The minimal supersymmetric grand unified theory: I. symmetry breaking   and the particle spectrum
  We discuss in detail the symmetry breaking and related issues in the minimal renormalizable supersymmetric grand unified theory. We compute the particle spectrum and study its impact on the physical scales of the theory. This provides a framework for the analysis of phenomenological implications of the theory, to be carried out in part II. 
Borut Bajc, Alejandra Melfo, Goran Senjanovic and Francesco Vissani