Rimoldi, Marco; Mullier, Geoffrey; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Meloni, Federico; Beck, Hans Peter; Ereditato, Antonio (2018). 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. Physics letters. B, 780, pp. 557-577. Elsevier 10.1016/j.physletb.2018.03.023
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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 TeVare 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, tt̅ and 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.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Haug, Sigve, Weber, Michele, Beck, Hans Peter |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0370-2693 |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
BORIS Import LHEP |
Date Deposited: |
27 Jun 2019 14:34 |
Last Modified: |
05 Dec 2022 15:27 |
Publisher DOI: |
10.1016/j.physletb.2018.03.023 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt |
BORIS DOI: |
10.7892/boris.129105 |
URI: |
https://boris.unibe.ch/id/eprint/129105 |
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