SUSY-QCD corrections to top and bottom squark decays into Higgs bosons - art. no. 115007

We calculate the O(alpha(s)) SUSY-QCD corrections to the widths of top and bottom squark decays into Higgs bosons within the minimal supersymmetric st andard model. We give the complete analytical formulas, paying particular a ttention to the on-shell renormalization of the soft SUSY-breaking paramete rs. We also perform a detailed numerical analysis of both top and bottom sq uark decays into all Higgs bosons h(0), H-0, A(0), and H+/- We find that th e SUSY-QCD corrections are significant, mostly negative, and of the order o f a few ten percent. [S0556-2821(99)04211-3].