Flavor violation and $\tanβ$ 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 $\tanβ$ 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 $τ\to eγ$, $τ\to μγ$ and $b\to sγ$ may be well below the present experimental limits depending on the value of $\tanβ$. We also point out the possibility of sizeable slepton oscillations in this model.