Flavor mixing and rare B and K decays in the minimal 331 model

Abstract

We analyze the implications of the minimal 331 model with respect to flavor physics. These new contributions stem from the tree level exchange of a flavor changing additional Z' gauge boson. The observables under investigation are the mixing related observables ϵK δMK, δMK, δMd/s and sin 2β, which we use to constrain the parameter space, as well as the rare decays K →, KL → and Bd/s → μ+μ-1. We find that significant effects are still possible in the K physics sector, while the B physics sector is already rather strongly constrained. The exception is the Bs - B̄s mixing phase βs, which can be large.