Aaboud, M.Aad, G.Abbott, B.Abdallah, J.Abdinov, O.Abeloos, B.Aben, R.Izen, Joseph M.Leyton, MichaelMeirose, BernhardNamasivayam, HarisankarReeves, KendallATLAS Collaboration2018-05-152018-05-152017-01-201434-6044http://hdl.handle.net/10735.1/5708A measurement of the tt̅ Z and tt̅ 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 √s̅ = 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 σ_{tt̅ Z} = 0.9 ± 0.3 pb and σ_{tt̅ W} = 1.5 ± 0.8 pb, in agreement with the Standard Model predictions.enCC BY 4.0 (Attribution)©2017 CERN for the benefit of the ATLAS collaboration.http://creativecommons.org/licenses/by/4.0/W bosonsZ bosonsLarge Hadron Collider (France and Switzerland)Standard model (Nuclear physics)MuonsLeptons (Nuclear physics)Proton-proton interactionsLuminescencearticleAaboud, M., G. Aad, B. Abbott, J. Abdallah, et al. 2017. "Measurement of the tt̅ Z and tt̅ W production cross sections in multilepton final states using 3.2 fb⁻¹ of pp collisions at √s = 13 TeV with the ATLAS detector." European Physical Journal C 77(1), doi:10.1140/epjc/s10052-016-4574-y771