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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.19611 |
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| _version_ | 1866916748666601472 |
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| author | ATLAS Collaboration |
| author_facet | ATLAS Collaboration |
| contents | A study of the Higgs boson decaying into bottom quarks ($H \to b\bar{b}$) and charm quarks ($H \to c\bar{c}$) is performed, in the associated production channel of the Higgs boson with a $W$ or $Z$ boson, using $140\,\mathrm{fb}^{-1}$ of proton-proton collision data at $\sqrt{s} = 13\,\mathrm{TeV}$ collected by the ATLAS detector. The individual production of $WH$ and $ZH$ with $H \to b\bar{b}$ is established with observed (expected) significances of $5.3$ ($5.5$) and $4.9$ ($5.6$) standard deviations, respectively. Differential cross-section measurements of the gauge boson transverse momentum within the simplified template cross-section framework are performed in a total of 13 kinematical fiducial regions.
The search for the $H \to c\bar{c}$ decay yields an observed (expected) upper limit at 95\% confidence level of $11.5$ ($10.6$) times the Standard Model prediction. The results are also used to set constraints on the charm coupling modifier, resulting in $|κ_c| < 4.2$ at 95\% confidence level. Combining the $H \to b\bar{b}$ and $H \to c\bar{c}$ measurements constrains the absolute value of the ratio of Higgs-charm and Higgs-bottom coupling modifiers ($|κ_c/κ_b|$) to be less than $3.6$ at 95$\% $ confidence level. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_19611 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Measurements of $WH$ and $ZH$ production with Higgs boson decays into bottom quarks and direct constraints on the charm Yukawa coupling in $13\,\mathrm{TeV}$ $pp$ collisions with the ATLAS detector ATLAS Collaboration High Energy Physics - Experiment A study of the Higgs boson decaying into bottom quarks ($H \to b\bar{b}$) and charm quarks ($H \to c\bar{c}$) is performed, in the associated production channel of the Higgs boson with a $W$ or $Z$ boson, using $140\,\mathrm{fb}^{-1}$ of proton-proton collision data at $\sqrt{s} = 13\,\mathrm{TeV}$ collected by the ATLAS detector. The individual production of $WH$ and $ZH$ with $H \to b\bar{b}$ is established with observed (expected) significances of $5.3$ ($5.5$) and $4.9$ ($5.6$) standard deviations, respectively. Differential cross-section measurements of the gauge boson transverse momentum within the simplified template cross-section framework are performed in a total of 13 kinematical fiducial regions. The search for the $H \to c\bar{c}$ decay yields an observed (expected) upper limit at 95\% confidence level of $11.5$ ($10.6$) times the Standard Model prediction. The results are also used to set constraints on the charm coupling modifier, resulting in $|κ_c| < 4.2$ at 95\% confidence level. Combining the $H \to b\bar{b}$ and $H \to c\bar{c}$ measurements constrains the absolute value of the ratio of Higgs-charm and Higgs-bottom coupling modifiers ($|κ_c/κ_b|$) to be less than $3.6$ at 95$\% $ confidence level. |
| title | Measurements of $WH$ and $ZH$ production with Higgs boson decays into bottom quarks and direct constraints on the charm Yukawa coupling in $13\,\mathrm{TeV}$ $pp$ collisions with the ATLAS detector |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2410.19611 |