Probing Top-Quark Couplings at Polarized NLC

Abstract

The energy spectrum of the lepton(s) in e^+e^- --> tt-bar --> l^{+-} ...../l^+l^-..... at next linear colliders (NLC) is studied for arbitrary longitudinal beam polarizations as a possible test of new physics in top-quark couplings. The most general non-standard couplings for gamma-tt-bar, Ztt-bar and Wtb vertices are considered. Expected precision of the non-standard-parameter determination is estimated applying the optimal-observable procedure.

Final version, To appear in Phys. Rev. D

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Cited by in corpus (26)

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• Global and optimal probes for the top-quark effective field theory at future lepton colliders
• Constraints on Non-standard Top Quark Couplings
• Optimal-Observable Analysis of the Angular and Energy Distributions for Top-Quark Decay Products at Polarized Linear Colliders
• Improved Measurement of ttZ Couplings at the LHC
• Top effective operators at the ILC
• Anomalous Wtb couplings in gamma-proton collision at the LHC
• Top quark anomalous couplings at the International Linear Collider
• Probing anomalous $ZZ\gamma$ and $Z\gamma \gamma$ Couplings at the $e^{+}{e}^{-}$ Colliders using Optimal Observable Technique
• Probing heavy charged fermions at $e^{+}{e}^{-}$ collider using the Optimal Observable Technique
• Optimal estimation of Dimension-8 Neutral Triple Gauge Couplings at $e^{+}{e}^{-}$ Colliders
• Optimal determination of New Physics couplings: A comparative study
• Probe of CP Violation in e+e- -> ttbar Near Threshold
• Two-particle kinematic distributions from new physics at an electron-positron collider with polarized beams
• Effect of top quark spin on the unparticle couplings in γγ\to t\bar{t}
• Exploring Optimal Sensitivity of Lepton Flavor Violating Effective Couplings at the $e^{+}{e}^{-}$ Colliders
• Polarized Single Top Quark Production in eγCollision and Anomalous Wtb Couplings
• QCD Loop Corrections to Top Production and Decay at e^+ e^- Colliders
• Generalized top-spin analysis and new physics in $e^{+}{e}^{-}$ collisions with beam polarization
• Optimal sensitivity of anomalous charged triple gauge couplings through $W$ boson helicity at the $e^{+}{e}^{-}$ colliders
• Decay-lepton angular distributions in e+e- -> t tbar to O(alpha_s) in the soft-gluon approximation
• CP violating Z t anti-t and gamma t anti-t Couplings at a Future e+ e- Collider
• Optimal New Physics estimation in presence of Standard Model backgrounds