Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/132811
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Type: | Journal article |
Title: | Measurement of the production cross-section of a single top quark in association with a Z boson in proton–proton collisions at 13 TeV with the ATLAS detector |
Author: | Aaboud, M. Aad, G. Abbott, B. Abdinov, O. Abeloos, B. Abidi, S. AbouZeid, O. Abraham, N. Abramowicz, H. Abreu, H. Abreu, R. Abulaiti, Y. Acharya, B. Adachi, S. Adamczyk, L. Adelman, J. Adersberger, M. Adye, T. Affolder, A. Afik, Y. et al. |
Citation: | Physics Letters B: Nuclear Physics and Particle Physics, 2018; 780:557-577 |
Publisher: | Elsevier |
Issue Date: | 2018 |
ISSN: | 0370-2693 1873-2445 |
Statement of Responsibility: | M. Aaboud … D. Duvnjak … P. Jackson … A. Petridis … H. Potti … M.J. White … et al. [The ATLAS Collaboration] |
Abstract: | The production of a top quark in association with a Z boson is investigated. The proton–proton collision data collected by the ATLAS experiment at the LHC in 2015 and 2016 at a centre-of-mass energy of √s = 13 TeV are used, corresponding to an integrated luminosity of 36.1 fb⁻¹. Events containing three identified leptons (electrons and/or muons) and two jets, one of which is identified as a b-quark jet are selected. The major backgrounds are diboson, t¯tand Z + jets production. A neural network is used to improve the background rejection and extract the signal. The resulting significance is 4.2σ in the data and the expected significance is 5.4σ. The measured cross-section for tZq production is 600 ±170 (stat.)±140 (syst.)fb. |
Rights: | © 2018 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP³. |
DOI: | 10.1016/j.physletb.2018.03.023 |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1016/j.physletb.2018.03.023 |
Appears in Collections: | Physics publications |
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hdl_132811.pdf | Published Version | 1.03 MB | Adobe PDF | View/Open |
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