Measurement of single top-quark production in association with a <i>W</i> boson in the single-lepton channel at √s=8 TeV with the ATLAS detector



Aad, G, Abbott, B, Abbott, DC, Abud, A Abed, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2926 more authors) (2021) Measurement of single top-quark production in association with a <i>W</i> boson in the single-lepton channel at √s=8 TeV with the ATLAS detector. EUROPEAN PHYSICAL JOURNAL C, 81 (8). 720-.

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Abstract

The production cross-section of a top quark in association with a $W$ boson is measured using proton-proton collisions at $\sqrt{s} = 8$ TeV. The dataset corresponds to an integrated luminosity of 20.2 fb$^{-1}$, and was collected in 2012 by the ATLAS detector at the Large Hadron Collider at CERN. The analysis is performed in the single-lepton channel. Events are selected by requiring one isolated lepton (electron or muon) and at least three jets. A neural network is trained to separate the $tW$ signal from the dominant $t\bar{t}$ background. The cross-section is extracted from a binned profile maximum-likelihood fit to a two-dimensional discriminant built from the neural-network output and the invariant mass of the hadronically decaying $W$ boson. The measured cross-section is $\sigma_{tW} = 26 \pm 7$ pb, in good agreement with the Standard Model expectation.

Item Type: Article
Additional Information: 42 pages in total, author list starting page 26, 8 figures, 3 tables, published in Eur. Phys. J C 81 (2021) 720. All figures including auxiliary figures are available at : http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2016-06
Uncontrolled Keywords: hep-ex, hep-ex
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 26 Aug 2021 07:44
Last Modified: 14 Oct 2023 13:33
DOI: 10.1140/epjc/s10052-021-09371-7
Open Access URL: https://link.springer.com/article/10.1140%2Fepjc%2...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3134800