The simplest of them all: $t\bar{t}{W}^{\pm }$ at NLO accuracy in QCD

Abstract

Recent measurements of the $pp\to t\bar{t}{W}^{\pm }$ process in multi-lepton final states, as performed by the ATLAS collaboration in the context of the Higgs boson studies in the $t\bar{t}H$ channel, have shown discrepancies between theoretical predictions and experimental data. Such discrepancies have been observed both in the overall normalisation as well as in the modelling of the $t\bar{t}{W}^{\pm }$ process. With the goal of understanding and resolving the modelling issues within the SM $t\bar{t}{W}^{\pm }$ process we report on the state-of-the-art NLO QCD computation for this process. Specifically, we calculate higher-order corrections to the $e^{+}{\nu }_e{\mu }^{-}{\bar{\nu }}_{\mu }{e}^{+}{\nu }_{e}b\bar{b}$ and $e^{-}{\bar{\nu }}_e{\mu }^{+}{\nu }_{\mu }{e}^{-}{\bar{\nu }}_{e}b\bar{b}$ final state at the LHC with $\sqrt{s}=13$ TeV. In the computation off-shell top quarks are described by Breit-Wigner propagators, furthermore, double-, single- as well as non-resonant top-quark contributions along with all interference effects are consistently incorporated at the matrix element level. Results at NLO QCD accuracy are presented in the form of fiducial integrated and differential cross sections for two selected renormalisation and factorisation scale choices and three different PDF sets. The impact of the top quark off-shell effects on the $t\bar{t}{W}^{\pm }$ cross section is also examined by an explicit comparison to the narrow-width approximation.

arXiv comment34 pages, 10 figures, 5 tables, version to appear in JHEP

References in corpus (61)

• 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
• Parton distributions for the LHC Run II
• Event generation with SHERPA 1.1
• LHAPDF6: parton density access in the LHC precision era
• A General Algorithm for Calculating Jet Cross Sections in NLO QCD
• PDF4LHC recommendations for LHC Run II
• New parton distribution functions from a global analysis of quantum chromodynamics
• Parton distributions in the LHC era: MMHT 2014 PDFs
• Scattering Amplitudes with Open Loops
• Reducing full one-loop amplitudes to scalar integrals at the integrand level
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• The Dipole Formalism for Next-to-Leading Order QCD Calculations with Massive Partons
• ROOT - A C++ Framework for Petabyte Data Storage, Statistical Analysis and Visualization
• CutTools: a program implementing the OPP reduction method to compute one-loop amplitudes
• Automation of one-loop QCD corrections
• Higgs Radiation off Top Quarks at the Tevatron and the LHC
• NLO QCD corrections to t anti-t H production in hadron collisions
• Predictions for all processes e^+e^- -> 4 fermions + gamma
• OneLOop: for the evaluation of one-loop scalar functions
• Bosonic Supersymmetry? Getting Fooled at the LHC
• Associated Higgs production with top quarks at the Large Hadron Collider: NLO QCD corrections
• Assault on the NLO Wishlist: pp -> tt bb
• t \bar{t} W production and decay at NLO
• Helac-nlo
• Automated one-loop calculations: a proof of concept
• Complete off-shell effects in top quark pair hadroproduction with leptonic decay at next-to-leading order
• Signals for Minimal Supergravity at the CERN Large Hadron Collider II: Multilepton Channels
• Helac-Phegas: a generator for all parton level processes
• 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
• Next-to-leading order QCD corrections to t-tbar-Z production at the LHC
• Polarizing the Dipoles
• NLO QCD corrections to off-shell top-antitop production with leptonic decays at hadron colliders
• Discovering the top partners at the LHC using same-sign dilepton final states
• Reconstruction and identification of tau lepton decays to hadrons and tau neutrino at CMS
• Dynamical scales for multi-TeV top-pair production at the LHC
• Precision phenomenology with MCFM
• Associated production of a top-quark pair with vector bosons at NLO in QCD: impact on $t\bar{t}H$ searches at the LHC
• Ntuples for NLO Events at Hadron Colliders
• Second Order QCD Corrections to $\Gamma (t\to Wb)$
• Discovering Supersymmetry with Like-sign Dileptons
• How suppressed are the radiative interference effects in heavy unstable particle production?
• Top quark pair production in association with a Z-boson at NLO accuracy
• 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
• Top Quark Pair Production in Association with a Jet with NLO QCD Off-Shell Effects at the Large Hadron Collider
• Finite-Width Effects in Top Quark Production at Hadron Colliders
• Off-shell Top Quarks with One Jet at the LHC: A comprehensive analysis at NLO QCD
• Complete Nagy-Soper subtraction for next-to-leading order calculations in QCD
• Matching the Nagy-Soper parton shower at next-to-leading order
• Top-antitop and Top-top Resonances in the Dilepton Channel at the CERN LHC
• Single production of doubly charged Higgs bosons at hadron colliders
• Supersymmetric NLO QCD Corrections to Resonant Slepton Production and Signals at the Tevatron and the LHC
• Like-sign dilepton signature for gluino production at LHC including top quark and higgs boson effects
• Hard Photons in Hadroproduction of Top Quarks with Realistic Final States
• Same-sign dileptons as a signature for heavy Majorana neutrinos in hadron-hadron collisions
• Associated production of a top pair and a W boson at next-to-next-to-leading logarithmic accuracy
• Towards constraining Dark Matter at the LHC: Higher order QCD predictions for $t\bar{t}+Z(Z\to {\nu }_{\ell }{\bar{\nu }}_{\ell })$
• Off-shell vs on-shell modelling of top quarks in photon associated production

