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. / The ATLAS Collaboration.

In: European Physical Journal C: Particles and Fields, Vol. 77, 40, 01.2017, p. 1-29.

Research output: Contribution to journalArticle

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  • The ATLAS Collaboration

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 σtt¯Z=0.9±0.3pb and σtt¯W=1.5±0.8pb, in agreement with the Standard Model predictions.
Original languageEnglish
Article number40
Pages (from-to)1-29
Number of pages29
JournalEuropean Physical Journal C: Particles and Fields
Volume77
Early online date20 Jan 2017
DOIs
Publication statusPublished - Jan 2017
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

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