Bounding the $Z^\prime tc$ coupling from $D^{0}-\bar{D^{0}}$ mixing and single top production at the ILC

TL;DR

This paper constrains the $Z^\prime tc$ coupling using $D^{0}-ar{D^{0}}$ mixing data and explores its implications for single top production at the ILC, predicting observable event rates and decay branching ratios.

Contribution

It provides the first bounds on the $Z^\prime tc$ coupling from meson mixing and analyzes its potential detection at the ILC through single top production.

Findings

Coupling strength less than 5.75×10^{-2}

Approximately 10^7 $tc$ events expected at ILC

Branching ratio of $Z^\prime o tc$ predicted as 10^{-2}

Abstract

In the present work the $Z^\prime tc$ coupling is bounded by using the current experimental data on the $D^{0}-\bar{D^{0}}$ meson-mixing system. It is found that the strength associated to this coupling is less than $5.75\times 10^{-2}$. The single top production through the $e^+e^-\to Z^\prime\to tc$ process at the $Z^\prime$ boson resonance is studied and we found that around $10^7$ $tc$ events will be expected at the International Linear Collider. For the $Z^\prime\to tc$ decay, we predict a branching ratio of $10^{-2}$.