Third generation sfermion decays into Z and W gauge bosons:: Full one-loop analysis -: art. no. 095001

The complete one-loop radiative corrections to third-generation scalar fermions into gauge bosons Z and W+/- is considered. We focus on f(2)-> Zf(1) and f(i)-> W(+/-)f(j)', f,f'=t,b. We include SUSY-QCD, QED, and full electroweak corrections. It is found that the electroweak corrections can be of the same order as the SUSY-QCD corrections. The two sets of corrections interfere destructively in some region of parameter space. The full one-loop correction can reach 10% in some supergravity scenario, while in model independent analysis like general the minimal supersymmetric standard model, the one-loop correction can reach 20% for large tan beta and large trilinear soft breaking terms A(b).