Probing $Zt\bar{t}$ couplings using $Z$ boson polarization in $ZZ$ production at hadron colliders

Abstract

We propose to utilize the polarization information of the $Z$ bosons in $ZZ$ production, via the gluon-gluon fusion process $gg\to ZZ$, to probe the $Zt\bar{t}$ gauge coupling. The contribution of longitudinally polarized $Z$ bosons is sensitive to the axial-vector component ($a_t$) of the $Zt\bar{t}$ coupling. We demonstrate that the angular distribution of the charged lepton from $Z$ boson decays serves well for measuring the polarization of $Z$ bosons and the determination of $a_t$. We show that $ZZ$ production via the $gg\to ZZ$ process complement to $Zt\bar{t}$ and $tZj$ productions in measuring the $Zt\bar{t}$ coupling at hadron colliders.

arXiv comment6 pages, 8 figures; Final version published in PRD

References in corpus (48)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• A Brief Introduction to PYTHIA 8.1
• Asymptotic formulae for likelihood-based tests of new physics
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• Generating Feynman Diagrams and Amplitudes with FeynArts 3
• New Developments in FeynCalc 9.0
• ZZ production at hadron colliders in NNLO QCD
• The Composite Nambu-Goldstone Higgs
• Composite Higgses
• Constraining the Higgs boson width with ZZ production at the LHC
• Bounding the Higgs width at the LHC using full analytic results for gg -> 2e 2μ
• QCD corrections to ZZ production in gluon fusion at the LHC
• Constraining top quark effective theory in the LHC Run II era
• Probing Electroweak Top Quark Couplings at Hadron Colliders
• Measurement of the $t\bar{t}Z$ and $t\bar{t}W$ cross sections in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Single top production in association with a Z boson at the LHC
• Taming the off-shell Higgs boson
• Single-top associated production with a $Z$ or $H$ boson at the LHC: the SMEFT interpretation
• Constraints on off-shell Higgs boson production and the Higgs boson total width in $ZZ\to 4\ell$ and $ZZ\to 2\ell 2\nu$ final states with the ATLAS detector
• $ZZ$ production at the LHC: NLO QCD corrections to the loop-induced gluon fusion channel
• General Analysis of Single Top Production and W Helicity in Top Decay
• Measurement of top quark pair production in association with a Z boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Beyond Geolocating: Constraining Higher Dimensional Operators in $H\to 4\ell$ with Off-Shell Production and More
• Single Top Production at Next-to-Leading Order in the Standard Model Effective Field Theory
• Constraining couplings of the top quarks to the Z boson in ttbar+Z production at the LHC
• $ZZ$ production at the LHC: NNLO predictions for $2\ell 2\nu$ and $4\ell$ signatures
• A General Analysis of Wtb anomalous Couplings
• NNLO predictions for Z-boson pair production at the LHC
• 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
• The role of interference in unraveling the ZZ-couplings of the newly discovered boson at the LHC
• Soft gluon resummation in the signal-background interference process of $gg(\to h^{\ast })\to ZZ$
• Off-shell Higgs Probe to Naturalness
• Observation of single top quark production in association with a Z boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Resolving gluon fusion loops at current and future hadron colliders
• Higgs Couplings at High Scales
• Model Independent Constraints Among the Wtb, Zbb, and Ztt Couplings
• New limits on anomalous contributions to the $Wtb$ vertex
• Determining $V_{tb}$ at Electron-Positron Colliders
• Probing anomalous $Wtb$ couplings at the LHC in single top quark production through $t$-channel
• Polarization fraction measurement in ZZ scattering using deep learning
• On-shell interference effects in Higgs final states
• Transverse Momentum Resummation for $t$-channel single top quark production at the LHC
• Probing New Physics by the Tail of the Off-shell Higgs in $V_L{V}_L$ Mode
• Full analysis of general non-standard tbW couplings
• Transverse Momentum Resummation for $s$-channel single top quark production at the LHC
• Limits on the anomalous $Wtq$ couplings
• Electroweak Loops as a Probe of New Physics in $t\bar{t}$ Production at the LHC
• Coupling Extraction From Off-Shell Cross-sections

Cited by in corpus (19)

• Two-loop helicity amplitudes for $gg\to ZZ$ with full top-quark mass effects
• Constraints on anomalous quartic gauge couplings via $W\gamma jj$ production at the LHC
• The study of neutral triple gauge couplings in the process $e^{+}{e}^{-}\to Z\gamma$ including unitarity bounds
• Vector boson polarizations in the decay of the Standard Model Higgs
• Constraints on anomalous quartic gauge couplings via $Z\gamma jj$ production at the LHC
• The anomalous $Zb\bar{b}$ couplings: From LEP to LHC
• NLO QCD corrections to polarised di-boson production in semi-leptonic final states
• Polarized Z bosons from the decay of a Higgs boson produced in association with two jets at the LHC
• Off-shell Higgs Couplings in $H^{\ast }\to ZZ\to \ell \ell \nu \nu$
• Probing the electroweak symmetry breaking with Higgs production at the LHC
• Discriminating between Higgs Production Mechanisms via Jet Charge at the LHC
• Polarized ZZ pairs in gluon fusion and vector boson fusion at the LHC
• Electroweak Top Couplings, Partial Compositeness and Top Partner Searches
• Loop induced top quark FCNC through top quark and dark matter interactions
• Top quark effective couplings from top-pair tagged photoproduction in $p{e}^{-}$ collisions
• $CP$ violation in the $HZZ$ vertex and left-right asymmetries
• Probing top-quark electroweak couplings indirectly at the Electron-Ion Collider
• Analyzing $t\bar{t}Z$-couplings at the future $e^{-}p$ collider
• Single-spin measurements and heavy new physics in the $e^{+}{e}^{-}\to t\bar{t}$ process at an FCC-ee