coupling is probed in events with a Higgs boson decaying into a pair of $b$-quarks and produced in association with either a pair of top quarks, $t\bar{t}H$, or a single top quark, $tH$. Events containing one or two electrons or muons are used for the measurement. In an extension of the Standard Model with a $CP$-odd admixture to the top-Higgs Yukawa coupling, the mixing angle between $CP$-even and $CP$-odd couplings is measured to be $α=11\,^{\circ+52^{\circ}}_{ -73^{\circ}}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_05974 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Probing the $CP$ nature of the top-Higgs Yukawa coupling in $t\bar{t}H$ and $tH$ events with $H \to b\bar{b}$ decays using the ATLAS detector at the LHC ATLAS Collaboration High Energy Physics - Experiment The $CP$ properties of the coupling between the Higgs boson and the top quark are investigated with 139 fb$^{-1}$ of proton-proton collision data recorded by the ATLAS experiment at the LHC at a centre-of-mass energy of $\sqrt{s}=13$ TeV. The $CP$ structure of the top quark-Higgs boson Yukawa coupling is probed in events with a Higgs boson decaying into a pair of $b$-quarks and produced in association with either a pair of top quarks, $t\bar{t}H$, or a single top quark, $tH$. Events containing one or two electrons or muons are used for the measurement. In an extension of the Standard Model with a $CP$-odd admixture to the top-Higgs Yukawa coupling, the mixing angle between $CP$-even and $CP$-odd couplings is measured to be $α=11\,^{\circ+52^{\circ}}_{ -73^{\circ}}$. |
| title | Probing the $CP$ nature of the top-Higgs Yukawa coupling in $t\bar{t}H$ and $tH$ events with $H \to b\bar{b}$ decays using the ATLAS detector at the LHC |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2303.05974 |