Limits on Non-Standard Top Quark Couplings from Electroweak Measurements

Abstract

We calculate the typical size of loop corrections to electroweak observables arising from non-standard $Z\overline{t}t$ and $Wtb$ vertices. We use an effective Lagrangian formalism based on the electroweak gauge group $SU(2{)}_L\times U(1{)}_Y\to U(1{)}_{EM}$. Limits on the non-standard model top quark couplings from electroweak observables are presented and compared with previously obtained limits.

9 pages, uses epsf.sty

References in corpus (13)

• Topcolor Assisted Technicolor
• Natural Topcolor--Assisted Technicolor
• A Heavy Top Quark and the $Zb\bar{b}$ Vertex in Non-Commuting Extended Technicolor
• Probing the Couplings of the Top Quark to Gauge Bosons
• Determining ${\alpha }_s$ from Measurements at $Z$: How Nature Prompts us about New Physics
• A Global Analysis of the Top Quark Couplings to Gauge Bosons
• A Global Fit of LEP/SLC Data with Light Superpartners
• Z -> b\bar{b} Versus Dynamical Electroweak Symmetry Breaking involving the Top Quark
• Using $b\to s\gamma$ to Probe Top Quark Couplings
• Bounds on Anomalous Gauge Boson Couplings From Partial Z Widths at LEP
• Nonoblique Corrections in Technicolor Theories Revisited
• Unitarity And Anomalous Top-Quark Yukawa Couplings
• The Chiral Lagrangian Approach to the Non-universal Effects in the Zbb Vertex

Cited by in corpus (13)

• Radion Dynamics and Electroweak Physics
• Dimension-six CP-conserving operators of the third-family quarks and their effects on collider observables
• The $Z\to b\bar{b}$ Decay Asymmetry and Left-Right Models
• Measurement of the Helicity of W Bosons in Top Quark Decays
• $t\to bW$ in NonCommutative Standard Model
• CP Violation in B Decays from Anomalous tbW Interactions
• Hadron Collider Signatures for New Interactions of Top and Bottom Quarks
• Unitarity Constraints on Anomalous Top Quark Couplings to Weak Gauge Bosons
• Negative contributions to S in an effective field theory
• Probing anomalous top quark couplings at eγcolliders
• Probing Top-Quark Couplings at Lepton and Photon Colliders
• CP-odd static electromagnetic properties of the W gauge boson and the t quark via the anomalous tbW coupling
• b b-bar Production on the Z Resonance and Implications for LEP2