Double protection of the Higgs potential
  A mechanism of double protection of the Higgs potential, by supersymmetry and by a global symmetry, is investigated in a class of supersymmetric models with the SU(3)xSU(3)xU(1) gauge symmetry. In such models the electroweak symmetry can be broken with no fine-tuning at all. 
Zurab Berezhiani, Piotr H. Chankowski, Adam Falkowski, Stefan Pokorski