@misc{10481/72383,
year = {2021},
month = {11},
url = {http://hdl.handle.net/10481/72383},
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, Argentina},
organization = {YerPhI, Armenia},
organization = {ARC, Australia},
organization = {BMWFW y FWF, Austria},
organization = {ANAS, Azerbaiyán},
organization = {SSTC, Bielorrusia},
organization = {CNPq y
FAPESP, Brasil},
organization = {NSERC, NRC y CFI, Canadá},
organization = {CERN; ANID, Chile},
organization = {CAS, MOST y
NSFC, China},
organization = {Minciencias, Colombia},
organization = {MSMT CR, MPO CR y VSC CR, República Checa},
organization = {DNRF y DNSRC, Dinamarca},
organization = {IN2P3-CNRS y CEA-DRF/IRFU, Francia},
organization = {SRNSFG,
Georgia},
organization = {BMBF, HGF y MPG, Alemania},
organization = {GSRI, Grecia},
organization = {RGC y la RAE de Hong Kong,
China},
organization = {ISF y Benoziyo Center, Israel},
organization = {INFN, Italia},
organization = {MEXT y JSPS, Japón},
organization = {CNRST,
Marruecos},
organization = {NWO, Países Bajos},
organization = {RCN, Noruega},
organization = {MNiSW y NCN, Polonia},
organization = {FCT, Portugal},
organization = {MNE/IFA, Rumania},
organization = {JINR},
organization = {MES de Rusia y NRC KI, Federación de Rusia},
organization = {MESTD, Serbia},
organization = {MSSR, Eslovaquia},
organization = {ARRS y MIZŠ, Eslovenia},
organization = {DSI/NRF, Sudáfrica},
organization = {MICINN, España},
organization = {SRC y Fundación Wallenberg, Suecia},
organization = {SERI, SNSF y cantones de Berna y Ginebra,
Suiza},
organization = {MOST, Taiwán},
organization = {TAEK, Turquía},
organization = {STFC, Reino Unido},
organization = {DOE y NSF,
Estados Unidos de América},
organization = {BCKDF, CANARIE, Compute Canada y CRC, Canadá},
organization = {Inversiones
d'Avenir Labex, Investissements d'Avenir Idex y ANR, Francia},
organization = {DFG y AvH Foundation, Alemania},
organization = {Programas Herakleitos, Thales y Aristeia cofinanciados por la UE-FSE
y el NSRF griego, Grecia;},
organization = {BSF-NSF y GIF, Israel},
organization = {Mecanismo Financiero de Noruega
2014-2021, Noruega},
organization = {Fundación Bancaria La Caixa, PROGRAMA CERCA Generalitat de
Catalunya y los Programas PROMETEO y GenT de la Generalitat Valenciana, España},
organization = {COSTE, ERC, FEDER, Acciones Horizonte 2020 y Marie Skłodowska-Curie, Unión Europea},
organization = {Göran
Gustafssons Stiftelse, Suecia},
organization = {The Royal Society y Leverhulme Trust, Reino Unido},
publisher = {Springer},
keywords = {Hadron-Hadron scattering (experiments)},
keywords = {Top physics},
title = {Measurement of the tt¯tt¯ production cross section in pp collisions at √s = 13 TeV with the ATLAS detector},
doi = {10.1007/JHEP11(2021)118},
author = {Atlas Collaboration and Aguilar Saavedra, Juan Antonio and Rodríguez Chala, Mikael},
}