Title
Search for four-top-quark production in the single-lepton and opposite-sign dilepton final states in pp collisions at s =13 TeV with the ATLAS detector
Date Issued
01 March 2019
Access level
open access
Resource Type
journal article
Author(s)
Aaboud M.
Aad G.
Abbott B.
Abdinov O.
Abeloos B.
Abhayasinghe D.K.
Abidi S.H.
Abouzeid O.S.
Abraham N.L.
Abramowicz H.
Abreu H.
Abulaiti Y.
Acharya B.S.
Adachi S.
Adamczyk L.
Adelman J.
Adersberger M.
Adiguzel A.
Adye T.
Affolder A.A.
Afik Y.
Agheorghiesei C.
Aguilar-Saavedra J.A.
Ahmadov F.
Aielli G.
Akatsuka S.
Åkesson T.P.A.
Akilli E.
Akimov A.V.
Alberghi G.L.
Albert J.
Albicocco P.
Alconada Verzini M.J.
Alderweireldt S.
Aleksa M.
Aleksandrov I.N.
Alexa C.
Alexopoulos T.
Alhroob M.
Ali B.
Alimonti G.
Alison J.
Alkire S.P.
Allaire C.
Allbrooke B.M.M.
Allen B.W.
Allport P.P.
Aloisio A.
Alonso A.
Alonso F.
Alpigiani C.
Alshehri A.A.
Alstaty M.I.
Alvarez Gonzalez B.
Álvarez Piqueras D.
Alviggi M.G.
Amadio B.T.
Amaral Coutinho Y.
Ambroz L.
Amelung C.
Amidei D.
Amor Dos Santos S.P.
Amoroso S.
Amrouche C.S.
Anastopoulos C.
Ancu L.S.
Andari N.
Andeen T.
Anders C.F.
Anders J.K.
Anderson K.J.
Andreazza A.
Andrei V.
Anelli C.R.
Angelidakis S.
Angelozzi I.
Angerami A.
Anisenkov A.V.
Annovi A.
Antel C.
Anthony M.T.
Antonelli M.
Antrim D.J.A.
Anulli F.
Aoki M.
Aparisi Pozo J.A.
Aperio Bella L.
Arabidze G.
Araque J.P.
Araujo Ferraz V.
Araujo Pereira R.
Arce A.T.H.
Ardell R.E.
Arduh F.A.
Arguin J.F.
Argyropoulos S.
Armbruster A.J.
Armitage L.J.
Armstrong A.
Arnaez O.
Publisher(s)
American Physical Society
Abstract
A search for four-top-quark production, tttt, is presented. It is based on proton-proton collision data with a center-of-mass energy s=13 TeV collected by the ATLAS detector at the Large Hadron Collider during the years 2015 and 2016, corresponding to an integrated luminosity of 36.1 fb-1. Data are analyzed in both the single-lepton and opposite-sign dilepton channels, characterized by the presence of one or two isolated electrons or muons with high-transverse momentum and multiple jets. A data-driven method is used to estimate the dominant background from top-quark pair production in association with jets. No significant excess above the Standard Model expectation is observed. The result is combined with the previous same-sign dilepton and multilepton searches carried out by the ATLAS Collaboration and an observed (expected) upper limit of 5.3 (2.1) times the four-top-quark Standard Model cross section is obtained at 95% confidence level. Additionally, an upper limit on the anomalous four-top-quark production cross section is set in the context of an effective field theory model.
Volume
99
Issue
5
Language
English
OCDE Knowledge area
Física de plasmas y fluídos
Subjects
Scopus EID
2-s2.0-85064385824
Source
Physical Review D
ISSN of the container
24700010
Sponsor(s)
We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZŠ, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE, CRC and Compute Canada, Canada; COST, ERC, ERDF, Horizon 2020, and Marie Skłodowska-Curie Actions, European Union; Investissements d’ Avenir Labex and Idex, ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and GIF, Israel; CERCA Programme Generalitat de Catalunya, Spain; The Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in Ref.
Sources of information:
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