Flavor violation and $\tan{\beta}$ in gauge mediated models with messenger-matter mixing

Abstract

We consider the Minimal Gauge Mediated Model (MGMM) with either fundamental or antisymmetric messenger multiplets and study consequences of messenger-matter mixing. We find that in these models, unlike MGMM without mixing, wide range of $\tan\beta$ is allowed. It is shown that existing experimental limits on processes with lepton flavor violation, and on $K^0-\bar{K}^0$, $D^0-\bar{D}^0$ and $B^0-\bar{B}^0$ - mixing place significant constraints on relevant coupling constants and mixing parameters. On the other hand, the contributions of the messenger-matter mixing to the rates of $\tau \to e\gamma$, $\tau \to \mu\gamma$ and $b\to s\gamma$ may be well below the present experimental limits depending on the value of $\tan\beta$. We also point out the possibility of sizeable slepton oscillations in this model.