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Meson and anti-meson mixing processes constitute an important source ofconstraints on models that give tree level contributions to flavor violatingneutral processes. In electroweak $ \text{SU}(3)_\text{L} \times \text{U}(1)_N$ models, where anomaly cancellation requires that one family of quarkstransforms differently from the other ones, processes involving flavor changingneutral currents gain tree level contributions mediated by gauge and scalarfields. Here, we firstly investigate the contributions of the neutral scalarthat mimics the standard Higgs to the $K^0-\bar K^0$, $B^0-\bar B^0$, and$D^0-\bar D^0$ mixing processes and confront our predictions with experiments.The results will determine the quark mixing matrices $V^{u,d}_L$. In possessionof this information we, next, evaluate the contributions of the neutral gaugebosons $Z^{\prime}$ and $Z$ to the $K^0-\bar K^0$, $B^0-\bar B^0$, and$D^0-\bar D^0$ processes. This realistic approach to meson transitions willprovide severe bounds on $M_{ Z^{\prime}}$ and $Z-Z^{\prime}$ mixing angle.

Bounds on quark mixing, $M_{Z^{\prime}}$ and $Z-Z^{\prime}$ mixing angle from flavor changing neutral processes in a 3-3-1 model