Abstract
We construct a gauge mediation model of dynamical supersymmetry breaking (DSB) based on a vector-like gauge theory, in which there is a unique color-preserving true vacuum. The DSB scale Λ/4 π turns out to be as high as Λ/4π≃10 8 –9 GeV , since the transmission of the DSB effects to the standard model sector is completed through much higher loops. This model is perfectly natural and phenomenologically consistent. We also stress that the dangerous D-term problem for the messenger U(1) m is automatically solved by a charge conjugation symmetry in the vector-like gauge theory.
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