Renormalization Group Naturalness of GUT Higgs Potentials
  We analyze the symmetry-breaking patterns of grand unified theories from the point of view of a recently-proposed criterion of renormalization-group naturalness. We perform the analysis on simple non-SUSY SU(5) and SO(10) and SUSY SU(5) GUTs. We find that the naturalness criterion can favor spontaneous-symmetry-breaking in the direction of the smallest of the maximal little groups. Some differences between theories with and without supersymmetry are also emphasized. 
B. C. Allanach, G. Amelino-Camelia, O. Philipsen, O. Pisanti, L. Rosa