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| Format: | Preprint |
| Veröffentlicht: |
2024
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| Schlagworte: | |
| Online-Zugang: | https://arxiv.org/abs/2402.18731 |
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| _version_ | 1866914834140889088 |
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| author | ATLAS Collaboration |
| author_facet | ATLAS Collaboration |
| contents | Searches for the exclusive decays of the Higgs boson into $D^*γ$ and of the $Z$ boson into $D^0γ$ and $K^0_sγ$ can probe flavour-violating Higgs and $Z$ boson couplings to light quarks. Searches for these decays are performed with a $pp$ collision data sample corresponding to an integrated luminosity of $136.3$ fb$^{-1}$ collected at $\sqrt{s}=13$ TeV between 2016-2018 with the ATLAS detector at the CERN Large Hadron Collider. In the $D^*γ$ and $D^0γ$ channels, the observed (expected) 95$\%$ confidence-level upper limits on the respective branching fractions are ${\cal B}(H\rightarrow D^*γ)< 1.0 (1.2)\times 10^{-3}$, ${\cal B}(Z\rightarrow D^0γ)< 4.0 (3.4)\times 10^{-6}$, while the corresponding results in the $K^0_sγ$ channel are ${\cal B}(Z\rightarrow K^0_sγ)< 3.1 (3.0)\times 10^{-6}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_18731 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Searches for exclusive Higgs boson decays into $D^*γ$ and $Z$ boson decays into $D^0γ$ and $K^0_sγ$ in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector ATLAS Collaboration High Energy Physics - Experiment Searches for the exclusive decays of the Higgs boson into $D^*γ$ and of the $Z$ boson into $D^0γ$ and $K^0_sγ$ can probe flavour-violating Higgs and $Z$ boson couplings to light quarks. Searches for these decays are performed with a $pp$ collision data sample corresponding to an integrated luminosity of $136.3$ fb$^{-1}$ collected at $\sqrt{s}=13$ TeV between 2016-2018 with the ATLAS detector at the CERN Large Hadron Collider. In the $D^*γ$ and $D^0γ$ channels, the observed (expected) 95$\%$ confidence-level upper limits on the respective branching fractions are ${\cal B}(H\rightarrow D^*γ)< 1.0 (1.2)\times 10^{-3}$, ${\cal B}(Z\rightarrow D^0γ)< 4.0 (3.4)\times 10^{-6}$, while the corresponding results in the $K^0_sγ$ channel are ${\cal B}(Z\rightarrow K^0_sγ)< 3.1 (3.0)\times 10^{-6}$. |
| title | Searches for exclusive Higgs boson decays into $D^*γ$ and $Z$ boson decays into $D^0γ$ and $K^0_sγ$ in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2402.18731 |