The spin density matrix of top quark pairs produced in electron-positron annihilation including QCD radiative corrections

A. Brandenburg, M. Flesch, P. Uwer

We calculate the spin density matrix of top quark pairs for the reaction $e^{+}{e}^{-}\to t\bar{t}X$ to order ${\alpha }_s$. As an application we show next-to-leading order results for a variety…