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

2016/12/31 by M. Aaboud, ATLAS Collaboration, G. Aad +98 · 2 citations
Physics and Astronomy · #Atlas (anatomy) #Atlas detector #Boson #Electron #Hadron #High-Energy Particle Collisions Research #Large Hadron Collider #Lepton #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Quark #Top quark #hep-ex

paper · pdf · doi:10.1007/jhep01(2018)063

published as JHEP 01 (2018) 63 · 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/

openalex created_date 2017/01/06 · openalex publication_date 2018/01/01 · arxiv created 2018/01/26 · arxiv updated 2018/01/29 · openalex updated_date 2026/08/06

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 Wt signal is then separated from the tt 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 ± 10 (stat.)⁺²⁸_-22 (syst.) ± 2 (lumi.) pb. The measurement is in agreement with the Standard Model prediction of σ_theory = 71.7 ± 1.8 (scale) ± 3.4 (PDF) pb.

Citations

• The PDF4LHC Working Group Interim Recommendations
• Search for new physics via single-top production at the LHC
• Event generation with SHERPA 1.1
• Is Vtb≃1?
• Stochastic gradient boosting
• The anti-ktjet clustering algorithm
• HERWIG 6: an event generator for hadron emission reactions with interfering gluons (including supersymmetric processes)
• Observation of the Associated Production of a Single Top Quark and aWBoson inppCollisions ats=8 TeV
• TMVA - Toolkit for Multivariate Data Analysis
• CP-Violation in the Renormalizable Theory of Weak Interaction
• Dispelling the N3 myth for the kt jet-finder
• The Kolmogorov-Smirnov Test for Goodness of Fit

Cited by

• Measurement of W^± Z production cross sections and gauge boson polarisation in pp collisions at √(s) = 13~\text TeV with the ATLAS detector
• Measurement of differential cross-sections of a single top quark produced in association with a W boson at √(s)=13\text TeV s = 13 TeV with ATLAS