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

Understand

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 $10^{-2}$.