Leading Supersymmetric Electroweak Corrections to Top Quark Decay into a Neutralino and Light Stop

We calculate the leading supersymmetric electroweak corrections to t → t₁x_j0 using dimensional reduction scheme within an approximation of low tan β, which can easily be extended to t→x_jb_i. The numerical results show that such corrections can exceed -12% for tan β = 2 and -6% for tan β = 11, respectively. And these corrections vary insensitively with mi, in the region allowed by the kinematics except for ones near the threshold.