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Scientific article
Open access
English

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

ContributorsATLAS Collaboration
Published inJournal of High Energy Physics, vol. 1801, p. 063-105
Collection
  • Open Access - SCOAP3
Publication date2018
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 √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 W t signal is then separated from the t 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 σ W t = 94 ± 10(stat.) − 22 + 28 (syst.) ± 2(lumi.) pb. The measured value is in good agreement with the SM prediction of σ theory = 71 . 7±1 . 8 (scale)± 3 . 4 (PDF) pb [1].

Keywords
  • Hadron-Hadron scattering (experiments)
Citation (ISO format)
ATLAS Collaboration. Measurement of the cross-section for producing a W boson in association with a single top quark in pp collisions at √s = 13 TeV with ATLAS. In: Journal of High Energy Physics, 2018, vol. 1801, p. 063–105. doi: 10.1007/JHEP01(2018)063
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Article (Published version)
Identifiers
ISSN of the journal1029-8479
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