Study of jets produced in association with a W boson in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

Abstract

We report a study of final states containing a W boson and hadronic jets, produced in proton-proton collisions at a center-of-mass energy of 7 TeV. The data were collected with the ATLAS detector at the CERN LHC and comprise the full 2010 data sample of 36 pb^-1. Cross sections are determined using both the electron and muon decay modes of the W boson and are presented as a function of inclusive jet multiplicity, N_jet, for up to five jets. At each multiplicity, cross sections are presented as a function of jet transverse momentum, the scalar sum of the transverse momenta of the charged lepton, missing transverse momentum, and all jets, the invariant mass spectra of jets, and the rapidity distributions of various combinations of leptons and final-state jets. The results, corrected for all detector effects and for all backgrounds such as diboson and top quark pair production, are compared with particle-level predictions from perturbative QCD. Leading-order multiparton event generators, normalized to the NNLO total cross section for inclusive W-boson production, describe the data reasonably well for all measured inclusive jet multiplicities. Next-to-leading-order calculations from MCFM, studied here for N_jet >= 2, and BlackHat-Sherpa, studied here for N_jet >= 4, are found to be mostly in good agreement with the data.

33 pages plus author list (45 pages total), 46 figures, 5 tables, revised author list, matches Physical Review D version

References in corpus (12)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Event generation with SHERPA 1.1
• Implications of CTEQ global analysis for collider observables
• -- HATHOR -- HAdronic Top and Heavy quarks crOss section calculatoR
• Single-top hadroproduction in association with a W boson
• Electroweak gauge boson production at hadron colliders through O(alpha_s^2)
• Parton Distributions for LO Generators
• Theoretical status and prospects for top-quark pair production at hadron colliders
• Precise Predictions for W + 4 Jet Production at the Large Hadron Collider
• W+3 jet production at the Tevatron

Cited by in corpus (56)

• QCD matrix elements + parton showers: The NLO case
• Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012 LHC proton-proton collision data
• Merging Multi-leg NLO Matrix Elements with Parton Showers
• Measurement of hard double-parton interactions in W->lv+ 2 jet events at sqrt(s)=7 TeV with the ATLAS detector
• NLO QCD+EW predictions for V+jets including off-shell vector-boson decays and multijet merging
• The PDF4LHC report on PDFs and LHC data: Results from Run I and preparation for Run II
• Performance of jet substructure techniques for large-R jets in proton-proton collisions at sqrt(s) = 7 TeV using the ATLAS detector
• Measurement of the production cross section of jets in association with a Z boson in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Next-to-Leading Order W + 5-Jet Production at the LHC
• Transverse momentum dependent gluon density from DIS precision data
• Measurements of the W production cross sections in association with jets with the ATLAS detector
• Ntuples for NLO Events at Hadron Colliders
• Unitarising Matrix Element + Parton Shower merging
• Collinear and TMD Quark and Gluon Densities from Parton Branching Solution of QCD Evolution Equations
• Differential cross section measurements for the production of a W boson in association with jets in proton-proton collisions at sqrt(s) = 7 TeV
• Cross Section Ratios between different CM energies at the LHC: opportunities for precision measurements and BSM sensitivity
• Hide and Seek With Natural Supersymmetry at the LHC
• W+n-jet predictions at the Large Hadron Collider at next-to-leading order matched with a parton shower
• Herwig 7.2 Release Note
• Higgs Boson pair production merged to one jet
• Studies of W boson plus jets production in p\bar{p} collisions at sqrt(s)=1.96 TeV
• Measurement of the $t\bar{t}$ production cross-section as a function of jet multiplicity and jet transverse momentum in 7 TeV proton-proton collisions with the ATLAS detector
• Measurement of event shapes at large momentum transfer with the ATLAS detector in pp collisions at sqrt(s) = 7 TeV
• W Plus Multiple Jets at the LHC with High Energy Jets
• 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
• Hadroproduction of electroweak gauge boson plus jets and TMD parton density functions
• Search for pair production of a new quark that decays to a Z boson and a bottom quark with the ATLAS detector
• Ratios of $W$ and $Z$ cross sections at large boson $p_T$ as a constraint on PDFs and background to new physics
• Next-to-Leading Order Gamma Gamma + 2-Jet Production at the LHC
• W and Z bosons in association with two jets using the POWHEG method
• Rapidity distributions in exclusive Z + jet and photon + jet events in pp collisions at sqrt(s) = 7 TeV
• Simulated NNLO for high-pT observables in vector boson + jets production at the LHC
• Measurement of the cross-section of high transverse momentum vector bosons reconstructed as single jets and studies of jet substructure in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector
• Missing Energy and Jets for Supersymmetry Searches
• Measurement of kT splitting scales in W->lv events at sqrt(s)=7 TeV with the ATLAS detector
• ELSA -- Enhanced latent spaces for improved collider simulations
• Hard Processes in Proton-Proton Collisions at the Large Hadron Collider
• Collider Signatures of Goldstone Bosons
• Weak Vector Boson Production with Many Jets at the LHC $\sqrt{s}=13$ TeV
• Vector Bosons and Jets in Proton Collisions
• Ultraviolet Completions of Axigluon Models and Their Phenomenological Consequences
• Neutralino and Chargino Production in U(1)' at the LHC
• Review of single vector boson production in pp collisions at $\sqrt{s}=7$ TeV
• $Z^0$ boson associated b-jet production in high-energy nuclear collisions
• Extrapolating W-Associated Jet-Production Ratios at the LHC
• Studies of Quantum Chromodynamics at the LHC
• ME-PS matching in the simulation of multi-jet production in hadron collisions using a subtraction method
• WZ and W+jets production at large transverse momenta beyond NLO
• The High Energy Jets Framework
• Electroweak Measurements with the ATLAS and CMS Experiments
• Proton structure functions at low $x$: the Fractal distributions
• Vector boson plus multijet production
• High multiplicity W+jets predictions at NLO
• Herwig++ 2.7 Release Note
• W+n-jet predictions at NLO matched with a parton shower
• Vector boson+jets as background to top-quark physics at Tevatron and LHC