Measurement of the production of a W boson in association with a charm quark in pp collisions at sqrt(s)=7 TeV with the ATLAS detector

Abstract

The production of a W boson in association with a single charm quark is studied using 4.6 fb^-1 of pp collision data at sqrt(s)=7 TeV collected with the ATLAS detector at the Large Hadron Collider. In events in which a W boson decays to an electron or muon, the charm quark is tagged either by its semileptonic decay to a muon or by the presence of a charmed meson. The integrated and differential cross sections as a function of the pseudorapidity of the lepton from the W-boson decay are measured. Results are compared to the predictions of next-to-leading-order QCD calculations obtained from various parton distribution function parameterisations. The ratio of the strange-to-down sea-quark distributions is determined to be 0.96 +0.26 -0.30 at Q^2=1.9 GeV^2, which supports the hypothesis of an SU(3)-symmetric composition of the light-quark sea. Additionally, the cross-section ratio sigma(W^+ + bar{c})/sigma(W^- + c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the s-bar{s} quark asymmetry.

52 pages plus author list (74 pages total), 16 figures, 11 tables, submitted to JHEP, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2012-14/

References in corpus (17)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• New parton distributions for collider physics
• Herwig++ Physics and Manual
• Vector boson pair production at the LHC
• MCFM for the Tevatron and the LHC
• NLO vector-boson production matched with shower in POWHEG
• Electron reconstruction and identification efficiency measurements with the ATLAS detector using the 2011 LHC proton-proton collision data
• Scalar and pseudoscalar Higgs production in association with a top-antitop pair
• Determination of the strange quark density of the proton from ATLAS measurements of the W->l nu and Z->ll cross sections
• The Charm Parton Content of the Nucleon
• Precision determination of electroweak parameters and the strange content of the proton from neutrino deep-inelastic scattering
• CT14 Intrinsic Charm Parton Distribution Functions from CTEQ-TEA Global Analysis
• Measurement of associated W + charm production in pp collisions at sqrt(s) = 7 TeV
• Measurement of the ratio of the $p\bar{p}\to W$+$c$-jet cross section to the inclusive $p\bar{p}\to W$+jets cross section
• Observation of the Production of a W Boson in Association with a Single Charm Quark

Cited by in corpus (80)

