Measurement of the $t\bar{t}Z$ and $t\bar{t}W$ production cross sections in multilepton final states using 3.2 fb${}^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector

Abstract

A measurement of the $t\bar{t}Z$ and $t\bar{t}W$ 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 $\sqrt{s}=13$ 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 ${\sigma }_{t\bar{t}Z}=0.9\pm 0.3$ pb and ${\sigma }_{t\bar{t}W}=1.5\pm 0.8$ pb, in agreement with the Standard Model predictions.

25 pages, plus author list - 42 pages in total, 8 figures, 5 tables. Published in Eur. Phys. J. C. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-22/

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Cited by in corpus (14)

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• Combined NLO EW and QCD corrections to off-shell $\text{t}\overline{\text{t}}\text{W}$ production at the LHC
• Modeling uncertainties of $t\bar{t}{W}^{\pm }$ multilepton signatures
• Soft-gluon corrections in $t\bar{t}W$ production
• Hadronic production of top-quark pairs in association with a pair of leptons in the POWHEG BOX framework
• Climbing to the Top of the ATLAS 13 TeV data
• Top quark physics in the Large Hadron Collider era
• Soft gluon resummation for the associated production of a top quark pair with a W boson at the LHC
• Searches for new interactions within the SMEFT framework at present and future colliders
• Top pair production in association with a vector gauge boson in ATLAS
• Top quark properties measurements at the LHC
• Top-quark pair production in association with a $Z$ boson in the 4$\ell$ channel with the ATLAS experiment
• ttH, ttZ and ttW measurements at LHC and top quark compositeness