The European Physical Journal C > 2017 > 77 > 1 > 1-29
Measurement of the $${\varvec{t\bar{t}Z}}$$ t t ¯ Z and $${\varvec{t\bar{t}W}}$$ t t ¯ W production cross sections in multilepton final states using 3.2 fb $$^{-1}$$ - 1 of $$\varvec{pp}$$ p p collisions at $$\sqrt{s}$$ s = 13 TeV with the ATLAS detector
Source
Abstract
A measurement of the $$t\bar{t}Z$$ t t ¯ Z and $$t\bar{t}W$$ t 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 $$\sqrt{s} = 13$$ 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 $$^{-1}$$ - 1 . The inclusive cross sections are extracted using likelihood fits to signal and control regions, resulting in $$\sigma _{t\bar{t}Z} = 0.9 \pm 0.3$$ σ t t ¯ Z = 0.9 ± 0.3 pb and $$\sigma _{t\bar{t}W} = 1.5 \pm 0.8$$ σ t t ¯ W = 1.5 ± 0.8 pb, in agreement with the Standard Model predictions.
Identifiers
journal ISSN : | 1434-6044 |
journal e-ISSN : | 1434-6052 |
DOI | 10.1140/epjc/s10052-016-4574-y |