• Parton distributions for the LHC Run II
• Parton distributions from high-precision collider data
• New parton distribution functions from a global analysis of quantum chromodynamics
• New CTEQ global analysis of quantum chromodynamics with high-precision data from the LHC
• Parton Distribution Functions, ${\alpha }_s$ and Heavy-Quark Masses for LHC Run II
• Performance of $b$-Jet Identification in the ATLAS Experiment
• Electron reconstruction and identification efficiency measurements with the ATLAS detector using the 2011 LHC proton-proton collision data
• The Large Hadron-Electron Collider at the HL-LHC
• The Structure of the Proton in the LHC Precision Era
• Precision measurement and interpretation of inclusive $W^{+}$, $W^{-}$ and $Z/{\gamma }^{\ast }$ production cross sections with the ATLAS detector
• 50 Years of Quantum Chromodynamics
• Parton distributions and lattice QCD calculations: toward 3D structure
• Out-of-time-order correlations in many-body localized and thermal phases
• Measurement of many-body chaos using a quantum clock
• The PDF4LHC report on PDFs and LHC data: Results from Run I and preparation for Run II
• A Critical Appraisal and Evaluation of Modern PDFs
• Power law violation of the area law in quantum spin chains
• Strange quark suppression from a simultaneous Monte Carlo analysis of parton distributions and fragmentation functions
• aMCfast: automation of fast NLO computations for PDF fits
• Measurement of the $J/\psi$ pair production cross-section in $pp$ collisions at $\sqrt{s}=13\mathrm{TeV}$
• Measurement of $D^{\ast \pm }$, $D^{\pm }$ and $D_s^{\pm }$ meson production cross sections in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Towards Ultimate Parton Distributions at the High-Luminosity LHC
• Determination of Strange Sea Quark Distributions from Fixed-target and Collider Data
• Measurement of distributions sensitive to the underlying event in inclusive Z-boson production in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Flavor Structure of the Nucleon Sea
• Higgs Physics: It ain't over till it's over
• Measurement of associated production of a W boson and a charm quark in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Measurement of differential cross sections and $W^{+}/W^{-}$ cross-section ratios for $W$ boson production in association with jets at $\sqrt{s}=8$ TeV with the ATLAS detector
• Study of $W$ boson production in association with beauty and charm
• Testing new physics models with global comparisons to collider measurements: the Contur toolkit
• Strange sea determination from collider data
• Massively parallel simulations of relativistic fluid dynamics on graphics processing units with CUDA
• Predictions for $\mathrm{Z}$-boson production in association with a $\mathrm{b}$-jet at $\mathcal{O}({\alpha }_s^3)$
• Charm jets as a probe for strangeness at the future Electron-Ion Collider
• Measurements of the W boson rapidity, helicity, double-differential cross sections, and charge asymmetry in pp collisions at $\sqrt{s}=$ 13 TeV
• Probing nucleon strange and charm distributions with lattice QCD
• Scattering state and bound state of scalar field in Schwarzschild spacetime: Exact solution
• Determination of the parton distribution functions of the proton from ATLAS measurements of differential $W^{\pm }$ and $Z$ boson production in association with jets
• QCD analysis of the ATLAS and CMS $W^{\pm }$ and $Z$ cross-section measurements and implications for the strange sea density
• Propagation of shear stress in strongly interacting metallic Fermi liquids enhances transmission of terahertz radiation
• Parton distributions from nonlocal chiral SU(3) effective theory: Flavor asymmetries
• Dimuons in Neutrino Telescopes: New Predictions and First Search in IceCube
• Measurement of event-shape observables in $Z\to {\ell }^{+}{\ell }^{-}$ events in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector at the LHC
• Prospects for quarkonium studies at the high-luminosity LHC
• Impact of Lattice Strangeness Asymmetry Data in the CTEQ-TEA Global Analysis
• W+charm production with massive c quarks in PowHel
• Study of isolated prompt photon production in $p$-Pb collisions for the ALICE kinematics
• On the extraction of the intrinsic light-quark sea in the proton
• Gauge invariance and kaon production in deep inelastic scattering at low scales
• Pair production of quarkonia and electroweak bosons from double-parton scatterings in nuclear collisions at the LHC
• Measurement of the $W+b$-jet and $W+c$-jet differential production cross sections in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
• Associated $W^{\pm }{D}^{(\ast )}$ production at the LHC and prospects to observe double parton interactions
• Vector Bosons and Jets in Proton Collisions
• Ratio of strange to $u/d$ momentum fraction in disconnected insertions
• Improving estimates of the number of fake leptons and other mis-reconstructed objects in hadron collider events: BoB's your UNCLE. (Previously "The Matrix Method Reloaded")
• Review of single vector boson production in pp collisions at $\sqrt{s}=7$ TeV
• QCD analysis of CMS W + charm measurements at LHC with \sqrt s = 7TeV and implications for the strange PDF
• Associated production of electroweak bosons and heavy mesons at LHCb and prospects to observe double parton interactions
• Scalar field in Reissner-Nordström spacetime: Bound state and scattering state
• Investigating the Quantum Properties of Jets and the Search for a Supersymmetric Top Quark Partner with the ATLAS Detector
• Measurement of the production cross section for a W boson in association with a charm quark in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• NLO + parton-shower generator for Wc production in the POWHEG BOX RES
• Mapping Parton Distributions of Hadrons with Lattice QCD
• Stitching Monte Carlo samples
• Measurement of the production of a $W$ boson in association with a charmed hadron in $pp$ collisions at $\sqrt{s}=13\mathrm{TeV}$ with the ATLAS detector
• Measurement of vector boson plus $D^{\ast }(2010{)}^{+}$ meson production in $\bar{p}p$ collisions at $\sqrt{s}=1.96\mathrm{TeV}$
• Study of the $s-\bar{s}$ asymmetry in the proton
• Measurement of inclusive J/$\psi$ pair production cross section in pp collisions at $\sqrt{s}=13$ TeV
• Octet and decuplet contribution to the proton self energy
• Production of γγ+ 2jets from double parton scattering in proton-proton collisions at the LHC
• Surface tension of the horizon
• The Forward Physics Facility at the High-Luminosity LHC
• Nucleon parton distributions from hadronic quantum fluctuations
• Measurement of $W^{\pm }$-boson differential cross-sections in proton-proton collisions with low pile-up data at $\sqrt{s}=5.02$ TeV and $13$ TeV with the ATLAS detector
• A study of transverse momentum distributions of jets produced in p-p, p-\bar p, d-Au, Au-Au, and Pb-Pb collisions at high energies
• From C to Parton Sea: Bjorken-x Dependence of the PDFs
• Reinterpretation of proton strangeness between ATLAS and CMS measurements
• Probing the strange content of the proton with charm production in charged current at LHeC
• A QCD analysis of CMS inclusive differential Z production data at sqrt(s) = 8 TeV
• Measuring quark polarizations at ATLAS and CMS