Publicação
Searches for exclusive Higgs boson decays into D*γ and Z boson decays into D0γ and K0sγ in pp collisions at √s=13 TeV with the ATLAS detector
| Resumo: | Searches for exclusive decays of the Higgs boson into \( D^*\gamma \) and of the \( Z \) boson into \( D^0\gamma \) and \( K^0_s \gamma \) can probe flavour-violating Higgs boson 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 \( D^*\gamma \) and \( D^0\gamma \) channels, the observed (expected) 95% confidence-level upper limits on the respective branching fractions are \( \mathcal{B}(H \rightarrow D^*\gamma) < 1.0(1.2) \times 10^{-3} \), \( \mathcal{B}(Z \rightarrow D^0\gamma) < 4.0(3.4) \times 10^{-6} \), while the corresponding results in the \( K^0_s \gamma \) channel are \( \mathcal{B}(Z \rightarrow K^0_s \gamma) < 3.1(3.0) \times 10^{-6} \). |
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| Autores principais: | Castro, Nuno Filipe |
| Outros Autores: | Onofre, A.; ATLAS Collaboration |
| Assunto: | Ciências Naturais::Ciências Físicas |
| Ano: | 2024 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | Searches for exclusive decays of the Higgs boson into \( D^*\gamma \) and of the \( Z \) boson into \( D^0\gamma \) and \( K^0_s \gamma \) can probe flavour-violating Higgs boson 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 \( D^*\gamma \) and \( D^0\gamma \) channels, the observed (expected) 95% confidence-level upper limits on the respective branching fractions are \( \mathcal{B}(H \rightarrow D^*\gamma) < 1.0(1.2) \times 10^{-3} \), \( \mathcal{B}(Z \rightarrow D^0\gamma) < 4.0(3.4) \times 10^{-6} \), while the corresponding results in the \( K^0_s \gamma \) channel are \( \mathcal{B}(Z \rightarrow K^0_s \gamma) < 3.1(3.0) \times 10^{-6} \). |
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