@misc{10481/64419, year = {2020}, month = {7}, url = {http://hdl.handle.net/10481/64419}, abstract = {Single 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 tt¯Z 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 mℓ+ℓ− > 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction.}, organization = {ANPCyT}, organization = {YerPhI, Armenia}, organization = {Australian Research Council}, organization = {BMWFW, Austria}, organization = {Austrian Science Fund (FWF)}, organization = {Azerbaijan National Academy of Sciences (ANAS)}, organization = {SSTC, Belarus}, organization = {National Council for Scientific and Technological Development (CNPq)}, organization = {Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)}, organization = {Natural Sciences and Engineering Research Council of Canada}, organization = {NRC, Canada}, organization = {Canada Foundation for Innovation}, organization = {CERN}, organization = {Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)}, organization = {Chinese Academy of Sciences}, organization = {Ministry of Science and Technology, China}, organization = {National Natural Science Foundation of China (NSFC)}, organization = {Departamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias}, organization = {Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government}, organization = {DNRF, Denmark}, organization = {Danish Natural Science Research Council}, organization = {Centre National de la Recherche Scientifique (CNRS)}, organization = {CEA-DRF/IRFU, France}, organization = {SRNSFG, Georgia}, organization = {Federal Ministry of Education & Research (BMBF)}, organization = {HGF, Germany}, organization = {Max Planck Society}, organization = {Greek Ministry of Development-GSRT}, organization = {RGC, China}, organization = {Hong Kong SAR, China}, organization = {Israel Science Foundation}, organization = {Benoziyo Center, Israel}, organization = {Istituto Nazionale di Fisica Nucleare (INFN)}, organization = {Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion Science}, organization = {CNRST, Morocco}, organization = {Netherlands Organization for Scientific Research (NWO) Netherlands Government}, organization = {RCN, Norway}, organization = {Ministry of Science and Higher Education, Poland}, organization = {NCN, Poland}, organization = {Portuguese Foundation for Science and Technology}, organization = {MNE/IFA, Romania}, organization = {MES of Russia, Russia Federation}, organization = {NRC KI, Russia Federation}, organization = {JINR}, organization = {MESTD, Serbia}, organization = {MSSR, Slovakia}, organization = {Slovenian Research Agency - Slovenia}, organization = {MIZS, Slovenia}, organization = {DST/NRF, South Africa}, organization = {MINECO, Spain}, organization = {SRC, Sweden}, organization = {Wallenberg Foundation, Sweden}, organization = {SERI, Switzerland}, organization = {Swiss National Science Foundation (SNSF)}, organization = {Canton of Bern, Switzerland}, organization = {Canton of Geneva, Switzerland}, organization = {Ministry of Science and Technology, Taiwan}, organization = {Ministry of Energy & Natural Resources - Turkey}, organization = {Science & Technology Facilities Council (STFC)}, organization = {United States Department of Energy (DOE)}, organization = {National Science Foundation (NSF)}, organization = {BCKDF, Canada}, organization = {CANARIE, Canada}, organization = {Compute Canada, Canada}, organization = {CRC, Canada}, organization = {European Union (EU) European Research Council (ERC)}, organization = {Horizon 2020, European Union}, organization = {COST, European Union}, organization = {French National Research Agency (ANR)}, organization = {German Research Foundation (DFG)}, organization = {Alexander von Humboldt Foundation}, organization = {Herakleitos programme - EU-ESF, Greece}, organization = {Thales programme - EU-ESF, Greece}, organization = {Aristeia programme - EU-ESF, Greece}, organization = {Greek NSRF, Greece}, organization = {BSF-NSF, Israel}, organization = {German-Israeli Foundation for Scientific Research and Development}, organization = {CERCA Programme Generalitat de Catalunya, Spain}, organization = {PROMETEO Programme Generalitat Valenciana, Spain}, organization = {Goran Gustafssons Stiftelse, Sweden}, organization = {Royal Society of London}, organization = {Leverhulme Trust}, publisher = {Springer Nature}, keywords = {Hadron-Hadron scattering (experiments)}, title = {Observation of the associated production of a top quark and a Z boson in pp collisions at p s = 13 TeV with the ATLAS detector}, doi = {10.1007/JHEP07(2020)124}, author = {Aad, G. and Aguilar Saavedra, Juan Antonio and Atlas Collaboration}, }