Analytical $O({\alpha }_s)$ corrections to the beam frame double-spin density matrix elements of $e^{+}{e}^{-}\to t\bar{t}$

L. Kaldamäe, S. Groote, J. G. Körner

We provide analytical results for the $O({\alpha }_s)$ corrections to the double-spin density matrix elements in the reaction $e^{+}{e}^{-}\to t\bar{t}$. These concern the elements $ll$, $lt$, $l…