Measurement of the cross-section for producing a <i>W</i> boson in association with a single top quark in <i>pp</i> collisions at √<i>s</i>=13 TeV with ATLS



Aaboud, M, Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B, Aben, R, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2851 more authors) (2018) Measurement of the cross-section for producing a <i>W</i> boson in association with a single top quark in <i>pp</i> collisions at √<i>s</i>=13 TeV with ATLS. JOURNAL OF HIGH ENERGY PHYSICS, 01 (1). 63-.

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Abstract

The inclusive cross-section for the associated production of a $W$ boson and top quark is measured using data from proton-proton collisions at $\sqrt{s}={13}$ TeV. The dataset corresponds to an integrated luminosity of 3.2 fb$^{-1}$, and was collected in 2015 by the ATLAS detector at the Large Hadron Collider at CERN. Events are selected requiring two opposite sign isolated leptons and at least one jet; they are separated into signal and control regions based on their jet multiplicity and the number of jets that are identified as containing $b$ hadrons. The $Wt$ signal is then separated from the $t\bar{t}$ background using boosted decision tree discriminants in two regions. The cross-section is extracted by fitting templates to the data distributions, and is measured to be $94 \pm 10$ (stat.)$^{+28}_{-22}$ (syst.) $\pm 2$ (lumi.) pb. The measurement is in agreement with the Standard Model prediction of $\sigma_{\mathrm{theory}} = 71.7 \pm 1.8\,(\mathrm{scale})\,\pm 3.4\,(\mathrm{PDF})\,\mathrm{pb}$.

Item Type: Article
Additional Information: 40 pages in total, author list starting page 24, 7 figures, 4 tables, published in JHEP, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-16/
Uncontrolled Keywords: Hadron-Hadron scattering (experiments)
Depositing User: Symplectic Admin
Date Deposited: 12 Feb 2018 10:45
Last Modified: 06 Oct 2023 19:11
DOI: 10.1007/JHEP01(2018)063
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3017811