Search for new phenomena in final states with two leptons and one or no b-tagged jets at √s = 13 TeV using the ATLAS detector
| Autor: | Aad, G., ATLAS Collaboration, Álvarez Estévez, Manuel, Barreiro Alonso, Fernando, Calvente López, Sergio, Camarero Muñoz, Daniel, Peso Malagón, José del, Glasman Kuguel, Claudia Beatriz, Príncipe Martín, Miguel Ángel, Terrón Cuadrado, Juan |
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| Přispěvatelé: | UAM. Departamento de Física Teórica |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Popis: | Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM A search for new phenomena is presented in final states with two leptons and one or no b-tagged jets. The event selection requires the two leptons to have opposite charge, the same flavor (electrons or muons), and a large invariant mass. The analysis is based on the full run-2 proton-proton collision dataset recorded at a center-of-mass energy of √s p = 13 TeV by the ATLAS experiment at the LHC, corresponding to an integrated luminosity of 139 fb−1. No significant deviation from the expected background is observed in the data. Inspired by the B-meson decay anomalies, a four-fermion contact interaction between two quarks (b, s) and two leptons (ee or μμ) is used as a benchmark signal model, which is characterized by the energy scale and coupling, Λ and g, respectively. Contact interactions with Λ / g* lower than 2.0 (2.4) TeV are excluded for electrons (muons) at the 95% confidence level, still far below the value that is favored by the B-meson decay anomalies. Model-independent limits are set as a function of the minimum dilepton invariant mass, which allow the results to be reinterpreted in various signal scenarios |
| Databáze: | OpenAIRE |
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