@misc{10481/72103,
year = {2021},
month = {11},
url = {http://hdl.handle.net/10481/72103},
abstract = {A measurement of four-top-quark production using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the Large Hadron Collider corresponding to an integrated luminosity of 139 fb(-1) is presented. Events are selected if they contain a single lepton (electron or muon) or an opposite-sign lepton pair, in association with multiple jets. The events are categorised according to the number of jets and how likely these are to contain b-hadrons. A multivariate technique is then used to discriminate between signal and background events. The measured four-top-quark production cross section is found to be 26(-15)(+17) fb, with a corresponding observed (expected) significance of 1.9 (1.0) standard deviations over the background-only hypothesis. The result is combined with the previous measurement performed by the ATLAS Collaboration in the multilepton final state. The combined four-top-quark production cross section is measured to be 24(-6)(+7) fb, with a corresponding observed (expected) signal significance of 4.7 (2.6) standard deviations over the background-only predictions. It is consistent within 2.0 standard deviations with the Standard Model expectation of 12.0 +/- 2.4 fb.},
organization = {ANPCyT},
organization = {YerPhI, Armenia},
organization = {Australian Research Council},
organization = {BMWFW, Austria},
organization = {Austrian Science Fund (FWF)},
organization = {Azerbaijan National Academy of Sciences (ANAS)},
organization = {SSTC, Belarus},
organization = {Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)},
organization = {Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)},
organization = {Natural Sciences and Engineering Research Council of Canada (NSERC)		
NRC, Canada		
Canada Foundation for Innovation},
organization = {CERN},
organization = {ANID, Chile},
organization = {Chinese Academy of Sciences		
Ministry of Science and Technology, China		
National Natural Science Foundation of China (NSFC)},
organization = {Minciencias, Colombia},
organization = {Ministry of Education, Youth & Sports - Czech Republic
Czech Republic Government},
organization = {DNRF, Denmark		
Danish Natural Science Research Council},
organization = {Centre National de la Recherche Scientifique (CNRS)		
CEA-DRF/IRFU, France},
organization = {SRNSFG, Georgia},
organization = {Federal Ministry of Education & Research (BMBF)},
organization = {HGF, Germany},
organization = {Max Planck Society},
organization = {GSRI, Greece},
organization = {RGC, China		
Hong Kong SAR, China},
organization = {Israel Science Foundation		
Benoziyo Center, Israel},
organization = {Istituto Nazionale di Fisica Nucleare (INFN)},
organization = {Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)		
Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)
Japan Society for the Promotion of Science},
organization = {CNRST, Morocco},
organization = {Netherlands Organization for Scientific Research (NWO)
Netherlands Government},
organization = {RCN, Norway},
organization = {Ministry of Science and Higher Education, Poland		
NCN, Poland},
organization = {Portuguese Foundation for Science and Technology
European Commission},
organization = {MNE/IFA, Romania},
organization = {JINR},
organization = {Russian Federation		
NRC KI, Russian Federation},
organization = {Ministry of Education, Science & Technological Development, Serbia},
organization = {MSSR, Slovakia},
organization = {Slovenian Research Agency - Slovenia		
MIZS, Slovenia},
organization = {DSI/NRF, South Africa},
organization = {Spanish Government},
organization = {SRC, Sweden},
organization = {SERI, Switzerland},
organization = {Swiss National Science Foundation (SNSF)		
Canton Geneva, Switzerland},
organization = {Ministry of Science and Technology, Taiwan},
organization = {Ministry of Energy & Natural Resources - Turkey},
organization = {UK Research & Innovation (UKRI)},
organization = {Science & Technology Facilities Council (STFC)},
organization = {United States Department of Energy (DOE)},
organization = {National Science Foundation (NSF)},
organization = {BCKDF, Canada		
CANARIE, Canada		
Compute Canada, Canada		
CRC, Canada},
organization = {COST, European Union		
European Research Council (ERC)		
ERDF, European Union		
Horizon 2020, European Union		
Marie Sklodowska-Curie Actions, European Union},
organization = {French National Research Agency (ANR)},
organization = {German Research Foundation (DFG)		
Alexander von Humboldt Foundation},
organization = {Herakleitos programme - EU-ESF, Greece		
Thales Group		
Aristeia programme - EU-ESF, Greece		
Greek NSRF, Greece},
organization = {BSF-NSF, Israel		
German-Israeli Foundation for Scientific Research and Development},
organization = {Norwegian Financial Mechanism 2014-2021, Norway},
organization = {La Caixa Banking Foundation, Spain		
CERCA Programme Generalitat de Catalunya, Spain		
PROMETEO Programme Generalitat Valenciana, Spain		
GenT Programme Generalitat Valenciana, Spain},
organization = {Goran Gustafssons Stiftelse, Sweden},
organization = {Royal Society of London},
organization = {Leverhulme Trust},
organization = {Wallenberg Foundation, Sweden},
organization = {Canton of Geneva, Switzerland},
publisher = {Springer},
keywords = {Hadron-Hadron scattering (experiments)},
keywords = {Top physics},
title = {Measurement of the t(t)over-bart(t)over-bar production cross section in pp collisions at root s=13 TeV with the ATLAS detector},
doi = {10.1007/JHEP11(2021)118},
author = {Aad, G. and Aguilar Saavedra, Juan Antonio and Rodríguez Chala, Mikael and Atlas Collaboration},
}