Evidence for tttt production in the multilepton final state in proton-proton collisions at s=13 TeV with the ATLAS detector
- NázevTitle
- Evidence for tttt production in the multilepton final state in proton-proton collisions at s=13 TeV with the ATLAS detectorEvidence for tttt production in the multilepton final state in proton-proton collisions at s=13 TeV with the ATLAS detector
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- G. Aad, B. Abbott, D. C. Abbott, A. Abud, B. Ali, K. Augsten, B. Bergmann, M. Havránek, Z. Hubáček, M. Myška, R. Novotný, S. Pospíšil, K. Smolek, A. Sopczak, V. Vacek, P. Vokáč, V. Vrba, T. Billoud, V. Petousis
- DOIDOI
- 10.1140/epjc/s10052-020-08509-3
- Časopis / citaceJournal / citation
- European Physical Journal C. 2020, 80(11), ISSN 1434-6044.
- RokYear
- 2020
- JazykLanguage
- eng
- WoSWoS
- 000595710000001
- ScopusScopus
- 2-s2.0-85096516887
- RIVRIV
- RIV/68407700:21220/20:00346675!RIV21-MSM-21220___
- ProjektProject
- Centrum pokročilých aplikovaných přírodních vědCenter for advanced applied sciences; Získávání nových poznatků o mikrosvětě v infrastruktuře CERNAcquiring new pieces of knowledge about micro-world in CERN research infrastructure
AbstraktAbstract
A search is presented for four-top-quark production using an integrated luminosity of 139 fb-1 of proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be 24-6+7 fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 4.3 (2.4) standard deviations and provides evidence for this process.
A search is presented for four-top-quark production using an integrated luminosity of 139 fb-1 of proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be 24-6+7 fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 4.3 (2.4) standard deviations and provides evidence for this process.