%0 Journal Article
%T Search for four-top-quark production in the single-lepton and opposite-sign dilepton final states in pp collisions at root s=13 TeV with the ATLAS detector
%A ATLAS Collaboration (Aaboud, M. et al
%A Alvarez Piqueras, D.
%A Aparisi Pozo, J. A.
%A Bailey, A. J.
%A Barranco Navarro, L.
%A Cabrera Urban, S.
%A Castillo, F. L.
%A Castillo Gimenez, V.
%A Cerda Alberich, L.
%A Costa, M. J.
%A Escobar, C.
%A Estrada Pastor, O.
%A Ferrer, A.
%A Fiorini, L.
%A Fullana Torregrosa, E.
%A Fuster, J.
%A Garcia, C.
%A Garcia Navarro, J. E.
%A Gonzalez de la Hoz, S.
%A Higon-Rodriguez, E.
%A Jimenez Pena, J.
%A Lacasta, C.
%A Lozano Bahilo, J. J.
%A Madaffari, D.
%A Mamuzic, J.
%A Marti-Garcia, S.
%A Melini, D.
%A Miñano, M.
%A Mitsou, V. A.
%A Rodriguez Bosca, S.
%A Rodriguez Rodriguez, D.
%A Ruiz-Martinez, A.
%A Salt, J.
%A Santra, A.
%A Soldevila, U.
%A Sanchez, J.
%A Valero, A.
%A Valls Ferrer, J. A.
%A Vos, M.
%J Physical Review D
%D 2019
%V 99
%N 5
%I Amer Physical Soc
%@ 2470-0010
%G English
%F ATLASCollaborationAaboud_etal2019
%O WOS:000462909800001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3964), last updated on Fri, 12 Apr 2019 09:22:43 +0000
%X A search for four-top-quark production, t (t) over bart (t) over bar, is presented. It is based on proton-proton collision data with a center-of-mass energy root 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.
%R 10.1103/PhysRevD.99.052009
%U https://arxiv.org/abs/1811.02305
%U https://doi.org/10.1103/PhysRevD.99.052009
%P 052009-36pp