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Constraints on non-universal soft terms from flavor changing neutral currents

The smallness of flavor changing neutral currents constrains the soft parameter space of supersymmetric extensions of the Standard Model. These low energy constraints are translated to the soft parameter space generated at some high energy scale $\Mgut$. For gaugino masses larger than the scalar masses and non-universal $A$-terms the constraints are significantly diluted at $\Mgut$ and do allow for the possibility of non-universal scalar masses. The strongest constraints arise in the slepton sector of the theory.