Aaboud, M.Albert, JustinDavid, ClaireElliot, Alison A.Fincke-Keeler, J.Hamano, KenjiHill, Ewan ChinKeeler, RichardKowalewski, RobertKuwertz, E. S.Kwan, TonyLeBlanc, Matthew EdgarLefebvre, MichelMcPherson, Robert A.Pearce, James D.Seuster, RolfSobie, Randall J.Trovatelli, M.Venturi, M.et al.ATLAS Collaboration2020-01-202020-01-2020172017Aaboud, M.; Aad, G.; Abbott, B.; Abdallah, O.; Abdinov, O.; Abeloos, B.; Aben, R. … & Zwalinski, L. (2017). Measurement of the tt¯Z and tt¯W production cross sections in multilepton final states using 3.2 fb−1 of pp collisions at √s= 13 TeV with the ATLAS detector. The European Physical Journal C, 77(1), article 40. DOI: 10.1140/epjc/s10052-016-4574-yhttps://doi.org/10.1140/epjc/s10052-016-4574-yhttp://hdl.handle.net/1828/11499A measurement of the tt¯Z and tt¯W production cross sections in final states with either two same-charge muons, or three or four leptons (electrons or muons) is presented. The analysis uses a data sample of proton–proton collisions at s√=13 TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015, corresponding to a total integrated luminosity of 3.2 fb−1. The inclusive cross sections are extracted using likelihood fits to signal and control regions, resulting in σtt¯Z=0.9±0.3 pb and σtt¯W=1.5±0.8 pb, in agreement with the Standard Model predictions.enArticleDepartment of Physics and Astronomy