Measurement of the total and differential cross-sections of $t\bar{t}W$ production in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

Abstract

Measurements of inclusive and differential production cross-sections of a top-quark-top-antiquark pair in association with a $W$ boson ($t\bar{t}W$) are presented. They are performed by targeting final states with two same-sign or three isolated leptons (electrons or muons) and are based on $\sqrt{s}=13$ TeV proton-proton collision data with an integrated luminosity of 140 fb${}^{-1}$, recorded from 2015 to 2018 with the ATLAS detector at the Large Hadron Collider. The inclusive $t\bar{t}W$ production cross-section is measured to be $880\pm 80$ fb, compared to a reference theoretical prediction of $745\pm 50\text{(scale)}\pm 13\text{(2-loop approx.)}\pm 19\text{(PDF,}{\alpha }_{\text{S}})$ fb. Differential cross-section measurements characterise this process in detail for the first time. Several particle-level observables are compared with a variety of theoretical predictions, which generally agree well with the normalised differential cross-section results. Additionally, the relative charge asymmetry of $t\bar{t}{W}^{+}$ and $t\bar{t}{W}^{-}$ is measured inclusively to be $A_{\mathrm{C}}^{\mathrm{rel}}=0.33\pm 0.05$, in very good agreement with the theoretical prediction of $0.322\pm 0.003(\mathrm{scale})\pm 0.007(\mathrm{PDF})$, as well as differentially.

arXiv comment71 pages in total, author list starting page 54, 16 figures, 15 tables, published by JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2019-30

References in corpus (59)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• A Brief Introduction to PYTHIA 8.1
• FastJet user manual
• Asymptotic formulae for likelihood-based tests of new physics
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Parton distributions for the LHC Run II
• Event generation with SHERPA 1.1
• Herwig++ Physics and Manual
• Parton distributions from high-precision collider data
• The total top quark pair production cross-section at hadron colliders through O(alpha_S^4)
• Scattering Amplitudes with Open Loops
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• Herwig 7.0 / Herwig++ 3.0 Release Note
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• A Positive-Weight Next-to-Leading-Order Monte Carlo for Heavy Flavour Hadroproduction
• Comix, a new matrix element generator
• Event Generation with Sherpa 2.2
• QCD matrix elements + parton showers: The NLO case
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• Two-loop soft anomalous dimensions for single top quark associated production with a W- or H-
• Collier: a fortran-based Complex One-Loop LIbrary in Extended Regularizations
• Merging meets matching in MC@NLO
• -- HATHOR -- HAdronic Top and Heavy quarks crOss section calculatoR
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• Single-top hadroproduction in association with a W boson
• The Catchment Area of Jets
• Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to q qbar -> t tbar + X
• Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
• NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels
• NLO single-top production matched with shower in POWHEG: s- and t-channel contributions
• NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction
• OpenLoops 2
• Hadronic top-quark pair production with NNLL threshold resummation
• HATHOR for single top-quark production: Updated predictions and uncertainty estimates for single top-quark production in hadronic collisions
• Higgs boson production in association with top quarks in the POWHEG BOX
• Single-top t-channel hadroproduction in the four-flavour scheme with POWHEG and aMC@NLO
• t \bar{t} W production and decay at NLO
• Angular correlations of lepton pairs from vector boson and top quark decays in Monte Carlo simulations
• t tbar W and t tbar Z Hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects
• Large NLO corrections in $t\bar{t}{W}^{\pm }$ and $t\bar{t}t\bar{t}$ hadroproduction from supposedly subleading EW contributions
• Associated production of a top-quark pair with vector bosons at NLO in QCD: impact on $t\bar{t}H$ searches at the LHC
• Top-quark pair hadroproduction in association with a heavy boson at NLO+NNLL including EW corrections
• Strong tW Scattering at the LHC
• Associated production of a top quark pair with a heavy electroweak gauge boson at NLO+NNLL accuracy
• Top-quark charge asymmetry and polarization in $t\bar{t}{W}^{\pm }$ production at the LHC
• Associated top quark pair production with a heavy boson: differential cross sections at NLO+NNLL accuracy
• Multi-jet merged top-pair production including electroweak corrections
• Top-quark electroweak interactions at high energy
• On improving NLO merging for $t\bar{t}W$ production
• Precise predictions for the associated production of a $W$ boson with a top-antitop quark pair at the LHC
• Data Unfolding Methods in High Energy Physics
• Top-quark pair production in association with a $W^{\pm }$ gauge boson in the POWHEG-BOX
• The simplest of them all: $t\bar{t}{W}^{\pm }$ at NLO accuracy in QCD
• Combined NLO EW and QCD corrections to off-shell $\text{t}\overline{\text{t}}\text{W}$ production at the LHC
• Modeling uncertainties of $t\bar{t}{W}^{\pm }$ multilepton signatures
• NLO QCD corrections to off-shell $\text{t}\bar{\text{t}}{\text{W}}^{+}$ production at the LHC

Cited by in corpus (4)

• Resurrecting the LHC discovery potential in the extended Type-II Seesaw Model
• Search for charged-lepton-flavour violating $\mu \tau qt$ interactions in top-quark production and decay in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector at the LHC
• Search for cascade decays of charged sleptons and sneutrinos in final states with three leptons and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Measurement of high-mass $t\bar{t}{\ell }^{+}{\ell }^{-}$ production and lepton flavour universality-inspired effective field theory interpretations at $\sqrt{s}=13$ TeV with the ATLAS detector