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https://hdl.handle.net/10316/104870
Título: | Search for new phenomena in events with two opposite-charge leptons, jets and missing transverse momentum in pp collisions at √s = 13 TeV with the ATLAS detector | Autor: | Fiolhais, M. C. N. Gonçalo, R. Veloso, F. Wolters, H. ATLAS Collaboration |
Palavras-chave: | Hadron-Hadron scattering (experiments) | Data: | Abr-2021 | Editora: | Springer Nature | Título da revista, periódico, livro ou evento: | Journal of High Energy Physics | Volume: | 2021 | Número: | 4 | Resumo: | The results of a search for direct pair production of top squarks and for dark matter in events with two opposite-charge leptons (electrons or muons), jets and missing transverse momentum are reported, using 139 fb−1 of integrated luminosity from protonproton collisions at p s = 13TeV, collected by the ATLAS detector at the Large Hadron Collider during Run 2 (2015–2018). This search considers the pair production of top squarks and is sensitive across a wide range of mass differences between the top squark and the lightest neutralino. Additionally, spin-0 mediator dark-matter models are considered, in which the mediator is produced in association with a pair of top quarks. The mediator subsequently decays to a pair of dark-matter particles. No significant excess of events is observed above the Standard Model background, and limits are set at 95% confidence level. The results exclude top squark masses up to about 1TeV, and masses of the lightest neutralino up to about 500 GeV. Limits on dark-matter production are set for scalar (pseudoscalar) mediator masses up to about 250 (300) GeV. | URI: | https://hdl.handle.net/10316/104870 | DOI: | 10.1007/JHEP04(2021)165 | 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-new-phenomena-in-events-with-two-oppositecharge-leptons-jets-and-missing-transverse-momentum-in-pp-collisions-at-s--13-TeV-with-the-ATLAS-detectorJournal-of-High-Energy-Physics.pdf | 2.37 MB | Adobe PDF | Ver/Abrir |
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