Measurement of the production cross-section of a single top quark in association with a Zboson in proton–proton collisions at 13TeV with the ATLAS detector Aaboud, M. Aguilar Saavedra, Juan Antonio Atlas Collaboration Proton–proton collisions The production of a top quark in association with a Zboson is investigated. The proton–proton collision data collected by the ATLAS experiment at the LHC in 2015 and 2016 at a centre-of-mass energy of √s=13 TeVare used, corresponding to an integrated luminosity of 36.1 fb−1. Events containing three identified leptons (electrons and/or muons) and two jets, one of which is identified as a b-quark jet are selected. The major backgrounds are diboson, t¯tand Z+jetsproduction. A neural network is used to improve the background rejection and extract the signal. The resulting significance is 4.2σin the data and the expected significance is 5.4σ. The measured cross-section for tZqproduction is 600 ±170 (stat.)±140 (syst.)fb. 2019-05-07T07:47:05Z 2019-05-07T07:47:05Z 2018-03-14 info:eu-repo/semantics/article Aaboud, M.; Aguilar-Saavedra, Juan Antonio; Atlas Collaboration. Measurement of the production cross-section of a single top quark in association with a Zboson in proton–proton collisions at 13TeV with the ATLAS detector. Physics Letters B 780 (2018) 557–577 [https://doi.org/10.1016/j.physletb.2018.03.023] http://hdl.handle.net/10481/55645 10.1016/j.physletb.2018.03.023 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España Elsevier B. V.