A Note on the QCD Corrections to Forward--Backward Asymmetries of   Heavy--Quark Jets in Z Decays
  The measurement of the forward-backward asymmetries of heavy quarks provides one of the most precise determinations of $\sin^2\theta_W$ in $Z$ decays. We discuss in detail the one--loop QCD radiative corrections to these asymmetries. Results are given for single heavy--quark jet asymmetries and asymmetries of the thrust axis, as well as for heavy--quark two--jet final states.} 
A. Djouadi, B. Lampe and P. M. Zerwas