Çetin, Serkant Ali2020-11-102020-11-102020-07-201029-8479https://hdl.handle.net/11411/2573https://doi.org/10.1007/JHEP07(2020)12446 pagesSingle top-quark production in association with a Z boson, where the Z boson decays to a pair of charged leptons, is measured in the trilepton channel. The proton-proton collision data collected by the ATLAS experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 139 fb(-1). Events containing three isolated charged leptons (electrons or muons) and two or three jets, one of which is identified as containing a b-hadron, are selected. The main backgrounds are from t (t) over barZ and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for tl(+)l(-) q production, including non-resonant dilepton pairs with m(l+l-) > 30 GeV, is 97 +/- 13 (stat.) +/- 7 (syst.) fb, consistent with the Standard Model prediction.eninfo:eu-repo/semantics/openAccessHadron-Hadron scattering (experiments)Article2-s2.0-8508839490510.1007/JHEP07(2020)124Q1WOS:000565307900001