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Measurement of the t ¯t Z and t ¯tW production cross sections in multilepton final states using 3.2 fb−1 of pp collisions at √ s = 13 TeV with the ATLAS detector

Aaboud, M; Aad, G; Abbott, B; Abdallah, J; Abdinov, O; Abeloos, B; Aben, R; ... Zwalinski, L; + view all (2017) Measurement of the t ¯t Z and t ¯tW 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) , Article 40. 10.1140/epjc/s10052-016-4574-y. Green open access

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Abstract

A measurement of the tt ¯ Z tt¯Z and tt ¯ W 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 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 σ tt ¯ Z =0.9±0.3 σtt¯Z=0.9±0.3 pb and σ tt ¯ W =1.5±0.8 σtt¯W=1.5±0.8 pb, in agreement with the Standard Model predictions.

Type: Article
Title: Measurement of the t ¯t Z and t ¯tW production cross sections in multilepton final states using 3.2 fb−1 of pp collisions at √ s = 13 TeV with the ATLAS detector
Open access status: An open access version is available from UCL Discovery
DOI: 10.1140/epjc/s10052-016-4574-y
Publisher version: http://dx.doi.org/10.1140/epjc/s10052-016-4574-y
Language: English
Additional information: Copyright © CERN for the benefit of the ATLAS collaboration 2017. Open Access: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery-pp.ucl.ac.uk/id/eprint/1523445
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