Cited by in corpus (27)

• 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
• Les Houches 2021: Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
• Anatomy of inclusive $t\overline{t}W$ production at hadron colliders
• Top-quark pair production in association with a $W^{\pm }$ gauge boson in the POWHEG-BOX
• Production and decay of the Higgs boson in association with top quarks
• $t\bar{t}b\bar{b}$ at the LHC: On the size of corrections and $b$-jet definitions
• Modeling uncertainties of $t\bar{t}{W}^{\pm }$ multilepton signatures
• Combined NLO EW and QCD corrections to off-shell $\text{t}\overline{\text{t}}\text{W}$ production at the LHC
• Full NLO QCD corrections to off-shell ttbb production
• NLO QCD corrections to off-shell $\text{t}\bar{\text{t}}{\text{W}}^{+}$ production at the LHC
• Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• NLO QCD corrections to full off-shell production of $t\bar{t}Z$ including leptonic decays
• $t\bar{t}b\bar{b}$ at the LHC: On the size of off-shell effects and prompt $b$-jet identification
• Two-loop Feynman integrals for leading colour $t\bar{t}W$ production at hadron colliders
• $\mathcal{C}\mathcal{P}$ structure of the top-quark Yukawa interaction: NLO QCD corrections and off-shell effects
• 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
• Hadronic production of top-quark pairs in association with a pair of leptons in the POWHEG BOX framework
• Four top final states with NLO accuracy in perturbative QCD: 4 lepton channel
• Les Houches 2023 -- Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
• The impact of top-quark modelling on the exclusion limits in $\mathbf{t}\bar{\mathbf{t}}+\text{DM}$ searches at the LHC
• Topping-up multilepton plus b-jets anomalies at the LHC with a $Z^{\prime }$ boson
• Four top final states with NLO accuracy in perturbative QCD: 3 lepton channel
• NLO QCD corrections to off-shell $t\bar{t}{W}^{\pm }$ production at the LHC: Correlations and Asymmetries
• NLO QCD predictions for off-shell $t\bar{t}W$ production in association with a light jet at the LHC
• Measurements of ttW differential cross sections and the leptonic charge asymmetry at $\sqrt{s}$ = 13 TeV
• Probing new physics with charge asymmetries in 2 same-sign leptons plus jets final states at the LHC