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https://hdl.handle.net/10316/107215
Título: | Search for high-mass dilepton resonances using 139 fb−1 of pp collision data collected at √s=13 TeV with the ATLAS detector | Autor: | Veloso, F. Wolters, H. ATLAS Collaboration |
Data: | 2019 | Editora: | Elsevier | Título da revista, periódico, livro ou evento: | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Volume: | 796 | Resumo: | A search for high-mass dielectron and dimuon resonances in the mass range of 250GeVto 6TeVis presented. The data were recorded by the ATLAS experiment in proton–proton collisions at a centre-of-mass energy of √s=13TeVduring Run 2 of the Large Hadron Collider and correspond to an integrated luminosity of 139fb−1. A functional form is fitted to the dilepton invariant-mass distribution to model the contribution from background processes, and a generic signal shape is used to determine the significance of observed deviations from this background estimate. No significant deviation is observed and upper limits are placed at the 95% confidence level on the fiducial cross-section times branching ratio for various resonance width hypotheses. The derived limits are shown to be applicable to spin-0, spin-1 and spin-2 signal hypotheses. For a set of benchmark models, the limits are converted into lower limits on the resonance mass and reach 4.5TeVfor the E6-motivated Z ψboson. Also presented are limits on Heavy Vector Triplet model couplings. | URI: | https://hdl.handle.net/10316/107215 | DOI: | 10.1016/j.physletb.2019.07.016 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Física - Artigos em Revistas Internacionais |
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Ficheiro | Descrição | Tamanho | Formato | |
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Search for high-mass dilepton resonances using 139 fb−1 of pp collision data collected at √s=13 TeV with the ATLAS detector.pdf | 1.89 MB | Adobe PDF | Ver/Abrir |
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