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

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.)${}_{-22}^{+28}$ (syst.) $\pm 2$ (lumi.) pb. The measurement is in agreement with the Standard Model prediction of ${\sigma }_{\mathrm{theory}}=71.7\pm 1.8(\mathrm{scale})\pm 3.4(\mathrm{PDF})\mathrm{pb}$.

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/

References in corpus (16)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Parton distributions for the LHC
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• New parton distributions for collider physics
• Event generation with SHERPA 1.1
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• Single-top hadroproduction in association with a W boson
• The PDF4LHC Working Group Interim Recommendations
• Luminosity determination in pp collisions at $\sqrt{s}$ = 8 TeV using the ATLAS detector at the LHC
• Measurement of the $Z/{\gamma }^{\ast }$ boson transverse momentum distribution in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector
• Jet energy measurement and its systematic uncertainty in proton-proton collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• HistFitter software framework for statistical data analysis
• Evidence for associated production of a single top quark and W boson in pp collisions at sqrt(s) = 7 TeV
• Search for New Physics via Single Top Production at the LHC

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