Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/3143
Title: Measurement of the t t Z and t t W cross sections in proton-proton collisions at s =13 TeV with the ATLAS detector
Authors: The ATLAS Collaboration
Sultansoy, Saleh
Keywords: Collisions 
jets 
proton–proton collisions
Issue Date: 2019
Publisher: American Physical Society
Source: ATLAS collaboration. (2019). Measurement of the t t¯ Z and t t¯ W cross sections in proton-proton collisions at s= 13 TeV with the ATLAS detector. Physical Review D, 99(7), 072009.
Abstract: A measurement of the associated production of a top-quark pair (tt) 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 ttZ and ttW production cross sections are simultaneously measured using a combined fit to all regions. The best-fit values of the production cross sections are ?ttZ=0.95±0.08stat±0.10syst pb and ?ttW=0.87±0.13stat±0.14syst pb in agreement with the Standard Model predictions. The measurement of the ttZ cross section is used to set constraints on effective field theory operators which modify the ttZ vertex. © 2019 CERN, for the ATLAS Collaboration.
URI: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.072009
https://hdl.handle.net/20.500.11851/3143
ISSN: 24700010
Appears in Collections:Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü / Department of Material Science & Nanotechnology Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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