Single top production in association with a $WZ$ pair at the LHC in the SMEFT

Abstract

We study single top quark production in association with a $WZ$ pair at the LHC in the context of the Standard Model (SM) and the Standard Model Effective Field Theory (SMEFT). A significant advantage of $tWZ$ compared to other EW top production processes is its sensitivity to unitarity-violating behaviour induced in its $2\to 2$ sub-amplitudes through modified EW interactions. At NLO in QCD, $tWZ$ interferes with $t\bar{t}Z$ and $t\bar{t}$ and a method to meaningfully separate it from these overlapping processes needs to be employed. In order to define $tWZ$ production for total rates and differential distributions, we consider the approaches proposed in the literature for similar cases and find that diagram-removal procedures provide reliable results both for the SM and the SMEFT in a suitably defined phase-space region. We provide robust results for total and differential cross sections for $tWZ$ at 13 TeV, including the six relevant dimension-6 operators (${\mathcal{O}}_{tW}$,${\mathcal{O}}_{tZ}$,${\mathcal{O}}_{tG}$,${\mathcal{O}}_{\varphi Q}^{(-)}$,${\mathcal{O}}_{\varphi Q}^{(3)}$,${\mathcal{O}}_{\varphi t}$), also matching short-distance events to parton shower.

arXiv comment33 pages with tables and figures. v2: minor typos are fixed. v3: minor typos are fixed, v4: minor typos are fixed, version accepted by JHEP

References in corpus (50)

• 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
• An Introduction to PYTHIA 8.2
• FastJet user manual
• Matching NLO QCD computations and parton shower simulations
• Parton distributions from high-precision collider data
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• Single-top hadroproduction in association with a W boson
• Electroweak corrections to charged-current e+e- --> 4 fermion processes - technical details and further results
• Predictions for all processes e^+e^- -> 4 fermions + gamma
• The automation of next-to-leading order electroweak calculations
• Top, Higgs, Diboson and Electroweak Fit to the Standard Model Effective Field Theory
• A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector
• O new physics, where art thou? A global search in the top sector
• Automated one-loop computations in the SMEFT
• Large NLO corrections in $t\bar{t}{W}^{\pm }$ and $t\bar{t}t\bar{t}$ hadroproduction from supposedly subleading EW contributions
• Energy helps accuracy: electroweak precision tests at hadron colliders
• Four-lepton production at hadron colliders: aMC@NLO predictions with theoretical uncertainties
• An NLO+PS generator for $t\bar{t}$ and $Wt$ production and decay including non-resonant and interference effects
• Helicity Selection Rules and Non-Interference for BSM Amplitudes
• tWH associated production at the LHC
• Higgs production in association with a top-antitop pair in the Standard Model Effective Field Theory at NLO in QCD
• On one-loop corrections in the standard model effective field theory; the $\Gamma (h\to \gamma \gamma )$ case
• Higgs decay to two photons at one-loop in the SMEFT
• NLO Higgs Effective Field Theory and kappa-framework
• Isolating Wt production at the LHC
• Strong tW Scattering at the LHC
• Automatic computations at next-to-leading order in QCD for top-quark flavor-changing neutral processes
• Single-top associated production with a $Z$ or $H$ boson at the LHC: the SMEFT interpretation
• Probing top-Z dipole moments at the LHC and ILC
• Top-quark decay into Higgs boson and a light quark at next-to-leading order in QCD
• Interpreting top-quark LHC measurements in the standard-model effective field theory
• Electroweak Higgs boson production in the standard model effective field theory beyond leading order in QCD
• Single Top Production at Next-to-Leading Order in the Standard Model Effective Field Theory
• Effective field theory approach to top-quark decay at next-to-leading order in QCD
• Higher Order QCD predictions for Associated Higgs production with anomalous couplings to gauge bosons
• Constraining couplings of the top quarks to the Z boson in ttbar+Z production at the LHC
• Automated Predictions from Polarized Matrix Elements
• Top-quark electroweak interactions at high energy
• Charged Higgs boson production in association with a top quark in MC@NLO
• Automated Squark and Gluino Production to Next-to-Leading Order
• One-loop corrections to $h\to b\bar{b}$ and $h\to \tau \bar{\tau }$ decays in the Standard Model Dimension-6 EFT: four-fermion operators and the large-$m_t$ limit
• Higgs Couplings without the Higgs
• Automized Squark-Neutralino Production to Next-to-Leading Order
• Matching Squark Pair Production at NLO with Parton Showers
• Observation of the associated production of a top quark and a $Z$ boson in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Automated simulations beyond the Standard Model: supersymmetry
• The top quark electro-weak couplings after LHC Run 2
• Squark Production and Decay matched with Parton Showers at NLO
• Towards constraining Dark Matter at the LHC: Higher order QCD predictions for $t\bar{t}+Z(Z\to {\nu }_{\ell }{\bar{\nu }}_{\ell })$

Cited by in corpus (12)

• The top quark legacy of the LHC Run II for PDF and SMEFT analyses
• Electroweak input schemes and universal corrections in SMEFT
• Dispelling the $\sqrt{L}$ myth for the High-Luminosity LHC
• Measurements of inclusive and differential cross sections for top quark production in association with a Z boson in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Anomalous gauge couplings vis-$\grave{a}$-vis $(g-2{)}_{\mu }$ and flavor observables
• Semi-dark Higgs decays: sweeping the Higgs neutrino floor
• Constraining the SMEFT with a differential cross section measurement of $tWZ$ production at the HL-LHC
• Evidence for tWZ production in proton-proton collisions at $\sqrt{s}$ = 13 TeV in multilepton final states
• Staying on Top of SMEFT-Likelihood Analyses
• Single-top quark physics at the LHC: from precision measurements to rare processes and top quark properties
• Probing effective operators in single top quark production in association with a lepton-neutrino pair
• Observation of tWZ production at the CMS experiment