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

M Aaboud, G Aad, B. Abbott, O Abdinov, B Abeloos, Torsten Åkesson, Simona Bocchetta, LENE BRYNGEMARK, Caterina Doglioni, Anders Floderus, Vincent Hedberg, Göran Jarlskog, Else Lytken, Ulf Mjörnmark, Oxana Smirnova, Oleksandr Viazlo, ATLAS Collaboration

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Abstract

A measurement of the tt¯ Z and 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 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 σt t¯ Z= 0.9 ± 0.3 pb and σt t¯ W= 1.5 ± 0.8 pb, in agreement with the Standard Model predictions. © 2017, CERN for the benefit of the ATLAS collaboration.
Original languageEnglish
Article number40
JournalEuropean Physical Journal C
Volume77
Issue number1
DOIs
Publication statusPublished - 2017

Bibliographical note

Cited By :1

Export Date: 14 June 2017

Subject classification (UKÄ)

  • Subatomic Physics

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