The messenger sector of SUSY flavour models and radiative breaking of flavour universality

Abstract

The avour messenger sectors and their impact on the soft SUSY breaking terms are investigated in SUSY avour models. In the case when the avour scale M is below the SUSY breaking mediation scale MS, the universality of soft terms, even if assumed at MS, is radiatively broken. We estimate this effect in a broad class of models. In the CKM basis that effect gives avour off-diagonal soft masses comparable to the tree-level estimate based on the avour symmetry.