Model Independent Constraints Among the Wtb, Zbb, and Ztt Couplings

Abstract

Using an effective Lagrangian approach, we perform a model-independent analysis of the interactions among electroweak gauge bosons and the third generation quarks, i.e. the Wtb, Ztt and Zbb couplings. After one imposes the known experimental constraint on the Z b_L b_L coupling, we show that the electroweak symmetry of the standard model specifies the pattern of deviations of the Z t_L t_L and W t_L b_L couplings, independent of underlying new physics scenarios. We study implications of the predicted pattern with data on the single top quark and Ztt associated production processes at the Large Hadron Collider. Such an analysis could in principle allow for a determination of the Wtb coupling without prior knowledge of |V_{tb}|, which is otherwise difficult to achieve.

arXiv commentversion in Phys.Rev.D

References in corpus (61)

• A Large Mass Hierarchy from a Small Extra Dimension
• The Hierarchy Problem and New Dimensions at a Millimeter
• Electroweak symmetry breaking from dimensional deconstruction
• The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
• Single-top hadroproduction in association with a W boson
• Higgs as a Holographic Pseudo-Goldstone Boson
• A custodial symmetry for Zbb
• Electroweak symmetry breaking after LEP1 and LEP2
• TeV Symmetry and the Little Hierarchy Problem
• Light custodians in natural composite Higgs models
• Weak Radiative B-Meson Decay Beyond Leading Logarithms
• Little Hierarchy, Little Higgses, and a Little Symmetry
• Four Generations and Higgs Physics
• Phenomenology of the Littlest Higgs with T-Parity
• Observation of Single Top-Quark Production
• Patterns of Deviation from the Standard Model
• Top Quark Seesaw Theory of Electroweak Symmetry Breaking
• T Parity and the Littlest Higgs
• Single top production and decay at next-to-leading order
• Electroweak Precision Constraints on the Littlest Higgs Model with T Parity
• Angular Correlations in Top Quark Pair Production and Decay at Hadron Colliders
• Single top quark production at the Tevatron: threshold resummation and finite-order soft gluon corrections
• Single-top production in MC@NLO
• Beautiful Mirrors and Precision Electroweak Data
• Understanding single-top-quark production and jets at hadron colliders
• Observable contributions of new exotic quarks to quark mixing
• Next-to-leading order corrections to Wt production and decay
• Next-to-leading-order predictions for t-channel single-top production at hadron colliders
• Is Vtb=1 ?
• Next-to-leading order QCD corrections to t-tbar-Z production at the LHC
• Top Quark Compositeness: Feasibility and Implications
• Effective description of quark mixing
• Top Partners at the LHC: Spin and Mass Measurement
• Bounds on Kaluza-Klein excitations of the SM vector bosons from electroweak tests
• Probing Electroweak Top Quark Couplings at Hadron Colliders
• Spin Correlations in Top-Quark Pair Production at $e^{+}{e}^{-}$ Colliders
• Evidence for production of single top quarks and first direct measurement of |Vtb|
• Phenomenology of Littlest Higgs Model with T-parity: including effects of T-odd fermions
• Next-to-Leading Order Corrections to Single Top Quark Production and Decay at the Tevatron: 2. $t$-channel Process
• Electroweak Precision Tests: A Concise Review
• Anomalous Wtb coupling effects in the weak radiative B-meson decay
• Fully differential W' production and decay at next-to-leading order in QCD
• Analysis of tbW and ttZ couplings from CLEO and LEP/SLC data
• Electroweak and Flavour Structure of a Warped Extra Dimension with Custodial Protection
• Single Top Quark Production and Decay at Next-to-leading Order in Hadron Collision
• Probing the Couplings of the Top Quark to Gauge Bosons
• Next-to-Leading Order Corrections to Single Top Quark Production and Decay at the Tevatron: 1. s-channel Process
• Search for one large extra dimension with the DELPHI detector at LEP
• General Analysis of Single Top Production and W Helicity in Top Decay
• A Global Analysis of the Top Quark Couplings to Gauge Bosons
• Angular correlations in single-top-quark and Wjj production at next-to-leading order
• The Impact of Kaluza-Klein Fermions on Standard Model Fermion Couplings in a RS Model with Custodial Protection
• Improved Measurement of ttZ Couplings at the LHC
• Trilepton production at the CERN LHC: Standard model sources and beyond
• Anomalous Couplings of the Third Generation in Rare B Decays
• Impact of Single-Top Measurement to Littlest Higgs Model with T-Parity
• Measuring effective electroweak couplings in single top production at the LHC
• Search for new physics via single top production at TeV energy $e\gamma$ colliders
• A study of top polarization in single-top production at the LHC
• Measuring the W-t-b Interaction at the ILC
• Polarized Single Top Quark Production in eγCollision and Anomalous Wtb Couplings

Cited by in corpus (27)

• Theoretical Constraints on the Higgs Effective Couplings
• Physics at the e+ e- Linear Collider
• Forward-Backward Asymmetry of Top Quark Pair Production
• Strong tW Scattering at the LHC
• Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Pinning down electroweak dipole operators of the top quark
• Observation of top quark pairs produced in association with a vector boson in pp collisions at sqrt(s) = 8 TeV
• A General Analysis of Wtb anomalous Couplings
• Multi-Parton Scattering Amplitudes via On-Shell Methods
• Anomalous Wtb couplings in gamma-proton collision at the LHC
• Search for single production of the vector-like top partner at the 14 TeV LHC
• Determining $V_{tb}$ at Electron-Positron Colliders
• Anomalous Top Couplings at Hadron Colliders Revisited
• Search for single production of vector-like top partners at the Large Hadron Electron Collider
• Search for single production of the heavy vectorlike $T$ quark with $T\to th$ and $h\to \gamma \gamma$ at the high-luminosity LHC
• Probing $Zt\bar{t}$ couplings using $Z$ boson polarization in $ZZ$ production at hadron colliders
• Searches for top-Higgs FCNC couplings via the Whj signal with $h\to \gamma \gamma$ at the LHC
• NLO QCD corrections to full off-shell production of $t\bar{t}Z$ including leptonic decays
• Full analysis of general non-standard tbW couplings
• Fermion Masses in Emergent Electroweak Symmetry Breaking
• Limits on the anomalous $Wtq$ couplings
• Transverse Momentum Resummation for $s$-channel single top quark production at the LHC
• Bottom-quark Forward-Backward Asymmetry, Dark Matter and the LHC
• New Physics effects on hadronic decay asymmetries of the Top quark
• QCD correction to single top quark production at the ILC
• Associated Production of Single Top Quark and W-boson Through Anomalous Couplings at LHeC based $\gamma p$ Colliders
• Constraints on Little Higgs with Fully-Radiative Electroweak Symmetry Breaking