Inclusive and differential cross-sections for dilepton t¯t production measured in p s = 13 TeV pp collisions with the ATLAS detector

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URI: https://hdl.handle.net/10481/84339
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Author
Atlas Collaboration; Aguilar Saavedra, Juan Antonio; Rodríguez Chala, Mikael
Editorial
Springer Nature
Materia
Hadron-Hadron Scattering
 
Top Physics
 
Date
2023-07-17
Referencia bibliográfica
The ATLAS collaboration., Aad, G., Abbott, B. et al. Inclusive and differential cross-sections for dilepton tt¯ production measured in s√ = 13 TeV pp collisions with the ATLAS detector. J. High Energ. Phys. 2023, 141 (2023). [https://doi.org/10.1007/JHEP07(2023)141]
Sponsorship
CEA-DRF; Cantons of Bern and Geneva; DNSRC; EU-ESF; GenT Programmes Generalitat Valenciana, Spain; La Caixa Banking Foundation; MIZŠ; MNE; Norwegian Financial Mechanism; PROMETEO; RGC; UNCE; Wallenberg Foundation; National Science Foundation; U.S. Department of Energy; Alexander von Humboldt-Stiftung; CRC Health Group; Canarie; H2020 Marie Skłodowska-Curie Actions; Multiple Sclerosis Scientific Research Foundation; CERN; Compute Canada; Göran Gustafssons Stiftelser; Natural Sciences and Engineering Research Council of Canada; National Research Council Canada; Canada Foundation for Innovation; Science and Technology Facilities Council; Leverhulme Trust; European Research Council; European Cooperation in Science and Technology; Australian Research Council; National Stroke Foundation; Neurosurgical Research Foundation; Helmholtz-Gemeinschaft; Minerva Foundation; Deutsche Forschungsgemeinschaft; Agence Nationale de la Recherche; Japan Society for the Promotion of Science; Ministry of Education, Culture, Sports, Science and Technology; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung; Danmarks Grundforskningsfond; Fundação de Amparo à Pesquisa do Estado de São Paulo; National Natural Science Foundation of China; Ministerstvo Školství, Mládeže a Tělovýchovy; Fundação para a Ciência e a Tecnologia; Bundesministerium für Bildung und Forschung; Chinese Academy of Sciences; Austrian Science Fund; Austrian Science Fund; Ministry of Science and Technology of the People's Republic of China; Agencia Nacional de Promoción Científica y Tecnológica; Nederlandse Organisatie voor Wetenschappelijk Onderzoek; Bundesministerium für Wissenschaft, Forschung und Wirtschaft; Conselho Nacional de Desenvolvimento Científico e Tecnológico; Nella and Leon Benoziyo Center for Neurological Diseases, Weizmann Institute of Science; Israel Science Foundation; Instituto Nazionale di Fisica Nucleare; Narodowe Centrum Nauki; Javna Agencija za Raziskovalno Dejavnost RS; Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja; Ministerio de Ciencia e Innovación; Centre National pour la Recherche Scientifique et Technique; Staatssekretariat für Bildung, Forschung und Innovation; Horizon 2020; British Columbia Knowledge Development Fund; European Regional Development Fund; Defence Science Institute; Narodowa Agencja Wymiany Akademickiej; Institutul de Fizică Atomică; Agencia Nacional de Investigación y Desarrollo; Royal Society of South Australia; Irish Rugby Football Union
Abstract
Differential and double-differential distributions of kinematic variables of leptons from decays of top-quark pairs (tt¯ ) are measured using the full LHC Run 2 data sample collected with the ATLAS detector. The data were collected at a pp collision energy of s√ = 13 TeV and correspond to an integrated luminosity of 140 fb−1. The measurements use events containing an oppositely charged eμ pair and b-tagged jets. The results are compared with predictions from several Monte Carlo generators. While no prediction is found to be consistent with all distributions, a better agreement with measurements of the lepton pT distributions is obtained by reweighting the tt¯ sample so as to reproduce the top-quark pT distribution from an NNLO calculation. The inclusive top-quark pair production cross-section is measured as well, both in a fiducial region and in the full phase-space. The total inclusive cross-section is found to be σtt¯=829±1 (stat)±13 (syst)±8 (lumi)±2 (beam) pb, where the uncertainties are due to statistics, systematic effects, the integrated luminosity and the beam energy. This is in excellent agreement with the theoretical expectation.
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Atribución 4.0 Internacional
Except where otherwise noted, this item's license is described as Atribución 4.0 Internacional