Measuring the W-t-b Interaction at the ILC

Abstract

The large top quark mass suggests that the top plays a pivotal role in Electroweak symmetry-breaking dynamics and, as a result, may have modified couplings to Electroweak bosons. Hadron colliders can provide measurements of these couplings at the ~10% level, and one of the early expected triumphs of the International Linear Collider is to reduce these uncertainties to the per cent level. In this article, we propose the first direct measurement of the Standard Model W-t-b coupling at the ILC, from measurements of t tbar-like signals below the t tbar production threshold. We estimate that the ILC with 100 fb^{-1} can measure a combination of the coupling and top width to high precision, and when combined with a direct measurement of the top width from the above-threshold scan, results in a model-independent measurement of the W-t-b interaction of the order of ~ 3%.

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Cited by in corpus (17)

• Is Vtb=1 ?
• Physics at the e+ e- Linear Collider
• Global and optimal probes for the top-quark effective field theory at future lepton colliders
• A General Analysis of Wtb anomalous Couplings
• Model Independent Constraints Among the Wtb, Zbb, and Ztt Couplings
• Anomalous Wtb couplings in gamma-proton collision at the LHC
• Search for new physics via single top production at TeV energy $e\gamma$ colliders
• Searches for top-Higgs FCNC couplings via the Whj signal with $h\to \gamma \gamma$ at the LHC
• Probing the top-quark width through ratios of resonance contributions of $e^{+}{e}^{-}\to W^{+}{W}^{-}b\bar{b}$
• Searching for Lepton Flavor Violation at a Future High Energy Electron-Positron Collider
• Full analysis of general non-standard tbW couplings
• Limits on the anomalous $Wtq$ couplings
• Effect of top quark spin on the unparticle couplings in γγ\to t\bar{t}
• Single top production at linear $e^{-}{e}^{+}$ colliders
• Polarized Single Top Quark Production in eγCollision and Anomalous Wtb Couplings
• Associated Production of Single Top Quark and W-boson Through Anomalous Couplings at LHeC based $\gamma p$ Colliders
• Sensitivity of a Future High Energy $e^{+}{e}^{-}$ Collider to $Z^{\prime }$ Bosons