# 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.
Type de document :
Article dans une revue
European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2017, 77, pp.40. 〈10.1140/epjc/s10052-016-4574-y〉

http://hal.in2p3.fr/in2p3-01361813
Contributeur : Claudine Bombar <>
Soumis le : mercredi 7 septembre 2016 - 15:40:17
Dernière modification le : lundi 9 avril 2018 - 12:22:08

### Citation

M. Aaboud, Z. Barnovska-Blenessy, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. 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. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2017, 77, pp.40. 〈10.1140/epjc/s10052-016-4574-y〉. 〈in2p3-01361813〉

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