Top quark anomalous couplings at the International Linear Collider

Abstract

We present a study of the experimental determination of the forward-backward asymmetry in the process $e^{+}{e}^{-}\to t\bar{t}$ and in the subsequent $t\to Wb$ decay, studied in the context of the International Linear Collider. This process probes the elementary couplings of the top quark to the photon, the $Z$ and the $W$ bosons at a level of precision that is difficult to achieve at hadron colliders. Measurement of the forward-backward asymmetry requires excellent $b$ quark identification and determination of the quark charge. The study reported here is performed in the most challenging all-hadronic channel $e^{+}{e}^{-}\to b\bar{b}q\bar{q}q\bar{q}$. It includes realistic details of the experimental environment, a full Monte Carlo simulation of the detector, based on the Silicon Detector concept, and realistic event reconstruction. The forward-backward asymmetries are determined to a precision of approximately 1% for each of two choices of beam polarization. We analyze the implications for the determination of the $t\bar{t}Z$ and $Wtb$ couplings.

References in corpus (6)

• Warped/Composite Phenomenology Simplified
• Experimental discrimination between charge 2e/3 top quark and charge 4e/3 exotic quark production scenarios
• The LCFIVertex package: vertexing, flavour tagging and vertex charge reconstruction with an ILC vertex detector
• Measurement of Bd mixing using opposite-side flavor tagging
• Measurement of W-Boson Helicity Fractions in Top-Quark Decays Using costheta*
• Physics at International Linear Collider (ILC)

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