Sliding singlet and stability of mass hierarchy

For a wide class of models with a heavy sliding singlet and soft breaking of supersymmetry (say, due to N=1 supergravity effects) it is shown that the doublet-triplet hierarchy obtained at the tree level is not broken by quantum corrections to all orders of the perturbation theory. An exampl proposed is the SU(5) model with the heavy sliding singlet, where the Higgs superfield triplets are heavy, m3 approximately Msub(GU), while the doublets are light, m2 approximately Msub(W)