Publicação
Search for charged Higgs bosons produced in top-quark decays or in association with top quarks and decaying via H± → ι± ντ in 13 TeV pp collisions with the ATLAS detector
| Resumo: | Charged Higgs bosons produced either in top-quark decays or in association with a top quark, subsequently decaying via \( H^\pm \rightarrow \tau^\pm \nu_\tau \), are searched for in 140\,fb\(^{-1}\) of proton-proton collision data at \(\sqrt{s} = 13\,\text{TeV}\) recorded with the ATLAS detector. Depending on whether the top quark is produced together with the \( H^\pm \) decays hadronically or semileptonically, the search targets \(\tau + \text{jets}\) or \(\tau + \text{lepton}\) final states, in both cases with a \(\tau\)-lepton decaying into a neutrino and hadrons. No significant excess over the Standard Model background expectation is observed. For the mass range of \(80 \leq m_{H^\pm} \leq 3000\,\text{GeV}\), upper limits at 95\% confidence level are set on the production cross section of the charged Higgs boson times the branching fraction \(\mathcal{B}(H^\pm \rightarrow \tau^\pm \nu_\tau)\) in the range 4.5 pb–0.4 fb. In the mass range 80–160 GeV, assuming the Standard Model cross section for \(t\overline{t}\) production, this corresponds to upper limits between 0.27\% and 0.02\% on \(\mathcal{B}(t \rightarrow b H^\pm) \times \mathcal{B}(H^\pm \rightarrow \tau^\pm \nu_\tau)\). |
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| Autores principais: | Castro, Nuno Filipe |
| Outros Autores: | Onofre, A.; ATLAS Collaboration |
| Ano: | 2025 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | Charged Higgs bosons produced either in top-quark decays or in association with a top quark, subsequently decaying via \( H^\pm \rightarrow \tau^\pm \nu_\tau \), are searched for in 140\,fb\(^{-1}\) of proton-proton collision data at \(\sqrt{s} = 13\,\text{TeV}\) recorded with the ATLAS detector. Depending on whether the top quark is produced together with the \( H^\pm \) decays hadronically or semileptonically, the search targets \(\tau + \text{jets}\) or \(\tau + \text{lepton}\) final states, in both cases with a \(\tau\)-lepton decaying into a neutrino and hadrons. No significant excess over the Standard Model background expectation is observed. For the mass range of \(80 \leq m_{H^\pm} \leq 3000\,\text{GeV}\), upper limits at 95\% confidence level are set on the production cross section of the charged Higgs boson times the branching fraction \(\mathcal{B}(H^\pm \rightarrow \tau^\pm \nu_\tau)\) in the range 4.5 pb–0.4 fb. In the mass range 80–160 GeV, assuming the Standard Model cross section for \(t\overline{t}\) production, this corresponds to upper limits between 0.27\% and 0.02\% on \(\mathcal{B}(t \rightarrow b H^\pm) \times \mathcal{B}(H^\pm \rightarrow \tau^\pm \nu_\tau)\). |
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