@Article{ATLASCollaborationAaboud_etal2019,
author="ATLAS Collaboration (Aaboud, M. et al
and Alvarez Piqueras, D.
and Aparisi Pozo, J. A.
and Bailey, A. J.
and Barranco Navarro, L.
and Cabrera Urban, S.
and Castillo, F. L.
and Castillo Gimenez, V.
and Cerda Alberich, L.
and Costa, M. J.
and Escobar, C.
and Estrada Pastor, O.
and Ferrer, A.
and Fiorini, L.
and Fullana Torregrosa, E.
and Fuster, J.
and Garcia, C.
and Garcia Navarro, J. E.
and Gonzalez de la Hoz, S.
and Higon-Rodriguez, E.
and Jimenez Pena, J.
and Lacasta, C.
and Lozano Bahilo, J. J.
and Madaffari, D.
and Mamuzic, J.
and Marti-Garcia, S.
and Melini, D.
and Mi{\~A}{\textpm}ano, M.
and Mitsou, V. A.
and Rodriguez Bosca, S.
and Rodriguez Rodriguez, D.
and Ruiz-Martinez, A.
and Salt, J.
and Santra, A.
and Soldevila, U.
and Sanchez, J.
and Valero, A.
and Valls Ferrer, J. A.
and Vos, M.",
title="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",
journal="Physical Review D",
year="2019",
publisher="Amer Physical Soc",
volume="99",
number="5",
pages="052009--36pp",
abstract="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.",
optnote="WOS:000462909800001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3964), last updated on Fri, 12 Apr 2019 09:22:43 +0000",
issn="2470-0010",
doi="10.1103/PhysRevD.99.052009",
opturl="https://arxiv.org/abs/1811.02305",
opturl="https://doi.org/10.1103/PhysRevD.99.052009",
language="English"
}