Yukawa unification in moduli-dominant SUSY breaking

We study Yukawa unification in string models with moduli-dominant SUSY breaking. This type of SUSY breaking in general leads to non-universal soft masses, i.e. soft scalar masses and gaugino masses. Such non-universality is important for phenomenological aspects of Yukawa unification, i.e., successful electroweak breaking, SUSY corrections to the bottom mass and the branching ratio of b → sγ, We show three regions in the whole parameter space that lead to successful electroweak breaking and allow small SUSY corrections to the bottom mass. For these three regions we investigate the b → sγ decay and mass spectra. © 1998 Elsevier Science B.V.