| dc.contributor.author | Hayrapetyan, A. | |
| dc.contributor.author | Blanco Fernández, Sergio | |
| dc.contributor.author | Brochero Cifuentes, Javier Andrés | |
| dc.contributor.author | Cabrillo Bartolomé, José Iban | |
| dc.contributor.author | Calderón Tazón, Alicia | |
| dc.contributor.author | Duarte Campderros, Jorge | |
| dc.contributor.author | Fernández García, Marcos | |
| dc.contributor.author | Fernández Madrazo, Celia | |
| dc.contributor.author | Gómez Gramuglio, Gervasio | |
| dc.contributor.author | Lasaosa García, Clara | |
| dc.contributor.author | Martínez Rivero, Celso | |
| dc.contributor.author | Martínez Ruiz del Árbol, Pablo | |
| dc.contributor.author | Matorras Weinig, Francisco | |
| dc.contributor.author | Matorras Cuevas, Pablo | |
| dc.contributor.author | Navarrete Ramos, Efrén | |
| dc.contributor.author | Piedra Gómez, Jonatan | |
| dc.contributor.author | Prieëls, Cedric | |
| dc.contributor.author | Scodellaro, Luca | |
| dc.contributor.author | Vila Álvarez, Iván | |
| dc.contributor.author | Vizán García, Jesús Manuel | |
| dc.contributor.other | Universidad de Cantabria | es_ES |
| dc.date.accessioned | 2024-05-15T17:33:46Z | |
| dc.date.available | 2024-05-15T17:33:46Z | |
| dc.date.issued | 2023-12 | |
| dc.identifier.issn | 0370-2693 | |
| dc.identifier.issn | 1873-2445 | |
| dc.identifier.uri | https://hdl.handle.net/10902/32854 | |
| dc.description.abstract | The observation of the production of four top quarks in proton-proton collisions is reported, based on a data sample collected by the CMS experiment at a center-of-mass energy of 13 TeV in 2016–2018 at the CERN LHC and corresponding to an integrated luminosity of 138 fb−1. Events with two same-sign, three, or four charged leptons (electrons and muons) and additional jets are analyzed. Compared to previous results in these channels, updated identification techniques for charged leptons and jets originating from the hadronization of b quarks, as well as a revised multivariate analysis strategy to distinguish the signal process from the main backgrounds, lead to an improved expected signal significance of 4.9 standard deviations above the background-only hypothesis. Four top quark production is observed with a significance of 5.6 standard deviations, and its cross section is measured to be 17.7 +³.⁷ −₃.₅ (stat) +².³ −₁.₉ (syst) fb, in agreement with the available standard model predictions. | es_ES |
| dc.description.sponsorship | Individuals have received support from the Marie-Curie programme and the European Research Council and Horizon 2020 Grant, contract Nos. 675440, 724704, 752730, 758316, 765710, 824093, 884104, and COST Action CA16108 (European Union); the Leventis Foundation; the Alfred P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the F.R.S.-FNRS and FWO (Belgium) under the “Excellence of Science – EOS” – be.h project n. 30820817; the Beijing Municipal Science & Technology Commission, No. Z191100007219010; The Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Hellenic Foundation for Research and Innovation (HFRI), Project Number 2288 (Greece); the Deutsche Forschungsgemeinschaft (DFG), under Germany's Excellence Strategy – EXC 2121 “Quantum Universe” – 390833306, and under project number 400140256 - GRK2497; the Hungarian Academy of Sciences, the New National Excellence Program - ÚNKP, the NKFIH research grants K 124845, K 124850, K 128713, K 128786, K 129058, K 131991, K 133046, K 138136, K 143460, K 143477, 2020-2.2.1-ED-2021-00181, and TKP2021-NKTA-64 (Hungary); the Council of Science and Industrial Research, India; the Latvian Council of Science; the Ministry of Education and Science, project no. 2022/WK/14, and the National Science Center, contracts Opus 2021/41/B/ST2/01369 and 2021/43/B/ST2/01552 (Poland); the Fundação para a Ciência e a Tecnologia, grant CEECIND/01334/2018 (Portugal); the National Priorities Research Program by Qatar National Research Fund; MCIN/AEI/10.13039/501100011033, ERDF “a way of making Europe”, and the Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu, grant MDM-2017-0765 and Programa Severo Ochoa del Principado de Asturias (Spain); the Chulalongkorn Academic into Its 2nd Century Project Advancement Project, and the National Science, Research and Innovation Fund via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation, grant B05F650021 (Thailand); the Kavli Foundation; the Nvidia Corporation; the SuperMicro Corporation; the Welch Foundation, contract C-1845; and the Weston Havens Foundation (USA). | es_ES |
| dc.format.extent | 32 p. | es_ES |
| dc.language.iso | eng | es_ES |
| dc.publisher | Elsevier | es_ES |
| dc.rights | © 2023 The Author(s). Published by Elsevier B.V. Funded by SCOAP³. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). | es_ES |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
| dc.source | Physics Letters B, 2023, 847, 138290 | es_ES |
| dc.subject.other | CMS | es_ES |
| dc.subject.other | Top quark | es_ES |
| dc.title | Observation of four top quark production in proton-proton collisions at √s= 13TeV | es_ES |
| dc.type | info:eu-repo/semantics/article | es_ES |
| dc.relation.publisherVersion | https://doi.org/10.1016/j.physletb.2023.138290 | es_ES |
| dc.rights.accessRights | openAccess | es_ES |
| dc.identifier.DOI | 10.1016/j.physletb.2023.138290 | |
| dc.type.version | publishedVersion | es_ES |
Excepto si se señala otra cosa, la licencia del ítem se describe como © 2023 The Author(s). Published by Elsevier B.V. Funded by SCOAP³. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
