# Flavor changing in the flipped trinification

## TL;DR

This paper explores how flipped trinification models naturally induce flavor-changing neutral currents in quark and lepton sectors, with potential implications for particle physics beyond the Standard Model.

## Contribution

It demonstrates that flipped trinification inherently predicts flavor-changing neutral currents, unlike minimal left-right models, highlighting a novel aspect of this unification framework.

## Key findings

- Tree-level quark flavor-changing neutral currents due to nonuniversal Z' couplings.
- Lepton flavor-changing processes like l→l'γ occur at one-loop level via new charged currents.
- Flavor-changing effects are unique to flipped trinification, not present in minimal left-right models.

## Abstract

The flipped trinification, a framework for unifying the 3-3-1 and left-right symmetries, has recently been proposed in order to solve profound questions, the weak parity violation and the number of families, besides the implication for neutrino mass generation and dark matter stability. In this work, we argue that this gauge-completion naturally provides flavor-changing neutral currents in both quark and lepton sectors. The quark flavor changing happens at the tree-level due to the nonuniversal couplings of $Z'_{L,R}$, while the lepton flavor changing $l\rightarrow l'\gamma$ starts from the one loop level contributed significantly by the new charged currents of $Y_{L,R}$, which couple ordinary to exotic leptons. These effects disappear in the minimal left-right model, but are present in the framework characterizing a flipped trinification symmetry.