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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
Université Mohamed Premier, Faculté des Sciences, Oujda; LPTPM, Oujda.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.ORCID iD: 0000-0002-1253-8583
University of Belgrade, Institute of Physics, Belgrade.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
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Number of Authors: 28562018 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 1, article id 063Article in journal (Refereed) Published
Abstract [en]

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 ($) over bar 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 σtheory = 71.7±1.8 (scale)± 3.4 (PDF) pb [1].

Place, publisher, year, edition, pages
2018. no 1, article id 063
Keywords [en]
Hadron-Hadron scattering (experiments)
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-345291DOI: 10.1007/JHEP01(2018)063ISI: 000423212200001OAI: oai:DiVA.org:uu-345291DiVA, id: diva2:1189002
Funder
Swedish Research CouncilEU, European Research CouncilEU, FP7, Seventh Framework ProgrammeEU, Horizon 2020German Research Foundation (DFG)European Social Fund (ESF)
Note

ATLAS Collaboration, for complete list of authors see https://doi.org/10.1007/JHEP01(2018)063

Available from: 2018-03-09 Created: 2018-03-09 Last updated: 2018-03-09Bibliographically approved

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Bergeås, Elin KuutmannBokan, PetarBrenner, RichardEkelöf, TordEllert, MattiasFerrari, ArnaudGradin, P.O. JoakimÖhman, HenrikRangel-Smith, CamillaSales De Bruin, Pedro H.
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