Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/123497
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Type: Journal article
Title: Measurement of the tt‾Z and tt‾W cross sections in proton-proton collisions at √s = 13 TeV with the ATLAS detector
Other Titles: Measurement of the t(t)over-barZ and t(t)over-barW cross sections in proton-proton collisions at root s=13 TeV with the ATLAS detector
Author: Aaboud, M.
Aad, G.
Abbott, B.
Abbott, D.
Abdinov, O.
Abeloos, B.
Abhayasinghe, D.
Abidi, S.
AbouZeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Acharya, B.
Adachi, S.
Adam, L.
Adamczyk, L.
Adamek, L.
Adelman, J.
Adersberger, M.
et al.
Citation: Physical Review D, 2019; 99(7):072009-1-072009-38
Publisher: American Physical Society
Issue Date: 2019
ISSN: 2470-0010
2470-0029
Statement of
Responsibility: 
M. Aaboud ... D. Duvnjak ... P. Jackson ... J.L. Oliver ... A. Petridis ... A. Qureshi ... A.S. Sharma ... M.J. White ... et a. [The ATLAS Collaboration]
Abstract: A measurement of the associated production of a top-quark pair (t¯t) with a vector boson (W, Z) in proton-proton collisions at a center-of-mass energy of 13 TeV is presented, using 36.1  fb−1 of integrated luminosity collected by the ATLAS detector at the Large Hadron Collider. Events are selected in channels with two same- or opposite-sign leptons (electrons or muons), three leptons or four leptons, and each channel is further divided into multiple regions to maximize the sensitivity of the measurement. The t¯tZ and t¯tW production cross sections are simultaneously measured using a combined fit to all regions. The best-fit values of the production cross sections are σt¯tZ=0.95±0.08stat±0.10syst  pb and σt¯tW=0.87±0.13stat±0.14syst  pb in agreement with the Standard Model predictions. The measurement of the t¯tZ cross section is used to set constraints on effective field theory operators which modify the t¯tZ vertex.
Rights: © 2019 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.
RMID: 0030120978
DOI: 10.1103/PhysRevD.99.072009
Appears in Collections:Physics publications

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