Impact of SUSY-QCD corrections on top quark decay distributions
  We compute the supersymmetric QCD corrections to the decay distribution of polarized top quarks for the semileptonic decay mode $t(\uparrow)\to b l^+\nu_l$. As a byproduct, we reinvestigate the SUSY-QCD corrections to the total decay width $\Gamma(t\to W^+b)$ and resolve a discrepancy between two previous results in the literature. 
A. Brandenburg, M. Maniatis