ShivaSankar K. A.

Quantum spin correlations in $Z^\prime$-mediated $t\bar{t}$ production at future lepton colliders

We study quantum spin correlations in top-quark pair production at future lepton colliders in the presence of a neutral gauge boson from anomaly-free general $U(1)$ extensions of the Standard Model. The process $\ell^+\ell^-\to t\bar t$, with $\ell=e,\mu$, is analyzed through the spin-density matrix including $\gamma$,...