Publicação
Search for heavy resonances in final states with four leptons and missing transverse momentum or jets in pp collisions at √s=13 TeV with the ATLAS detector
| Resumo: | A search for a new heavy boson produced via gluon-fusion in the four-lepton channel with missing transverse momentum or jets is performed. The search uses proton proton collision data equivalent to an integrated luminosity of 139 fb\(^{-1}\) at a centre-of-mass energy of 13 TeV collected by the ATLAS detector between 2015 and 2018 at the Large Hadron Collider. This study explores the decays of heavy bosons: \( R \rightarrow SH \) and \( A \rightarrow ZH \), where \( R \) is a CP-even boson, \( A \) is a CP-odd boson, \( H \) is a CP-even boson, and \( S \) is considered to decay into invisible particles that are candidates for dark matter. In these processes, \( S \rightarrow \text{invisible} \) and \( H \rightarrow ZZ \). The \( Z \) boson associated with the heavy scalar boson \( H \) decays into all decay channels of the \( Z \) boson. The mass range under consideration is 390–1300 (320–1300) GeV for the \( R \) (\( A \)) boson and 220–1000 GeV for the \( H \) boson. No significant deviation from the Standard Model backgrounds is observed. The results are interpreted as upper limits at a 95% confidence level on the cross-section times the branching ratio of the heavy resonances. |
|---|---|
| Autores principais: | Castro, Nuno Filipe |
| Outros Autores: | Onofre, A.; ATLAS Collaboration |
| Assunto: | Hadron-Hadron Scattering Particle and Resonance Production |
| 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: | A search for a new heavy boson produced via gluon-fusion in the four-lepton channel with missing transverse momentum or jets is performed. The search uses proton proton collision data equivalent to an integrated luminosity of 139 fb\(^{-1}\) at a centre-of-mass energy of 13 TeV collected by the ATLAS detector between 2015 and 2018 at the Large Hadron Collider. This study explores the decays of heavy bosons: \( R \rightarrow SH \) and \( A \rightarrow ZH \), where \( R \) is a CP-even boson, \( A \) is a CP-odd boson, \( H \) is a CP-even boson, and \( S \) is considered to decay into invisible particles that are candidates for dark matter. In these processes, \( S \rightarrow \text{invisible} \) and \( H \rightarrow ZZ \). The \( Z \) boson associated with the heavy scalar boson \( H \) decays into all decay channels of the \( Z \) boson. The mass range under consideration is 390–1300 (320–1300) GeV for the \( R \) (\( A \)) boson and 220–1000 GeV for the \( H \) boson. No significant deviation from the Standard Model backgrounds is observed. The results are interpreted as upper limits at a 95% confidence level on the cross-section times the branching ratio of the heavy resonances. |
|---|